Urban updating ecological network construction method and device, equipment and medium

Abstract

The invention relates to an urban updating ecological network construction method, device and equipment and a medium, and the method comprises the steps: carrying out the spatial superposition of an ecological resistance surface index and an ecological backflow index, so as to determine a corrected ecological resistance surface, on the basis of a preset minimum accumulated resistance model, a communication path between any urban ecological source land is calculated and determined according to the corrected ecological resistance surface, and the communication path represents an ecological corridor in the urban ecological network; the method comprises the following steps: calculating and determining the selectivity and integration degree corresponding to each ecological corridor in an urban ecological network by adopting a space syntax, selecting a key ecological corridor in the urban ecological network based on the selectivity and integration degree corresponding to each ecological corridor, and constructing an urban updated ecological network based on the key ecological corridor. Therefore, the construction of the urban updated ecological network is completed. According to the method, the fairness of the urban green space can be improved, the urban heat island effect can be effectively relieved, the biological diversity is improved, and the human settlement environment quality is improved.

Description

Technical Field

[0001] The present application relates to the field of ecological network construction, and in particular to a method for constructing an urban renewal ecological network, a corresponding device, an electronic device, and a computer-readable storage medium. Background Art

[0003] Ecological network is a spatial planning and management tool aimed at protecting and restoring natural ecosystems and their functions. It usually consists of a series of ecological source areas (such as nature reserves, forests, wetlands, etc.), ecological corridors (such as rivers, greenways, etc.) and buffer zones, which work together to enhance the connectivity, biodiversity and overall health of the ecosystem.

[0004] At present, most ecological resistance surfaces are calculated based on the type of land use. The ecological network calculated by this model is undoubtedly difficult to pass through the old urban area. However, as urbanization development gradually changes from incremental to stock mode, old urban areas are also facing the need for urban renewal and transformation. Therefore, if the ecological network designed by the national land space planning cannot pass through the old urban area, then this network will undoubtedly not be able to provide accurate spatial guidance for the implementation of ecological restoration at key nodes of the urban renewal action in the old urban area.

[0005] To sum up, in order to adapt to the problems in the existing technology that the ecological network after urban renewal cannot pass through the old city and cannot provide accurate spatial guidance for the implementation of ecological restoration at key nodes of the old city urban renewal action, the applicant has made corresponding explorations to solve this problem. Summary of the invention

[0006] The purpose of this application is to solve the above-mentioned problems and provide a method for constructing an urban renewal ecological network, a corresponding device, an electronic device and a computer-readable storage medium.

[0007] In order to meet the various objectives of this application, this application adopts the following technical solutions:

[0008] A method for constructing an urban renewal ecological network proposed to meet one of the purposes of this application includes:

[0009] In response to the urban renewal ecological network construction instruction, urban land space planning data is obtained, and spots corresponding to land areas exceeding a preset area threshold and land use types of forest land or water areas are selected from the urban land space planning data to construct a spot data set, and the ecosystem service value and the number of neighborhood spots corresponding to each spot in the spot data set are calculated and determined, and the spots with higher ecosystem service values ​​and fewer neighborhood spots are used as urban ecological sources;

[0010] Determine the OLI multispectral data and urban building height data corresponding to the urban ecological source, calculate and determine the normalized vegetation index and the normalized water index based on the OLI multispectral data, calculate and determine the ecological richness index according to the normalized vegetation index and the normalized water index, determine the normalized construction intensity index based on the urban building height data, and determine the ecological resistance surface index according to the ratio between the ecological richness index and the normalized construction intensity index;

[0011] Extracting the spatial position corresponding to each plot to be urban renewed from the urban land spatial planning data, determining the urban vitality index, transformation cost index and traffic convenience index corresponding to each plot to be urban renewed based on the spatial position corresponding to each plot to be urban renewed, and calculating and determining the ecological return index corresponding to each plot to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index;

[0012] The ecological resistance surface index and the ecological reflow index are spatially superimposed to determine a modified ecological resistance surface, and the connection paths between any urban ecological sources are calculated based on the modified ecological resistance surface based on a preset minimum cumulative resistance model, wherein the connection paths represent ecological corridors in the urban ecological network;

[0013] The spatial syntax calculation is used to determine the selectivity and integration corresponding to each ecological corridor in the urban ecological network. The key ecological corridors in the urban ecological network are selected based on the selectivity and integration corresponding to each ecological corridor. The ecological network after urban renewal is constructed based on the key ecological corridors to complete the construction of the urban renewal ecological network.

[0014] Optionally, the steps of selecting spots corresponding to land areas exceeding a preset area threshold and land use types of forest land or water area from the urban land spatial planning data to construct a spot data set, calculating and determining the ecosystem service value and the number of neighborhood spots corresponding to each spot in the spot data set, and taking spots with higher ecosystem service values ​​and fewer number of neighborhood spots as urban ecological sources include:

[0015] Determine the unit area value of the land use type of forest land or water area and the area of ​​the corresponding map area of ​​the land use type of forest land or water area in the map area data set, and calculate and determine the ecosystem service value corresponding to each map area in the map area data set based on the corresponding product between the unit area value of the land use type of forest land or water area and the area of ​​the corresponding map area of ​​the land use type of forest land or water area in the map area data set, wherein the ecosystem service value represents the ecological importance;

[0016] Calculate and determine the proximity distance between any two spots in the spot data set, count the number of spots within a preset distance threshold for each spot, and use it as the number of neighborhood spots corresponding to each spot, wherein the number of neighborhood spots represents ecological scarcity;

[0017] In the patch data set, patches whose ecosystem service value exceeds the preset service value threshold and whose number of neighborhood patches is lower than the preset number threshold are selected, and patches whose ecosystem service value exceeds the preset service value threshold and whose number of neighborhood patches is lower than the preset number threshold are taken as urban ecological sources.

[0018] Optionally, the steps of calculating and determining a normalized vegetation index and a normalized water index based on the OLI multispectral data, and calculating and determining an ecological richness index according to the normalized vegetation index and the normalized water index include:

[0019] Obtaining the reflectance values ​​of the near infrared band, the red band and the green band in the OLI multispectral data;

[0020] Calculate and determine a first difference between the reflectance value of the near-infrared band and the reflectance value of the red band, calculate and determine a first sum between the reflectance value of the near-infrared band and the reflectance value of the red band, and determine a normalized vegetation index based on a ratio between the first difference and the first sum;

[0021] Calculate and determine a second difference between the reflection value of the green band and the reflection value of the near-infrared band, calculate and determine a second sum between the reflection value of the green band and the reflection value of the near-infrared band, and determine a normalized water index based on a ratio between the second difference and the second sum;

[0022] The normalized vegetation index and the normalized water body index are equally weighted added to determine an ecological richness index of a preset grid size.

[0023] Optionally, the step of determining a normalized construction intensity index based on the urban building height data includes:

[0024] Determine the highest value and the lowest value corresponding to the urban building height data, and calculate and determine a third difference between the highest value corresponding to the urban building height data and the lowest value corresponding to the urban building height data;

[0025] The third sum value between the highest value corresponding to the urban building height data and the lowest value corresponding to the urban building height data is calculated and determined;

[0026] The normalized construction intensity index is determined based on a ratio between the third difference and the third sum.

[0027] Optionally, based on the spatial position corresponding to each plot to be urban renewed, the urban vitality index, the transformation cost index and the traffic convenience index corresponding to each plot to be urban renewed are determined, and the step of calculating and determining the ecological return index corresponding to each plot to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index includes:

[0028] Obtain the POI data, surrounding housing price data and road network level corresponding to each plot to be urban renewed;

[0029] Performing kernel density analysis based on the POI data to calculate and determine the urban vitality index corresponding to each plot to be urban renewed;

[0030] Calculate and determine the corresponding renovation cost of each land parcel to be urban renewed based on surrounding housing price data, and normalize the renovation cost to determine the corresponding renovation cost index of each land parcel to be urban renewed;

[0031] Scoring and calculating the road network level to determine the traffic convenience index corresponding to each plot to be urban renewed;

[0032] The product of the urban vitality index, the transformation cost index and the traffic convenience index is reverse normalized to determine the ecological return index corresponding to each plot of land to be urban renewed.

[0033] Optionally, the step of spatially superimposing the ecological resistance surface index and the ecological reflow index to determine a modified ecological resistance surface, and calculating and determining the connection path between any urban ecological sources according to the modified ecological resistance surface based on a preset minimum cumulative resistance model includes:

[0034] Determine an ecological resistance surface index and an ecological return index, and spatially overlay the ecological resistance surface index and the ecological return index to determine a revised ecological resistance surface, wherein the ecological resistance surface represents a comprehensive ecological resistance value corresponding to each plot to be updated;

[0035] Based on the preset minimum cumulative resistance model, the cumulative value of the ecological resistance value of each section of the path between any urban ecological source areas is calculated;

[0036] The connected path with the smallest cumulative value of the ecological resistance value is used as the connected path between any urban ecological sources.

[0037] Optionally, the step of using space syntax calculation to determine the selectivity and integration degree corresponding to each ecological corridor in the urban ecological network, and selecting key ecological corridors in the urban ecological network based on the selectivity and integration degree corresponding to each ecological corridor includes:

[0038] The selectivity and integration of each ecological corridor are equally weighted and summed to obtain a comprehensive evaluation index;

[0039] The ecological corridor corresponding to the highest comprehensive evaluation index is taken as the key ecological corridor in the urban ecological network.

[0040] A device for constructing an urban renewal ecological network adapted to another purpose of the present application includes:

[0041] An ecological source determination module is configured to respond to an urban renewal ecological network construction instruction, obtain urban land space planning data, select from the urban land space planning data the spots corresponding to land areas exceeding a preset area threshold and land use types of forest land or water areas to construct a spot data set, calculate and determine the ecosystem service value and the number of neighborhood spots corresponding to each spot in the spot data set, and use the spots with higher ecosystem service values ​​and fewer neighborhood spots as urban ecological sources;

[0042] An ecological resistance surface determination module is configured to use the OLI multispectral data and the urban building height data corresponding to the urban ecological source, calculate and determine the normalized vegetation index and the normalized water index based on the OLI multispectral data, calculate and determine the ecological richness index based on the normalized vegetation index and the normalized water index, determine the normalized construction intensity index based on the urban building height data, and determine the ecological resistance surface index based on the ratio between the ecological richness index and the normalized construction intensity index;

[0043] An ecological return flow index determination module is configured to extract the spatial position corresponding to each land parcel to be urban renewed from the urban land spatial planning data, determine the urban vitality index, transformation cost index and traffic convenience index corresponding to each land parcel to be urban renewed based on the spatial position corresponding to each land parcel to be urban renewed, and calculate and determine the ecological return flow index corresponding to each land parcel to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index;

[0044] An ecological corridor determination module is configured to spatially overlay the ecological resistance surface index and the ecological reflow index to determine a modified ecological resistance surface, and to calculate and determine a connection path between any urban ecological sources based on the modified ecological resistance surface based on a preset minimum cumulative resistance model, wherein the connection path represents an ecological corridor in an urban ecological network;

[0045] The ecological network construction module is configured to use space syntax calculation to determine the selectivity and integration corresponding to each ecological corridor in the urban ecological network, select the key ecological corridors in the urban ecological network based on the selectivity and integration corresponding to each ecological corridor, and construct the ecological network after urban renewal based on the key ecological corridors to complete the construction of the urban renewal ecological network.

[0046] An electronic device provided to meet another purpose of the present application includes a central processing unit and a memory, wherein the central processing unit is used to call and run a computer program stored in the memory to execute the steps of the urban renewal ecological network construction method described in the present application.

[0047] A computer-readable storage medium is provided to meet another purpose of the present application, which stores a computer program implemented according to the urban renewal ecological network construction method in the form of computer-readable instructions. When the computer program is called and executed by a computer, the steps included in the corresponding method are executed.

[0048] Compared with the prior art, this application aims to solve the problems that the ecological network after urban renewal in the prior art cannot pass through the old urban area and cannot provide accurate spatial guidance for the implementation of ecological restoration at key nodes of the urban renewal action in the old urban area. This application includes but is not limited to the following beneficial effects:

[0049] First, the urban renewal ecological network construction method of this application, based on the analysis of the ecological network reconstruction needs of the old urban area, implants urban renewal as an important scenario into the minimum cumulative resistance model for ecological corridor calculation, and constructs the material basis for the connectivity of the ecological network of future urban scenarios based on the ecological return index within the urban renewal area and the ecological richness index outside the urban renewal area. This application takes into account both the existing urban ecological space and the ecological space that may be restored by future urban renewal. This ecological network reconstruction process can ensure that the ecological network structure designed for national land space planning can better meet the needs of future ecological city construction;

[0050] Second, the urban renewal ecological network construction method of this application not only focuses on the protection of cultural heritage by urban renewal actions, but also can enhance the thinking of ecological restoration layout in old urban areas. In the process of modernization, the reconstruction of ecological networks in old urban areas can not only increase the fairness of urban green space, but also effectively alleviate the urban heat island effect, enhance biodiversity and improve the quality of the living environment. This technology-driven spatial governance model is more in line with the concept of sustainable urban development and has injected new vitality into the high-quality development of old urban areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0052] Figure 1 A schematic diagram of the process of constructing an urban renewal ecological network in an embodiment of the present application;

[0053] Figure 2 This is a schematic diagram of the process of reconstructing the spatial layout of the ecological network for urban renewal in the old city in the embodiment of the present application;

[0054] Figure 3 This is a principle block diagram of the urban renewal ecological network construction device in the embodiment of the present application;

[0055] Figure 4 It is a schematic diagram of the structure of the computer device in the embodiment of the present application. DETAILED DESCRIPTION

[0056] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0057] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0058] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0059] It will be understood by those skilled in the art that the terms "client", "terminal" and "terminal device" as used herein include both devices with wireless signal receivers, which are devices with only wireless signal receivers without transmission capability, and devices with receiving and transmitting hardware, which are devices with receiving and transmitting hardware capable of two-way communication over a two-way communication link. Such devices may include: cellular or other communication devices such as personal computers, tablet computers, which have single-line displays or multi-line displays or cellular or other communication devices without multi-line displays; PCS (Personal Communications Services) which may combine voice, data processing, fax and / or data communication capabilities; PDA (Personal Digital Assistant) which may include a radio frequency receiver, pager, Internet / intranet access, web browser, notepad, calendar and / or GPS (Global Positioning System) receiver; conventional laptop and / or palmtop computers or other devices which have and / or include a radio frequency receiver. The "client", "terminal" and "terminal device" used herein may be portable, transportable, installed in a vehicle (air, sea and / or land), or adapted and / or configured to run locally, and / or in a distributed form, at any other location on the earth and / or in space. The "client", "terminal" and "terminal device" used herein may also be a communication terminal, an Internet terminal, a music / video playing terminal, such as a PDA, a MID (Mobile Internet Device) and / or a mobile phone with a music / video playing function, or may be a smart TV, a set-top box and other devices.

[0060] The hardware referred to by the names such as "server", "client", and "service node" in this application is essentially an electronic device with the equivalent capabilities of a personal computer. It is a hardware device with the necessary components revealed by the von Neumann principle, such as a central processing unit (including an arithmetic unit and a controller), a memory, an input device, and an output device. The computer program is stored in its memory, and the central processing unit calls the program stored in the external memory into the internal memory for execution, executes the instructions in the program, and interacts with the input and output devices to complete specific functions.

[0061] It should be pointed out that the concept of "server" referred to in this application can also be extended to the case of server clusters. According to the network deployment principle understood by those skilled in the art, the servers should be logically divided. In physical space, these servers can be independent of each other but can be called through interfaces, or integrated into a physical computer or a set of computer clusters. Those skilled in the art should understand this flexibility, and should not use it to restrict the implementation of the network deployment method of this application.

[0062] Unless expressly specified, one or more technical features of the present application can be deployed on a server for implementation and accessed by a client through a remote call to obtain an online service interface provided by the server, or can be directly deployed and run on a client for access.

[0063] The neural network models referenced or may be referenced in this application, unless expressly specified, can be deployed on a remote server and remotely called on the client, or can be deployed and directly called on a client with sufficient device capabilities. In some embodiments, when it runs on the client, its corresponding intelligence can be obtained through transfer learning to reduce the requirements for the client's hardware operating resources and avoid excessive occupation of the client's hardware operating resources.

[0064] Unless explicitly specified, the various data involved in this application can be stored remotely on a server or on a local terminal device, as long as it is suitable for being called by the technical solution of this application.

[0065] Those skilled in the art should be aware that, although the various methods of the present application are described based on the same concept and thus present commonality to each other, unless otherwise specified, these methods can be independently executed. Similarly, for each embodiment disclosed in the present application, they are all proposed based on the same inventive concept, therefore, concepts with the same expression, and concepts that are appropriately changed for convenience despite different expressions, should be understood as equivalent.

[0066] Unless the mutually exclusive relationship between the embodiments to be disclosed in this application is explicitly stated, the relevant technical features involved in each embodiment can be cross-combined to flexibly construct a new embodiment, as long as such combination does not deviate from the creative spirit of this application and can meet the needs of the prior art or solve certain deficiencies in the prior art. Those skilled in the art should be aware of this flexibility.

[0067] See also Figure 1 as well as Figure 2 In one embodiment, the urban renewal ecological network construction method of the present application includes:

[0068] Step S10, responding to the urban renewal ecological network construction instruction, obtaining urban land space planning data, selecting from the urban land space planning data the spots corresponding to the land area exceeding the preset area threshold and the land use type being forest land or water area to construct a spot data set, calculating and determining the ecosystem service value and the number of neighborhood spots corresponding to each spot in the spot data set, and taking the spots with higher ecosystem service value and fewer neighborhood spots as urban ecological sources;

[0069] The computing terminal device can respond to the urban renewal ecological network construction instruction, obtain urban land space planning data, select the corresponding spots whose land area exceeds the preset area threshold a0 and whose land use type is forest or water from the urban land space planning data to construct a spot data set X, calculate and determine the ecosystem service value EX and the number of neighborhood spots corresponding to each spot in the spot data set X, and use the spots with higher ecosystem service value and fewer neighborhood spots as urban ecological sources; the urban land space planning data represents the spatial planning data constructed by the land plots to be urban renewed, urban buildings, forests and water areas.

[0070] The steps of selecting spots corresponding to land areas exceeding a preset area threshold and land use types of forest land or water area from the urban land spatial planning data to construct a spot data set, calculating and determining the ecosystem service value and the number of neighborhood spots corresponding to each spot in the spot data set, and taking spots with higher ecosystem service value and fewer number of neighborhood spots as urban ecological sources include:

[0071] Step S101, determining the unit area value of the land use type of forest land or water area and the area of ​​the corresponding spot of the land use type of forest land or water area in the spot data set, and calculating and determining the ecosystem service value corresponding to each spot in the spot data set based on the corresponding product between the unit area value of the land use type of forest land or water area and the area of ​​the corresponding spot of the land use type of forest land or water area in the spot data set, wherein the ecosystem service value represents ecological importance;

[0072] Specifically, the empirical parameter of ecosystem service value is multiplied by the land area of ​​the plot. The natural resource asset value assessment method can also be used to accurately measure the value. The basic calculation method of ecological importance assessment using the coefficient method is:

[0073] EX(n)=e k ×A k (n),

[0074] Where: EX(n) represents the ecosystem service value of the nth patch in X; e kA represents the unit area value of land type k; k (n) represents the area and land type of the nth patch. The higher the ecological service value of patch n, the higher the ecological service importance of the patch, and the higher the probability of being selected as an ecological source.

[0075] Step S103, calculating and determining the proximity distance between any two spots in the spot data set, counting the number of spots within a preset distance threshold for each spot, and taking it as the number of neighborhood spots corresponding to each spot, wherein the number of neighborhood spots represents ecological scarcity;

[0076] Specifically, the main steps for calculating the number of neighborhood patches include:

[0077] First, the GIS spatial proximity analysis tool is used to calculate the proximity distance between the spot n and the adjacent spots, and then the number of spots within the preset distance threshold is set, where the preset distance threshold can be set to d0; by counting the number of spots within the preset distance threshold for each spot, the scarcity of the ecological patch corresponding to the spot in the area can be measured. In theory, the fewer the number of adjacent spots of the spot n, the more irreplaceable the spot is in the area, and the old city ecological network reconstruction should select it as the ecological source.

[0078] Step S105: Select the patches whose ecosystem service value exceeds the preset service value threshold and whose number of neighborhood patches is lower than the preset number threshold in the patch data set, and take the patches whose ecosystem service value exceeds the preset service value threshold and whose number of neighborhood patches is lower than the preset number threshold as urban ecological sources.

[0079] The selection of urban ecological sources mainly adopts two searches: first, select the patches whose ecosystem service value is higher than the preset service value threshold ex0 from the patch dataset X, then select the patches whose number of neighbors is lower than the preset number threshold nh0 from the patch dataset X, and finally merge the patches that meet the above conditions at the same time to obtain the urban ecological source X0.

[0080] Step S20, determining the OLI multispectral data and the urban building height data corresponding to the urban ecological source, calculating and determining the normalized vegetation index and the normalized water index based on the OLI multispectral data, calculating and determining the ecological richness index according to the normalized vegetation index and the normalized water index, determining the normalized construction intensity index based on the urban building height data, and determining the ecological resistance surface index according to the ratio between the ecological richness index and the normalized construction intensity index;

[0081] After taking the patches with higher ecosystem service value and fewer neighborhood patches as urban ecological sources, determining the OLI multispectral data and urban building height data corresponding to the urban ecological sources, calculating and determining the normalized vegetation index (NDVI) and the normalized water index (NDWI) based on the OLI multispectral data, calculating and determining the ecological richness index E based on the normalized vegetation index and the normalized water index, determining the normalized construction intensity index B based on the urban building height data, and determining the ecological resistance surface index α based on the ratio between the ecological richness index E and the normalized construction intensity index B;

[0082] In some embodiments, OLI (Operational Land Imager) multispectral data is an important resource for earth observation and land remote sensing. Due to its high-quality spectral and spatial resolution, as well as global coverage, it has become an important resource in the field of earth observation and land remote sensing and is widely used in many fields of environment and resource management.

[0083] Further, the steps of calculating and determining the normalized vegetation index and the normalized water index based on the OLI multispectral data, and calculating and determining the ecological richness index according to the normalized vegetation index and the normalized water index include:

[0084] Step S201, obtaining the reflectance values ​​of the near infrared band, the red band and the green band in the OLI multispectral data;

[0085] Step S203, calculating and determining a first difference between the reflection value of the near-infrared band and the reflection value of the red band, calculating and determining a first sum between the reflection value of the near-infrared band and the reflection value of the red band, and determining a normalized vegetation index based on a ratio between the first difference and the first sum;

[0086] Step S205, calculating and determining a second difference between the reflection value of the green band and the reflection value of the near-infrared band, calculating and determining a second sum between the reflection value of the green band and the reflection value of the near-infrared band, and determining a normalized water index based on a ratio between the second difference and the second sum;

[0087] Step S207: performing an equal-weighted summation of the normalized vegetation index and the normalized water index to determine an ecological richness index of a preset grid size.

[0088] Specifically, a normalized vegetation index (NDVI) and a normalized water index (NDWI) are obtained by combining the near-infrared band, red band and green band of the OLI multispectral data, and then the NDVI and NDWI are equally weighted added to determine the ecological richness index of a preset grid size, wherein the calculation formula of the normalized vegetation index is: NDVI = (NIR-R) / (NIR+R); the calculation formula of the normalized water index is: (G-NIR) / (G+NIR); the calculation formula of the ecological richness index is E = 0.5*NDVI+0.5*NDWI, wherein: NIR, R, and G are the reflectance values ​​of the near-infrared band, the reflectance value of the red band, and the reflectance value of the green band, respectively.

[0089] The step of determining a normalized construction intensity index based on the urban building height data comprises:

[0090] Step S2001, determining the highest value and the lowest value corresponding to the urban building height data, and calculating and determining a third difference between the highest value corresponding to the urban building height data and the lowest value corresponding to the urban building height data;

[0091] Step S2003, calculating and determining a third sum value between the highest value corresponding to the urban building height data and the lowest value corresponding to the urban building height data;

[0092] Step S2005: Determine the normalized construction intensity index based on the ratio between the third difference and the third sum.

[0093] Specifically, the construction intensity index B is mainly calculated using the building height data. The building height data can be obtained from third parties such as navigation maps, or can be obtained by monitoring using LiDAR laser radar technology. The calculation formula for the normalized construction intensity index is:

[0094] B=(B max -B min ) / (B max +B min ),

[0095] Where: B max and B min They are respectively the highest and lowest values ​​corresponding to the urban building height data.

[0096] Furthermore, the initialization method of the ecological resistance surface α is to divide the construction intensity index B and the ecological richness index E. Its characteristic is that the higher the value of the ecological resistance surface α, the greater the ecological resistance value, and vice versa.

[0097] Step S30, extracting the spatial position corresponding to each plot to be urban renewed from the urban land spatial planning data, determining the urban vitality index, transformation cost index and traffic convenience index corresponding to each plot to be urban renewed based on the spatial position corresponding to each plot to be urban renewed, and calculating and determining the ecological return index corresponding to each plot to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index;

[0098] After determining the ecological resistance surface index according to the ratio between the ecological richness index and the normalized construction intensity index, extracting the spatial position corresponding to each plot to be urban renewed from the urban land spatial planning data, determining the urban vitality index v, the transformation cost index c and the traffic convenience index t corresponding to each plot to be urban renewed based on the spatial position corresponding to each plot to be urban renewed, and calculating and determining the ecological return index β corresponding to each plot to be urban renewed based on the urban vitality index v, the transformation cost index c and the traffic convenience index t;

[0099] Based on the spatial position corresponding to each plot to be urban renewed, the urban vitality index, transformation cost index and traffic convenience index corresponding to each plot to be urban renewed are determined, and the steps of calculating and determining the ecological return index corresponding to each plot to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index include:

[0100] Step S301, obtaining POI data, surrounding housing price data and road network level corresponding to each plot to be urban renewed;

[0101] Step S303: performing kernel density analysis based on the POI data to calculate and determine the urban vitality index corresponding to each plot to be urban renewed;

[0102] Step S305: Calculate and determine the corresponding renovation cost of each land parcel to be urban renewed based on the surrounding housing price data, and normalize the renovation cost to determine the corresponding renovation cost index of each land parcel to be urban renewed;

[0103] Step S307: Calculate and score the road network level to determine the traffic convenience index corresponding to each plot to be urban renewed;

[0104] Step S309: reverse normalize the product of the urban vitality index, the transformation cost index and the traffic convenience index to determine the ecological return index corresponding to each plot to be urban renewed.

[0105] In some embodiments, POI (Points of Interest) data refers to a collection of information about important points or points of interest at a specific geographical location. These points are usually landmark locations such as commercial, cultural, social services or other public facilities.

[0106] Specifically, the ecological return index is obtained by multiplying the urban vitality index v, the urban renewal difficulty index c and the traffic convenience index t, and then reverse normalizing them, that is, the ecological return index β = 1-v*c*t.

[0107] Step S40, spatially superimposing the ecological resistance surface index and the ecological reflow index to determine a modified ecological resistance surface, and calculating and determining the connection path between any urban ecological sources based on the modified ecological resistance surface based on a preset minimum cumulative resistance model, wherein the connection path represents an ecological corridor in the urban ecological network;

[0108] After calculating and determining the ecological return index β corresponding to each plot to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index, the ecological resistance surface index and the ecological return index are spatially superimposed to determine the revised ecological resistance surface R, and the connection path between any urban ecological sources is calculated based on the preset minimum cumulative resistance model according to the revised ecological resistance surface, wherein the connection path represents the ecological corridor in the urban ecological network;

[0109] Furthermore, the ecological resistance surface index and the ecological return flow index are spatially superimposed to determine a modified ecological resistance surface, and the step of calculating and determining the connection path between any urban ecological sources according to the modified ecological resistance surface based on a preset minimum cumulative resistance model includes:

[0110] Step S401, determining an ecological resistance surface index and an ecological reflow index, and spatially superimposing the ecological resistance surface index and the ecological reflow index to determine a revised ecological resistance surface, wherein the ecological resistance surface represents a comprehensive ecological resistance value corresponding to each plot to be updated;

[0111] Step S403: calculating and determining the cumulative value of the ecological resistance value of each section of the path between any urban ecological source areas based on a preset minimum cumulative resistance model;

[0112] Step S405: taking the connected path with the smallest cumulative value of the ecological resistance value as the connected path between any urban ecological sources.

[0113] Specifically, the correction of the ecological resistance surface is mainly to spatially superimpose the ecological resistance surface α and the ecological reflow coefficient β. The calculation formula for spatial superposition is:

[0114]

[0115] The connecting corridors between any urban ecological sources are mainly identified using the minimum cumulative resistance model. The cumulative resistance model mainly uses the GIS minimum cost distance tool to measure the shortest travel mode of any source on the corrected ecological resistance surface R, and the connecting path with the smallest cumulative value of the ecological resistance value is used as the connecting path between any urban ecological sources.

[0116] Step S50, using space syntax calculation to determine the selectivity and integration corresponding to each ecological corridor in the urban ecological network, selecting key ecological corridors in the urban ecological network based on the selectivity and integration corresponding to each ecological corridor, and constructing the ecological network after urban renewal based on the key ecological corridors to complete the construction of the urban renewal ecological network.

[0117] After determining the connectivity paths between any urban ecological sources based on the preset minimum cumulative resistance model and the modified ecological resistance surface, spatial syntax is used to determine the selectivity and integration corresponding to each ecological corridor in the urban ecological network. Based on the selectivity and integration corresponding to each ecological corridor, the key ecological corridors in the urban ecological network are selected, and the ecological network after urban renewal is constructed based on the key ecological corridors to complete the construction of the urban renewal ecological network.

[0118] The steps of using space syntax calculation to determine the selectivity and integration of each ecological corridor in the urban ecological network, and selecting key ecological corridors in the urban ecological network based on the selectivity and integration of each ecological corridor include:

[0119] Step S501: perform equal-weighted summation of the selectivity and integration of each ecological corridor to obtain a comprehensive evaluation index;

[0120] Step S503: The ecological corridor corresponding to the highest comprehensive evaluation index is used as the key ecological corridor in the urban ecological network.

[0121] In some embodiments, Space Syntax is a method for analyzing urban spatial structure and connectivity, which can be applied to the design and analysis of ecological networks. In ecological networks, selectivity and integration can be interpreted as indicators for evaluating the importance and connectivity of each corridor in the network. Selectivity reflects the number of other paths that can be reached around each corridor. In an ecological network, a corridor with high selectivity means that it is a key path connecting multiple sources, which helps to increase the connectivity and accessibility of the overall network. Integration measures the structural position of each corridor in the overall network, especially its contribution to the centrality and coreness of the overall network. Corridors with high integration are usually paths with strong connectivity and fast information transmission.

[0122] It can be seen from the above embodiments that, compared with the prior art, the present application aims to solve the problems that the ecological network after urban renewal in the prior art cannot pass through the old urban area and cannot provide accurate spatial guidance for the implementation of ecological restoration at key nodes of the urban renewal action in the old urban area. The present application includes but is not limited to the following beneficial effects:

[0123] First, the urban renewal ecological network construction method of this application, based on the analysis of the ecological network reconstruction needs of the old urban area, implants urban renewal as an important scenario into the minimum cumulative resistance model for ecological corridor calculation, and constructs the material basis for the connectivity of the ecological network of future urban scenarios based on the ecological return index within the urban renewal area and the ecological richness index outside the urban renewal area. This application takes into account both the existing urban ecological space and the ecological space that may be restored by future urban renewal. This ecological network reconstruction process can ensure that the ecological network structure designed for national land space planning can better meet the needs of future ecological city construction;

[0124] Second, the urban renewal ecological network construction method of this application not only focuses on the protection of cultural heritage by urban renewal actions, but also can enhance the thinking of ecological restoration layout in old urban areas. In the process of modernization, the reconstruction of ecological networks in old urban areas can not only increase the fairness of urban green space, but also effectively alleviate the urban heat island effect, enhance biodiversity and improve the quality of the living environment. This technology-driven spatial governance model is more in line with the concept of sustainable urban development and has injected new vitality into the high-quality development of old urban areas.

[0125] See also Figure 3, an urban renewal ecological network construction device provided to meet one of the purposes of the present application, includes an ecological source determination module 1100, an ecological resistance surface determination module 1200, an ecological reflow index determination module 1300, an ecological corridor determination module 1400 and an ecological network construction module 1500. Among them, the ecological source determination module 1100 is configured to respond to the urban renewal ecological network construction instruction, obtain urban land space planning data, select from the urban land space planning data the corresponding spots whose land area exceeds a preset area threshold and whose land use type is forest land or water area to construct a spot data set, calculate and determine the ecosystem service value and the number of neighborhood spots corresponding to each spot in the spot data set, and use the spots with higher ecosystem service value and fewer neighborhood spots as urban ecological sources; the ecological resistance surface determination module 1200 is configured to obtain the OLI multispectral data and urban building height data corresponding to the urban ecological source, based on the OLI multispectral data and urban building height data corresponding to the urban ecological source. I multi-spectral data is used to calculate and determine the normalized vegetation index and the normalized water index, and the ecological richness index is calculated based on the normalized vegetation index and the normalized water index. The normalized construction intensity index is determined based on the urban building height data, and the ecological resistance surface index is determined according to the ratio between the ecological richness index and the normalized construction intensity index; the ecological return index determination module 1300 is configured to extract the spatial position corresponding to each plot to be urban renewed from the urban land spatial planning data, determine the urban vitality index, the transformation cost index and the traffic convenience index corresponding to each plot to be urban renewed based on the spatial position corresponding to each plot to be urban renewed, and calculate and determine the urban vitality index, the transformation cost index and the traffic convenience index of each plot to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index. The ecological reflow index corresponding to the plot; the ecological corridor determination module 1400 is configured to spatially superimpose the ecological resistance surface index and the ecological reflow index to determine the modified ecological resistance surface, and calculate the connection path between any urban ecological sources based on the preset minimum cumulative resistance model according to the modified ecological resistance surface, wherein the connection path represents the ecological corridor in the urban ecological network; the ecological network construction module 1500 is configured to use spatial syntax calculation to determine the selectivity and integration corresponding to each ecological corridor in the urban ecological network, select the key ecological corridors in the urban ecological network based on the selectivity and integration corresponding to each ecological corridor, and construct the ecological network after urban renewal based on the key ecological corridors to complete the construction of the urban renewal ecological network.

[0126] Based on any embodiment of this application, please refer to Figure 4 Another embodiment of the present application further provides an electronic device, which can be implemented by a computer device, such as Figure 4As shown, a schematic diagram of the internal structure of a computer device. The computer device includes a processor, a computer-readable storage medium, a memory, and a network interface connected via a system bus. Among them, the computer-readable storage medium of the computer device stores an operating system, a database, and computer-readable instructions. The database may store a control information sequence. When the computer-readable instructions are executed by the processor, the processor can implement a method for building an urban renewal ecological network. The processor of the computer device is used to provide computing and control capabilities to support the operation of the entire computer device. The memory of the computer device may store computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor can execute the urban renewal ecological network construction method of the present application. The network interface of the computer device is used to connect and communicate with a terminal. Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0127] In this embodiment, the processor is used to execute Figure 3 The memory stores the program code and various data required to execute the above modules or submodules. The network interface is used to transmit data between user terminals or servers. The memory in this embodiment stores the program code and data required to execute all modules / submodules in the urban renewal ecological network construction device of this application, and the server can call the program code and data of the server to execute the functions of all submodules.

[0128] The present application also provides a storage medium storing computer-readable instructions. When the computer-readable instructions are executed by one or more processors, the one or more processors execute the steps of the urban renewal ecological network construction method described in any embodiment of the present application.

[0129] The present application also provides a computer program product, including a computer program / instruction, which, when executed by one or more processors, implements the steps of the method for constructing an urban renewal ecological network described in any embodiment of the present application.

[0130] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments of the present application can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the aforementioned storage medium can be a computer-readable storage medium such as a disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0131] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

[0132] In summary, this application not only focuses on the protection of cultural heritage through urban renewal actions, but also enhances the thinking on ecological restoration layout in old urban areas. In the process of modernization, ecological network reconstruction in old urban areas can not only increase the fairness of urban green space, but also effectively alleviate the urban heat island effect, enhance biodiversity and improve the quality of the living environment. This technology-driven spatial governance model is more in line with the concept of sustainable urban development and has injected new vitality into the high-quality development of old urban areas.

Claims

1. A method for constructing an urban renewal ecological network, characterized in that: include: In response to the urban renewal ecological network construction instruction, urban land space planning data is obtained, and spots corresponding to land areas exceeding a preset area threshold and land use types of forest land or water areas are selected from the urban land space planning data to construct a spot data set, and the ecosystem service value and the number of neighborhood spots corresponding to each spot in the spot data set are calculated and determined, and the spots with higher ecosystem service values ​​and fewer neighborhood spots are used as urban ecological sources; Determine the OLI multispectral data and urban building height data corresponding to the urban ecological source, calculate and determine the normalized vegetation index and the normalized water index based on the OLI multispectral data, calculate and determine the ecological richness index according to the normalized vegetation index and the normalized water index, determine the normalized construction intensity index based on the urban building height data, and determine the ecological resistance surface index according to the ratio between the ecological richness index and the normalized construction intensity index; Extracting the spatial position corresponding to each plot to be urban renewed from the urban land spatial planning data, determining the urban vitality index, transformation cost index and traffic convenience index corresponding to each plot to be urban renewed based on the spatial position corresponding to each plot to be urban renewed, and calculating and determining the ecological return index corresponding to each plot to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index; The ecological resistance surface index and the ecological reflow index are spatially superimposed to determine a modified ecological resistance surface, and the connection paths between any urban ecological sources are calculated based on the modified ecological resistance surface based on a preset minimum cumulative resistance model, wherein the connection paths represent ecological corridors in the urban ecological network; The spatial syntax calculation is used to determine the selectivity and integration corresponding to each ecological corridor in the urban ecological network. The key ecological corridors in the urban ecological network are selected based on the selectivity and integration corresponding to each ecological corridor. The ecological network after urban renewal is constructed based on the key ecological corridors to complete the construction of the urban renewal ecological network.

2. The urban renewal ecological network construction method according to claim 1 is characterized in that: The steps of selecting spots corresponding to land areas exceeding a preset area threshold and land use types of forest land or water area from the urban land spatial planning data to construct a spot data set, calculating and determining the ecosystem service value and the number of neighborhood spots corresponding to each spot in the spot data set, and taking spots with higher ecosystem service value and fewer number of neighborhood spots as urban ecological sources include: Determine the unit area value of the land use type of forest land or water area and the area of ​​the corresponding map area of ​​the land use type of forest land or water area in the map area data set, and calculate and determine the ecosystem service value corresponding to each map area in the map area data set based on the corresponding product between the unit area value of the land use type of forest land or water area and the area of ​​the corresponding map area of ​​the land use type of forest land or water area in the map area data set, wherein the ecosystem service value represents the ecological importance; Calculate and determine the proximity distance between any two spots in the spot data set, count the number of spots within a preset distance threshold for each spot, and use it as the number of neighborhood spots corresponding to each spot, wherein the number of neighborhood spots represents ecological scarcity; In the patch data set, patches whose ecosystem service value exceeds the preset service value threshold and whose number of neighborhood patches is lower than the preset number threshold are selected, and patches whose ecosystem service value exceeds the preset service value threshold and whose number of neighborhood patches is lower than the preset number threshold are taken as urban ecological sources.

3. The urban renewal ecological network construction method according to claim 1 is characterized in that: The steps of calculating and determining a normalized vegetation index and a normalized water index based on the OLI multispectral data, and calculating and determining an ecological richness index according to the normalized vegetation index and the normalized water index include: Obtaining the reflectance values ​​of the near infrared band, the red band and the green band in the OLI multispectral data; Calculate and determine a first difference between the reflectance value of the near-infrared band and the reflectance value of the red band, calculate and determine a first sum between the reflectance value of the near-infrared band and the reflectance value of the red band, and determine a normalized vegetation index based on a ratio between the first difference and the first sum; Calculate and determine a second difference between the reflection value of the green band and the reflection value of the near-infrared band, calculate and determine a second sum between the reflection value of the green band and the reflection value of the near-infrared band, and determine a normalized water index based on a ratio between the second difference and the second sum; The normalized vegetation index and the normalized water body index are equally weighted added to determine an ecological richness index of a preset grid size.

4. The urban renewal ecological network construction method according to claim 1 is characterized in that: The step of determining a normalized construction intensity index based on the urban building height data comprises: Determine the highest value and the lowest value corresponding to the urban building height data, and calculate and determine a third difference between the highest value corresponding to the urban building height data and the lowest value corresponding to the urban building height data; The third sum value between the highest value corresponding to the urban building height data and the lowest value corresponding to the urban building height data is calculated and determined; The normalized construction intensity index is determined based on a ratio between the third difference and the third sum.

5. The urban renewal ecological network construction method according to claim 1 is characterized in that: Based on the spatial position corresponding to each plot to be urban renewed, the urban vitality index, transformation cost index and traffic convenience index corresponding to each plot to be urban renewed are determined, and the steps of calculating and determining the ecological return index corresponding to each plot to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index include: Obtain the POI data, surrounding housing price data and road network level corresponding to each plot to be urban renewed; Performing kernel density analysis based on the POI data to calculate and determine the urban vitality index corresponding to each plot to be urban renewed; Calculate and determine the corresponding renovation cost of each land parcel to be urban renewed based on surrounding housing price data, and normalize the renovation cost to determine the corresponding renovation cost index of each land parcel to be urban renewed; Scoring and calculating the road network level to determine the traffic convenience index corresponding to each plot to be urban renewed; The product of the urban vitality index, the transformation cost index and the traffic convenience index is reverse normalized to determine the ecological return index corresponding to each plot of land to be urban renewed.

6. The urban renewal ecological network construction method according to claim 1 is characterized in that: The steps of spatially superimposing the ecological resistance surface index and the ecological return flow index to determine a modified ecological resistance surface, and calculating and determining the connection paths between any urban ecological sources according to the modified ecological resistance surface based on a preset minimum cumulative resistance model include: Determine an ecological resistance surface index and an ecological return index, and spatially overlay the ecological resistance surface index and the ecological return index to determine a revised ecological resistance surface, wherein the ecological resistance surface represents a comprehensive ecological resistance value corresponding to each plot to be updated; Based on the preset minimum cumulative resistance model, the cumulative value of the ecological resistance value of each section of the path between any urban ecological source areas is calculated; The connected path with the smallest cumulative value of the ecological resistance value is used as the connected path between any urban ecological sources.

7. The method for constructing an urban renewal ecological network according to any one of claims 1 to 6, characterized in that: The steps of using space syntax calculation to determine the selectivity and integration of each ecological corridor in the urban ecological network, and selecting key ecological corridors in the urban ecological network based on the selectivity and integration of each ecological corridor include: The selectivity and integration of each ecological corridor are equally weighted and summed to obtain a comprehensive evaluation index; The ecological corridor corresponding to the highest comprehensive evaluation index is taken as the key ecological corridor in the urban ecological network.

8. A device for constructing an urban renewal ecological network, characterized in that: include: An ecological source determination module is configured to respond to an urban renewal ecological network construction instruction, obtain urban land space planning data, select from the urban land space planning data the spots corresponding to land areas exceeding a preset area threshold and land use types of forest land or water areas to construct a spot data set, calculate and determine the ecosystem service value and the number of neighborhood spots corresponding to each spot in the spot data set, and use the spots with higher ecosystem service values ​​and fewer neighborhood spots as urban ecological sources; An ecological resistance surface determination module is configured to use the OLI multispectral data and the urban building height data corresponding to the urban ecological source, calculate and determine the normalized vegetation index and the normalized water index based on the OLI multispectral data, calculate and determine the ecological richness index based on the normalized vegetation index and the normalized water index, determine the normalized construction intensity index based on the urban building height data, and determine the ecological resistance surface index based on the ratio between the ecological richness index and the normalized construction intensity index; An ecological return flow index determination module is configured to extract the spatial position corresponding to each land parcel to be urban renewed from the urban land spatial planning data, determine the urban vitality index, transformation cost index and traffic convenience index corresponding to each land parcel to be urban renewed based on the spatial position corresponding to each land parcel to be urban renewed, and calculate and determine the ecological return flow index corresponding to each land parcel to be urban renewed based on the urban vitality index, the transformation cost index and the traffic convenience index; An ecological corridor determination module is configured to spatially overlay the ecological resistance surface index and the ecological reflow index to determine a modified ecological resistance surface, and to calculate and determine a connection path between any urban ecological sources based on the modified ecological resistance surface based on a preset minimum cumulative resistance model, wherein the connection path represents an ecological corridor in an urban ecological network; The ecological network construction module is configured to use space syntax calculation to determine the selectivity and integration corresponding to each ecological corridor in the urban ecological network, select the key ecological corridors in the urban ecological network based on the selectivity and integration corresponding to each ecological corridor, and construct the ecological network after urban renewal based on the key ecological corridors to complete the construction of the urban renewal ecological network.

9. An electronic device, comprising a central processing unit and a memory, characterized in that: The central processing unit is used to call and run the computer program stored in the memory to execute the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: It stores a computer program implemented according to the method described in any one of claims 1 to 7 in the form of computer-readable instructions, and when the computer program is called and executed by a computer, the steps included in the corresponding method are executed.

Images