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

Abstract

The present application relates to a method, device, equipment, and medium for constructing an urban renewal ecological network. The method includes: spatially superimposing an ecological resistance surface index and an ecological return flow index to determine a revised ecological resistance surface; calculating and determining the connectivity paths between any urban ecological sources based on the revised ecological resistance surface based on a preset minimum cumulative resistance model, wherein the connectivity paths represent ecological corridors in the urban ecological network; using spatial syntax to calculate and 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; constructing an ecological network after urban renewal based on the key ecological corridors to complete the construction of the urban renewal ecological network. The present application 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 human living environment.

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, corresponding devices, electronic equipment, and computer-readable storage media. Background Art

[0002] An ecological network is a spatial planning and management tool designed to protect and restore natural ecosystems and their functions. It typically consists of a series of ecological resource areas (such as nature reserves, forests, and wetlands), ecological corridors (such as rivers and greenways), and buffer zones. These elements work together to enhance ecosystem connectivity, biodiversity, and overall health.

[0003] Currently, ecological resistance surfaces are mostly calculated based on land use type. The ecological networks calculated using these models are undoubtedly difficult to penetrate through old urban areas. However, as urbanization gradually shifts from incremental to stock-based development, old urban areas are also facing the need for urban renewal and transformation. Therefore, if the ecological network designed by national land space planning cannot penetrate old urban areas, then such a network will undoubtedly fail to provide accurate spatial guidance for implementing ecological restoration at key nodes in urban renewal initiatives in old urban areas.

[0004] To sum up, in order to adapt to the problems in the existing technology, such as the ecological network after urban renewal cannot pass through the old urban area and cannot provide accurate spatial guidance for the implementation of ecological restoration at key nodes of urban renewal actions in the old urban area, the applicant has made corresponding explorations to solve this problem. Summary of the Invention

[0005] The purpose of this application is to solve the above problems and provide a method for constructing an urban renewal ecological network, a corresponding device, an electronic device and a computer-readable storage medium.

[0006] In order to meet the various objectives of this application, this application adopts the following technical solutions:

[0007] A method for constructing an urban renewal ecological network, which is proposed to meet one of the purposes of this application, includes:

[0008] In response to an instruction to construct an urban renewal ecological network, obtain urban land spatial planning data, select from the urban land spatial planning data patches corresponding to land areas exceeding a preset area threshold and land use types of woodland or water to construct a patch dataset, calculate and determine the ecosystem service value and number of neighborhood patches corresponding to each patch in the patch dataset, and select patches with higher ecosystem service values ​​and fewer number of neighborhood patches as urban ecological source areas;

[0009] Determining the OLI multispectral data and urban building height data corresponding to the urban ecological source, calculating and determining a normalized vegetation index and a normalized water index based on the OLI multispectral data, calculating and determining an ecological richness index based on the normalized vegetation index and the normalized water index, determining a normalized construction intensity index based on the urban building height data, and determining an ecological resistance surface index based on the ratio between the ecological richness index and the normalized construction intensity index;

[0010] Extracting the spatial location corresponding to each plot to be urban renewed from the urban land spatial planning data, determining the urban vitality index, renovation cost index, and traffic convenience index corresponding to each plot to be urban renewed based on the spatial location 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 renovation cost index, and the traffic convenience index;

[0011] The ecological resistance surface index and the ecological return flow 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;

[0012] The selectivity and integration corresponding to each ecological corridor in the urban ecological network are determined by space syntax calculation. Based on the selectivity and integration corresponding to each ecological corridor, the key ecological corridors in the urban ecological network are selected. The ecological network after urban renewal is constructed based on the key ecological corridors to complete the construction of the urban renewal ecological network.

[0013] Optionally, the steps of selecting, from the urban land spatial planning data, patches corresponding to land areas exceeding a preset area threshold and having a land use type of woodland or water to construct a patch dataset, calculating and determining the ecosystem service value and the number of neighborhood patches corresponding to each patch in the patch dataset, and selecting patches with higher ecosystem service values ​​and fewer number of neighborhood patches as urban ecological sources include:

[0014] Determine the unit area value of the land use type of forest land or water area and the area of ​​the corresponding patch of land use type of forest land or water area in the patch dataset; and calculate and determine the ecosystem service value corresponding to each patch of land use type of forest land or water area in the patch dataset based on the product of the unit area value of the land use type of forest land or water area and the area of ​​the corresponding patch of land use type of forest land or water area in the patch dataset, wherein the ecosystem service value represents ecological importance;

[0015] Calculate and determine the proximity distance between any two spots in the spot dataset, count the number of spots within a preset distance threshold for each spot, and use the number as the number of neighborhood spots corresponding to each spot, wherein the number of neighborhood spots represents ecological scarcity;

[0016] 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.

[0017] 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 based on the normalized vegetation index and the normalized water index include:

[0018] Obtaining reflectance values ​​of the near-infrared band, the red band, and the green band in the OLI multispectral data;

[0019] calculating and determining a first difference between the reflectance value of the near-infrared band and the reflectance value of the red band, calculating and determining a first sum between the reflectance value of the near-infrared band and the reflectance value of the red band, and determining a normalized vegetation index based on a ratio between the first difference and the first sum;

[0020] calculating and determining a second difference between the reflectance value of the green band and the reflectance value of the near-infrared band, calculating and determining a second sum between the reflectance value of the green band and the reflectance value of the near-infrared band, and determining a normalized water index based on a ratio between the second difference and the second sum;

[0021] The normalized vegetation index and the normalized water index are equally weighted added to determine an ecological richness index of a preset grid size.

[0022] Optionally, the step of determining a normalized construction intensity index based on the urban building height data includes:

[0023] 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;

[0024] Calculating and determining a third sum between the highest value corresponding to the urban building height data and the lowest value corresponding to the urban building height data;

[0025] The normalized construction intensity index is determined based on a ratio between the third difference and the third sum.

[0026] Optionally, based on the spatial location corresponding to each plot of land to be urban renewed, determining the urban vitality index, renovation cost index, and traffic convenience index corresponding to each plot of land to be urban renewed, and calculating and determining the ecological return index corresponding to each plot of land to be urban renewed based on the urban vitality index, the renovation cost index, and the traffic convenience index, includes:

[0027] Obtain the POI data, surrounding housing price data and road network level corresponding to each plot to be urban renewed;

[0028] Perform kernel density analysis based on the POI data to calculate and determine the urban vitality index corresponding to each plot to be urban renewed;

[0029] 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;

[0030] Assigning scores to the road network level to determine the traffic convenience index corresponding to each plot to be urban renewed;

[0031] 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 to be urban renewed.

[0032] Optionally, the step of spatially superimposing the ecological resistance surface index and the ecological return flow index to determine a revised ecological resistance surface, and calculating and determining the connectivity paths between any urban ecological source areas based on the revised ecological resistance surface based on a preset minimum cumulative resistance model includes:

[0033] Determine an ecological resistance surface index and an ecological return flow index, and spatially overlay the ecological resistance surface index and the ecological return flow 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;

[0034] 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;

[0035] The connected path with the smallest cumulative value of the ecological resistance value is used as the connected path between any urban ecological sources.

[0036] Optionally, the step of using space syntax calculation to determine the selectivity and integration 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 corresponding to each ecological corridor, includes:

[0037] The selectivity and integration of each ecological corridor are equally weighted and summed to obtain a comprehensive evaluation index;

[0038] The ecological corridor corresponding to the highest comprehensive evaluation index is taken as the key ecological corridor in the urban ecological network.

[0039] A device for constructing an urban renewal ecological network is provided to meet another purpose of the present application, including:

[0040] an ecological source determination module configured to respond to an urban renewal ecological network construction instruction, obtain urban land spatial planning data, select from the urban land spatial planning data patches corresponding to land areas exceeding a preset area threshold and land use types of woodland or water to construct a patch dataset, calculate and determine the ecosystem service value and number of neighborhood patches corresponding to each patch in the patch dataset, and select patches with higher ecosystem service values ​​and fewer neighborhood patches as urban ecological sources;

[0041] An ecological resistance surface determination module is configured to use the OLI multispectral data and urban building height data corresponding to the urban ecological source area, 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;

[0042] an ecological return flow index determination module, configured to extract the spatial location corresponding to each land parcel to be urban renewed from the urban land spatial planning data, determine the urban vitality index, renovation cost index, and traffic convenience index corresponding to each land parcel to be urban renewed based on the spatial location 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 renovation cost index, and the traffic convenience index;

[0043] an ecological corridor determination module, configured to spatially overlay the ecological resistance surface index and the ecological return flow index to determine a modified ecological resistance surface, and calculate and determine a connection path between any urban ecological source areas 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;

[0044] 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 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.

[0045] 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.

[0046] 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, it executes the steps included in the corresponding method.

[0047] Compared with the existing technology, this application addresses the problems in the existing technology where the ecological network after urban renewal cannot pass through the old urban area and cannot provide accurate spatial guidance for the implementation of ecological restoration at key nodes in the urban renewal action in the old urban area. This application includes but is not limited to the following beneficial effects:

[0048] 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, incorporates urban renewal as a key scenario into the minimum cumulative resistance model to calculate ecological corridors. Based on the ecological return index within the urban renewal area and the ecological richness index outside the urban renewal area, it constructs the material basis for the connectivity of the ecological network of future urban scenarios. This application considers 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 by national land space planning can better meet the needs of future ecological city construction.

[0049] Secondly, the urban renewal ecological network construction method proposed in this application not only focuses on the protection of cultural heritage through urban renewal actions, but also enhances the consideration 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 equity of urban green space, but also effectively alleviate the urban heat island effect, enhance biodiversity, and improve the quality of the human living environment. This technology-driven spatial governance model is more in line with the concept of sustainable urban development and injects new vitality into the high-quality development of old urban areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] 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:

[0051] Figure 1 This is a flow chart of the method for constructing an urban renewal ecological network in an embodiment of the present application;

[0052] Figure 2 This is a flow chart of the spatial layout of the ecological network reconstruction for urban renewal in the old city in the embodiment of this application;

[0053] Figure 3 This is a principle block diagram of the urban renewal ecological network construction device in the embodiment of this application;

[0054] Figure 4 Schematic diagram of the structure of the computer device in the embodiment of the present application. DETAILED DESCRIPTION

[0055] The following describes in detail embodiments of the present application, examples of which 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 are not to be construed as limiting the present application.

[0056] It will be understood by those skilled in the art that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include the 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 intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connections or wireless couplings. The term "and / or" used herein includes all or any units and all combinations of one or more associated listed items.

[0057] 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 commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0058] It will be understood by those skilled in the art that the terms "client," "terminal," and "terminal device" as used herein include both devices that are wireless signal receivers, i.e., devices that only have wireless signal receivers without transmission capabilities, and devices that have 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 and tablet computers, which have single-line displays, multi-line displays, or cellular or other communication devices without multi-line displays; PCS (Personal Communications Service), which may combine voice, data processing, fax, and / or data communication capabilities; PDA (Personal Digital Assistant), which may include a radio frequency receiver, a pager, Internet / Intranet access, a web browser, a notepad, a calendar, and / or a GPS (Global Positioning System) receiver; and conventional laptop and / or palmtop computers or other devices, which have and / or include a radio frequency receiver. As used herein, the terms "client," "terminal," or "terminal device" may be portable, transportable, or installed in a vehicle (air, sea, and / or land), or may be adapted and / or configured to operate locally and / or in a distributed manner at any other location on Earth and / or in space. As used herein, the terms "client," "terminal," or "terminal device" may also refer to a communication terminal, an Internet terminal, or a music / video playback terminal, such as a PDA, an MID (Mobile Internet Device), and / or a mobile phone with music / video playback capabilities, or may include a smart TV, a set-top box, or other device.

[0059] The hardware referred to by names such as "server", "client", and "service node" in this application is essentially an electronic device with capabilities equivalent to those of a personal computer. It is a hardware device that has 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. Computer programs are stored in its memory, and the central processing unit loads 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.

[0060] It should be noted that the concept of "server" referred to in this application can also be extended to server clusters. Based on the network deployment principles understood by those skilled in the art, the servers described should be logically divided. In physical space, these servers can be independent of each other but callable through interfaces, or integrated into a single physical computer or a computer cluster. Those skilled in the art should understand this flexibility and should not use it to constrain the implementation of the network deployment method of this application.

[0061] 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 implementation.

[0062] Unless expressly specified otherwise, the neural network models referenced or may be referenced in this application may be deployed on a remote server and remotely called on the client, or may be deployed and directly called on a client with sufficient device capabilities. In some embodiments, when it runs on the client, its corresponding intelligence may 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.

[0063] 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 they are suitable for being called by the technical solution of this application.

[0064] Those skilled in the art should be aware that although the various methods of this application are described based on the same concept and thus exhibit commonality, unless otherwise specified, these methods can be independently executed. Similarly, the various embodiments disclosed in this application are all based on the same inventive concept. Therefore, concepts with the same expression, as well as concepts that are appropriately transformed for convenience despite different expression, should be understood as equivalent.

[0065] Unless expressly stated to be mutually exclusive, the various embodiments disclosed in this application may be cross-combined with the relevant technical features of the various embodiments to flexibly construct new embodiments, 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 resolve certain deficiencies in the prior art. Those skilled in the art should be aware of such flexibility.

[0066] See also Figure 1 as well as Figure 2 In one embodiment, the urban renewal ecological network construction method of the present application includes:

[0067] Step S10: Responding to the urban renewal ecological network construction instruction, obtaining urban land spatial planning data, selecting from the urban land spatial planning data patches corresponding to land areas exceeding a preset area threshold and land use types of woodland or water to construct a patch dataset, calculating and determining the ecosystem service value and number of neighborhood patches corresponding to each patch in the patch dataset, and selecting patches with higher ecosystem service values ​​and fewer neighborhood patches as urban ecological sources;

[0068] The computing terminal device can respond to the urban renewal ecological network construction instruction, obtain urban land spatial planning data, select from the urban land spatial planning data the corresponding spots whose land area exceeds a preset area threshold a0 and whose land use type is woodland or water to construct a spot dataset X, calculate and determine the ecosystem service value EX and the number of neighborhood spots corresponding to each spot in the spot dataset X, and use the spots with higher ecosystem service value and fewer number of neighborhood spots as urban ecological sources; the urban land spatial planning data represents spatial planning data constructed by the land plots to be urban renewed, urban buildings, woodlands, and water areas.

[0069] The steps of selecting, from the urban land spatial planning data, patches corresponding to land areas exceeding a preset area threshold and having a land use type of woodland or water to construct a patch dataset, calculating and determining the ecosystem service value and the number of neighborhood patches corresponding to each patch in the patch dataset, and selecting patches with higher ecosystem service values ​​and fewer neighborhood patches as urban ecological sources include:

[0070] Step S101: Determine the unit area value of the land use type of forest land or water area and the area of ​​the corresponding patch of land use type of forest land or water area in the patch dataset; and calculate and determine the ecosystem service value corresponding to each patch of land use type of forest land or water area in the patch dataset based on the product of the unit area value of the land use type of forest land or water area and the area of ​​the corresponding patch of land use type of forest land or water area in the patch dataset, wherein the ecosystem service value represents ecological importance;

[0071] 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:

[0072] EX(n)=e k ×A k (n),

[0073] 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 more important its ecological services are, and the higher the probability of being selected as an ecological source.

[0074] Step S103: Calculate and determine the proximity distance between any two spots in the spot dataset, count the number of spots within a preset distance threshold for each spot, and use the number as the number of neighborhood spots corresponding to each spot, wherein the number of neighborhood spots represents ecological scarcity;

[0075] Specifically, the main steps for calculating the number of neighborhood patches include:

[0076] First, use a GIS spatial proximity analysis tool to calculate the proximity distance between patch n and its neighbors. Then, consider the number of patches within a preset distance threshold, which can be set to d0. By counting the number of patches within each distance threshold, the scarcity of the corresponding ecological patch in the region can be measured. Theoretically, the fewer patches n has, the more irreplaceable it is in the region, making it a more suitable candidate for selection as an ecological source for the reconstruction of the old city's ecological network.

[0077] Step S105: Select the patches in the patch data set whose ecosystem service value exceeds the preset service value threshold and whose number of neighborhood patches is lower than the preset number threshold, and use 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.

[0078] The selection of urban ecological sources mainly adopts two searches: first, the patches whose ecosystem service value is higher than the preset service value threshold ex0 are selected from the patch dataset X, and then the patches whose number of neighbors is lower than the preset number threshold nh0 are selected from the patch dataset X. Finally, the patches that meet the above conditions are merged to obtain the urban ecological source X0.

[0079] Step S20: determining the OLI multispectral data and 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 based on 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 based on the ratio between the ecological richness index and the normalized construction intensity index;

[0080] 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 difference vegetation index (NDVI) and the normalized difference water index (NDWI) based on the OLI multispectral data, calculating and determining an ecological richness index E based on the normalized vegetation index and the normalized water index, determining a normalized construction intensity index B based on the urban building height data, and determining an ecological resistance surface index α based on the ratio between the ecological richness index E and the normalized construction intensity index B;

[0081] 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 its global coverage capability, it has become an important resource in the field of Earth observation and land remote sensing and is widely used in many fields of environmental and resource management.

[0082] Furthermore, 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:

[0083] Step S201: Obtaining the reflectance values ​​of the near-infrared band, the red band, and the green band in the OLI multispectral data;

[0084] Step S203: calculating and determining a first difference between the reflectance value of the near-infrared band and the reflectance value of the red band, calculating and determining a first sum between the reflectance value of the near-infrared band and the reflectance value of the red band, and determining a normalized vegetation index based on a ratio between the first difference and the first sum;

[0085] Step S205: calculating and determining a second difference between the reflectance value of the green band and the reflectance value of the near-infrared band, calculating and determining a second sum between the reflectance value of the green band and the reflectance value of the near-infrared band, and determining a normalized water index based on a ratio between the second difference and the second sum;

[0086] 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.

[0087] Specifically, a combined operation is performed on the near-infrared band, red band and green band of the OLI multispectral data to obtain the normalized vegetation index (NDVI) and the normalized water index (NDWI), 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 red band, and the green band, respectively.

[0088] The step of determining a normalized construction intensity index based on the urban building height data comprises:

[0089] 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;

[0090] Step S2003: calculating and determining a third sum between the highest value corresponding to the urban building height data and the lowest value corresponding to the urban building height data;

[0091] Step S2005: Determine the normalized construction intensity index based on the ratio between the third difference and the third sum.

[0092] Specifically, the construction intensity index B is mainly calculated using building height data. Building height data can be obtained from third parties such as navigation maps, or can be obtained through monitoring using LiDAR technology. The calculation formula for the normalized construction intensity index is:

[0093] B=(B max -B min ) / (B max +B min ),

[0094] Where: B max and B min They are the highest and lowest values ​​corresponding to the urban building height data respectively.

[0095] 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.

[0096] Step S30: extracting the spatial location corresponding to each plot to be urban renewed from the urban land spatial planning data; determining the urban vitality index, renovation cost index, and traffic convenience index corresponding to each plot to be urban renewed based on the spatial location; and calculating and determining the ecological return index corresponding to each plot to be urban renewed based on the urban vitality index, renovation cost index, and traffic convenience index;

[0097] After determining the ecological resistance surface index based on the ratio between the ecological richness index and the normalized construction intensity index, extracting the spatial location 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 location corresponding to each plot to be urban renewed, and calculating and determining the ecological return flow 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;

[0098] The steps of determining, based on the spatial location corresponding to each plot of land to be urban renewed, an urban vitality index, a transformation cost index, and a traffic convenience index corresponding to each plot of land to be urban renewed, and calculating and determining an ecological return index corresponding to each plot of land to be urban renewed based on the urban vitality index, the transformation cost index, and the traffic convenience index, include:

[0099] Step S301: Obtain POI data, surrounding housing price data, and road network level corresponding to each plot to be urban renewed;

[0100] 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;

[0101] Step S305: 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 a renovation cost index corresponding to each land parcel to be urban renewed;

[0102] Step S307: Calculate and assign points to the road network level to determine the traffic convenience index corresponding to each plot to be urban renewed;

[0103] 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.

[0104] 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 typically landmark locations such as commercial, cultural, social services, or other public facilities.

[0105] 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.

[0106] Step S40: spatially overlaying the ecological resistance surface index and the ecological return flow index to determine a revised ecological resistance surface; and calculating and determining, based on a preset minimum cumulative resistance model and the revised ecological resistance surface, a connection path between any urban ecological source areas, wherein the connection path represents an ecological corridor in the urban ecological network;

[0107] After calculating and determining the ecological return flow index β corresponding to each plot of land to be urban renewal based on the urban vitality index, the transformation cost index, and the traffic convenience index, the ecological resistance surface index and the ecological return flow index are spatially superimposed to determine a revised ecological resistance surface R. Based on a preset minimum cumulative resistance model, the connection path between any urban ecological source areas is calculated and determined according to the revised ecological resistance surface, wherein the connection path represents the ecological corridor in the urban ecological network;

[0108] Furthermore, the steps of spatially overlaying the ecological resistance surface index and the ecological return flow index to determine a revised ecological resistance surface, and calculating and determining the connection paths between any urban ecological source areas based on the revised ecological resistance surface based on a preset minimum cumulative resistance model include:

[0109] Step S401: determining an ecological resistance surface index and an ecological return flow index, and spatially superimposing the ecological resistance surface index and the ecological return flow 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;

[0110] Step S403: Calculate and determine the cumulative value of the ecological resistance value of each segment of the path between any urban ecological source areas based on a preset minimum cumulative resistance model;

[0111] Step S405: The connection path with the smallest cumulative value of the ecological resistance value is used as the connection path between any urban ecological sources.

[0112] Specifically, the correction of the ecological resistance surface mainly involves spatially superimposing the ecological resistance surface α and the ecological reflow coefficient β. The calculation formula for spatial superposition is:

[0113]

[0114] The connecting corridors between any urban ecological source areas 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 path of any source area on the modified ecological resistance surface R. The connecting path with the minimum cumulative value of the ecological resistance value is taken as the connecting path between any urban ecological source areas.

[0115] Step S50: Use space syntax calculation to determine the selectivity and integration corresponding to each ecological corridor in the urban ecological network, select 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.

[0116] 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.

[0117] The steps of determining the selectivity and integration corresponding to each ecological corridor in the urban ecological network by using space syntax calculation, and selecting key ecological corridors in the urban ecological network based on the selectivity and integration corresponding to each ecological corridor, include:

[0118] Step S501: perform equal-weighted summation of the selectivity and integration of each ecological corridor to obtain a comprehensive evaluation index;

[0119] Step S503: The ecological corridor corresponding to the highest comprehensive evaluation index is used as the key ecological corridor in the urban ecological network.

[0120] 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, choice and integration can be interpreted as indicators for evaluating the importance and connectivity of each corridor in the network. Choice reflects the number of other paths that can be reached around each corridor. In an ecological network, a corridor with high choice 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.

[0121] As can be seen from the above embodiments, compared with the prior art, this application addresses the problems in the prior art where the ecological network after urban renewal cannot pass through the old urban area and cannot provide accurate spatial guidance for the implementation of ecological restoration at key nodes in the urban renewal action in the old urban area. This application includes but is not limited to the following beneficial effects:

[0122] 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, incorporates urban renewal as a key scenario into the minimum cumulative resistance model to calculate ecological corridors. Based on the ecological return index within the urban renewal area and the ecological richness index outside the urban renewal area, it constructs the material basis for the connectivity of the ecological network of future urban scenarios. This application considers 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 by national land space planning can better meet the needs of future ecological city construction.

[0123] Secondly, the urban renewal ecological network construction method proposed in this application not only focuses on the protection of cultural heritage through urban renewal actions, but also enhances the consideration 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 equity of urban green space, but also effectively alleviate the urban heat island effect, enhance biodiversity, and improve the quality of the human living environment. This technology-driven spatial governance model is more in line with the concept of sustainable urban development and injects new vitality into the high-quality development of old urban areas.

[0124] See also Figure 3An urban renewal ecological network construction device provided to meet one of the purposes of this application includes an ecological source determination module 1100, an ecological resistance surface determination module 1200, an ecological return flow 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 the corresponding spots whose land area exceeds the preset area threshold and whose land use type is forest or water from the urban land space planning data 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 calculate the normalized vegetation index and normalized water index based on the OLI multispectral data corresponding to the urban ecological source, calculate and determine the ecological richness index based on the normalized vegetation index and the normalized water index, determine the ecological richness 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; the ecological return index determination module 1300 is configured to extract each spot to be replaced from the urban land space planning data The spatial position corresponding to the urban renewal plot is used to determine 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 the ecological return index corresponding to each plot to be urban renewed is calculated based on the urban vitality index, the transformation cost index and the traffic convenience index; the ecological corridor determination module 1400 is configured to spatially superimpose the ecological resistance surface index and the ecological return index to determine a revised ecological resistance surface, and to determine the connection path between any urban ecological sources based on the revised ecological resistance surface based on a preset minimum cumulative resistance model, 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.

[0125] 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 may implement a method for constructing 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 may 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 the 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 shown in the figure, or combine certain components, or have a different component arrangement.

[0126] In this embodiment, the processor is used to execute Figure 3 The memory stores the program code and various data required to execute the specific functions of each module and its submodule in the urban renewal ecological network construction device. 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. The server can call the server's program code and data to execute the functions of all submodules.

[0127] 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.

[0128] 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 urban renewal ecological network construction method described in any embodiment of the present application.

[0129] Those skilled in the art will appreciate 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. The computer program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned embodiments of the method. The aforementioned storage medium can be a computer-readable storage medium such as a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0130] The above description is only part of the implementation methods 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.

[0131] In summary, this application not only focuses on the protection of cultural heritage through urban renewal, but also enhances the planning of ecological restoration in old urban areas. During the modernization process, rebuilding ecological networks in old urban areas can not only increase the equity of urban green space, but also effectively alleviate the urban heat island effect, enhance biodiversity, and improve the quality of the human 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 an instruction to construct an urban renewal ecological network, obtain urban land spatial planning data, select from the urban land spatial planning data patches corresponding to land areas exceeding a preset area threshold and land use types of woodland or water to construct a patch dataset, calculate and determine the ecosystem service value and number of neighborhood patches corresponding to each patch in the patch dataset, and select patches with higher ecosystem service values ​​and fewer number of neighborhood patches as urban ecological source areas; Determining the OLI multispectral data and urban building height data corresponding to the urban ecological source, calculating and determining a normalized vegetation index and a normalized water index based on the OLI multispectral data, calculating and determining an ecological richness index based on the normalized vegetation index and the normalized water index, determining a normalized construction intensity index based on the urban building height data, and determining an ecological resistance surface index based on the ratio between the ecological richness index and the normalized construction intensity index; Extracting the spatial location corresponding to each plot to be urban renewed from the urban land spatial planning data, determining the urban vitality index, renovation cost index, and traffic convenience index corresponding to each plot to be urban renewed based on the spatial location 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 renovation cost index, and the traffic convenience index; The ecological resistance surface index and the ecological return flow 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 selectivity and integration corresponding to each ecological corridor in the urban ecological network are determined by space syntax calculation. Based on the selectivity and integration corresponding to each ecological corridor, the key ecological corridors in the urban ecological network are selected. 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, characterized in that: The steps of selecting, from the urban land spatial planning data, patches corresponding to land areas exceeding a preset area threshold and having a land use type of woodland or water to construct a patch dataset, calculating and determining the ecosystem service value and the number of neighborhood patches corresponding to each patch in the patch dataset, and selecting patches with higher ecosystem service values ​​and fewer neighborhood patches 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 patch of land use type of forest land or water area in the patch dataset; and calculate and determine the ecosystem service value corresponding to each patch of land use type of forest land or water area in the patch dataset based on the product of the unit area value of the land use type of forest land or water area and the area of ​​the corresponding patch of land use type of forest land or water area in the patch dataset, wherein the ecosystem service value represents ecological importance; Calculate and determine the proximity distance between any two spots in the spot dataset, count the number of spots within a preset distance threshold for each spot, and use the number 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, 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 reflectance values ​​of the near-infrared band, the red band, and the green band in the OLI multispectral data; calculating and determining a first difference between the reflectance value of the near-infrared band and the reflectance value of the red band, calculating and determining a first sum between the reflectance value of the near-infrared band and the reflectance value of the red band, and determining a normalized vegetation index based on a ratio between the first difference and the first sum; calculating and determining a second difference between the reflectance value of the green band and the reflectance value of the near-infrared band, calculating and determining a second sum between the reflectance value of the green band and the reflectance value of the near-infrared band, and determining a normalized water index based on a ratio between the second difference and the second sum; The normalized vegetation index and the normalized water 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, 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; Calculating and determining a third sum between the highest value corresponding to the urban building height data and the lowest value corresponding to the urban building height data; 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, characterized in that: The steps of determining, based on the spatial location corresponding to each plot of land to be urban renewed, an urban vitality index, a transformation cost index, and a traffic convenience index corresponding to each plot of land to be urban renewed, and calculating and determining an ecological return index corresponding to each plot of land 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; Perform 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; Assigning scores to 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 to be urban renewed.

6. The urban renewal ecological network construction method according to claim 1, 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 source areas based on the modified ecological resistance surface based on a preset minimum cumulative resistance model include: Determine an ecological resistance surface index and an ecological return flow index, and spatially overlay the ecological resistance surface index and the ecological return flow 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 urban renewal ecological network construction method according to any one of claims 1 to 6, characterized in that: The steps of determining the selectivity and integration corresponding to each ecological corridor in the urban ecological network by using space syntax calculation, and selecting key ecological corridors in the urban ecological network based on the selectivity and integration corresponding to 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 configured to respond to an urban renewal ecological network construction instruction, obtain urban land spatial planning data, select from the urban land spatial planning data patches corresponding to land areas exceeding a preset area threshold and land use types of woodland or water to construct a patch dataset, calculate and determine the ecosystem service value and number of neighborhood patches corresponding to each patch in the patch dataset, and select patches with higher ecosystem service values ​​and fewer neighborhood patches as urban ecological sources; An ecological resistance surface determination module is configured to use the OLI multispectral data and urban building height data corresponding to the urban ecological source area, 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, configured to extract the spatial location corresponding to each land parcel to be urban renewed from the urban land spatial planning data, determine the urban vitality index, renovation cost index, and traffic convenience index corresponding to each land parcel to be urban renewed based on the spatial location 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 renovation cost index, and the traffic convenience index; an ecological corridor determination module, configured to spatially overlay the ecological resistance surface index and the ecological return flow index to determine a modified ecological resistance surface, and calculate and determine a connection path between any urban ecological source areas 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; 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 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 configured to call and run a 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