Space efficiency evaluation method for three-dimensional block form

Abstract

The invention discloses a spatial efficiency evaluation method for a three-dimensional block form, and relates to the technical field of city updating, the method comprises the following steps: obtaining original map data in a given area, and extracting three-dimensional boundaries and elements of the given area from the original map data; according to the three-dimensional boundary and the elements, a three-dimensional block form model and a three-dimensional block network block model are established, and the three-dimensional block network block model comprises a network block model before public area three-dimensional space construction and a network block model after public area three-dimensional space construction; and further obtaining a spatial efficiency evaluation index of the three-dimensional block form, wherein the spatial efficiency evaluation index of the three-dimensional block form comprises a network reachable ratio, a block reachable ratio, a public spatial ratio and a spatial efficiency index. According to the invention, accurate identification of the three-dimensional city network and the block space is realized.

Description

Technical Field

[0001] The present invention relates to the field of urban renewal technology, and in particular to a method for evaluating the spatial efficiency of a three-dimensional block morphology. Background Art

[0002] As high-density urban development enters the stock renewal phase, the three-dimensional development of high-density urban space has become an important strategy for improving land use efficiency and optimizing urban resources. However, current high-density urban development faces the dual dilemmas of "three-dimensional spatial resource mismatch" and "three-dimensional network efficiency black box." Traditional two-dimensional evaluation systems are unable to analyze the spatial value transmission mechanism of three-dimensional blocks, resulting in the following three major pain points:

[0003] 1. Form-function separation: Existing methods separate the relationship between network accessibility and the economic value of functional blocks, making it impossible to quantify the contribution of public space construction to urban land appreciation.

[0004] 2. Distortion of performance evaluation: Existing technologies fail to effectively extract the performance generated by the three-dimensional network space itself, resulting in the investment benefits of public land not being effectively quantified and analyzed.

[0005] 3. Lack of decision-making basis: There is a lack of standardized three-dimensional space efficiency index and an evaluation system that takes into account both input and output of three-dimensional construction, which makes it difficult to support the precise allocation of public spaces under the concept of "smart contraction".

[0006] The existing technology has the problem that it is impossible to accurately identify three-dimensional urban networks and block spaces, and it is impossible to effectively quantify the spatial efficiency of three-dimensional urban forms in the urban design process. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a method for evaluating the spatial efficiency of three-dimensional block forms. The present invention solves the problem that the spatial efficiency of three-dimensional urban forms cannot be effectively quantitatively analyzed during urban design, and realizes the accurate identification of three-dimensional urban networks and block spaces.

[0008] The present invention adopts the following technical solutions to solve the above technical problems:

[0009] A spatial efficiency evaluation method for a three-dimensional block morphology proposed in the present invention includes:

[0010] Obtaining original map data within a given area, and extracting the three-dimensional boundaries and elements of the given area from the original map data;

[0011] Based on the three-dimensional boundaries and elements, a three-dimensional block morphological model and a three-dimensional block network block model are established. The three-dimensional block network block model includes a network block model before the construction of the public area three-dimensional space and a network block model after the construction of the public area three-dimensional space. The network block model before the construction of the public area three-dimensional space is called the development plot three-dimensional network block model, and the network block model after the construction of the public area three-dimensional space is called the overall three-dimensional network block model.

[0012] Based on the established three-dimensional block morphology model, the three-dimensional network block model of the development plot and the overall three-dimensional network block model, the spatial efficiency evaluation indicators of the three-dimensional block morphology are obtained. The spatial efficiency evaluation indicators of the three-dimensional block morphology include network accessibility ratio, block accessibility ratio, public space ratio, and spatial efficiency index.

[0013] As a further optimization scheme of the spatial efficiency evaluation method of a three-dimensional block form described in the present invention, a method for establishing a three-dimensional block form model is as follows:

[0014] Based on the three-dimensional base surface and boundaries, as well as the division of public areas and development plots in a given area, a three-dimensional block morphology model consisting of three-dimensional base surfaces and connecting nodes is established, which is abstracted from the original map data.

[0015] As a further optimization scheme for the spatial efficiency evaluation method of a three-dimensional block form described in the present invention, a method for establishing a three-dimensional block network block model is as follows:

[0016] The network and blocks in a given area are divided. Based on the division of networks and blocks, a topological analysis model is established in which the road network and building functional volume are abstracted into lines and surfaces. This topological analysis model is a three-dimensional block network block model. Based on the division of public areas and development plots in a given area, the three-dimensional block network block model is divided into a network block model before the construction of the three-dimensional space in the public area and a network block model before the construction of the three-dimensional space in the public area.

[0017] As a further optimization scheme for the spatial efficiency evaluation method of the three-dimensional block form described in the present invention, the network accessibility ratio is the ratio of the accessibility of the overall three-dimensional network to the accessibility of the three-dimensional network of the development plot. It is used to characterize the potential of the public three-dimensional network in attracting accessible pedestrian flows within the three-dimensional area and reflects the ability of the public three-dimensional network space to influence the accessibility and connection efficiency of each building space.

[0018]

[0019] in, and are the network proximity of the overall three-dimensional network block model and the three-dimensional network block model of the development plot, and are the path lengths of the overall three-dimensional network block model and the development plot three-dimensional network block model, respectively. NAR is the network accessibility ratio. A is the overall three-dimensional network block model, and B is the development plot three-dimensional network block model.

[0020] As a further optimization scheme for the spatial efficiency evaluation method of a three-dimensional block form described in the present invention, the block accessibility ratio is the ratio of the accessibility of the overall three-dimensional block to the accessibility of the three-dimensional block of the development plot, which is used to represent the level of improvement in the accessibility of the blocks within the three-dimensional area; the accessibility of the overall three-dimensional block is weighted by the block area, and the accessibility of the three-dimensional block of the development plot is weighted by the street length;

[0021]

[0022] in, and are the block proximity of the overall three-dimensional network block model and the three-dimensional network block model of the development plot, and They are the block areas of the overall three-dimensional network block model and the three-dimensional network block model of the development plot, respectively. BAR is the block accessibility ratio.

[0023] As a further optimization scheme for the spatial efficiency evaluation method of the three-dimensional block form described in the present invention, the public space ratio is the ratio of the constructed area of ​​the three-dimensional network space in the public area to the projected area of ​​the three-dimensional base surface, which is used to characterize the public network space area of ​​a unit three-dimensional area and reflect the development intensity of the public network space;

[0024]

[0025] Among them, S is the construction area of ​​the three-dimensional network space in the public area, P is the projected area of ​​the three-dimensional base surface, and PSR is the public space ratio.

[0026] As a further optimization scheme for the spatial efficiency evaluation method of the three-dimensional block form described in the present invention, the spatial efficiency index SEI is the ratio of the sum of the network accessibility ratio (NAR) and the block accessibility ratio (BAR) to the public space ratio (PSR). The spatial efficiency index comprehensively considers the input and output values ​​of public network space construction, represents the accessibility improvement value provided by a unit of public network space to the three-dimensional block, and reflects the spatial efficiency of a given three-dimensional block.

[0027]

[0028] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the computer program, the steps of the spatial efficiency evaluation method of the three-dimensional block form as described above are implemented.

[0029] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the spatial efficiency evaluation method of the three-dimensional block form as described above.

[0030] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0031] (1) The present invention solves the problem of being unable to effectively quantify the spatial efficiency of three-dimensional urban forms in the urban design process, and achieves accurate identification of three-dimensional urban networks and block spaces;

[0032] (2) Comprehensive evaluation of form-function linkage: This technical solution takes into account both network accessibility and the economic value of functional blocks, and can accurately quantify the contribution of public three-dimensional space construction to urban land value appreciation;

[0033] (3) Focus on three-dimensional efficiency evaluation: This technical solution effectively separates the efficiency generated by the three-dimensional network space itself, thereby effectively quantifying and analyzing the investment benefits of public land;

[0034] (4) Provide a comprehensive basis for decision-making: establish a standardized three-dimensional space efficiency index, establish an evaluation system that takes into account both input and output of three-dimensional construction, and support the precise deployment of public spaces under the concept of “smart contraction”. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A summary map of the determined three-dimensional research boundary and related three-dimensional elements (dwg format);

[0036] Figure 2 A 3D block morphology model is generated based on data modeling after identifying the boundaries of the 3D block;

[0037] Figure 3 Developing a parcel grid model for a three-dimensional block modeled based on the morphological model and related data;

[0038] Figure 4 A three-dimensional block overall network model based on the morphological model and related data;

[0039] Figure 5a 、 Figure 5b These are distribution maps showing the network accessibility results before and after the construction of the three-dimensional network in the public area of ​​the Central District;

[0040] Figure 6a 、 Figure 6b These are distribution maps showing the block accessibility results before and after the construction of the public area three-dimensional network in the Central area;

[0041] Figure 7 This is a list of the calculated results of the road network proximity, road length, etc. in the Central Area;

[0042] Figure 8 Flowchart of the present invention. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Figure 8 The flowchart of the present invention is a method for evaluating the spatial efficiency of a three-dimensional block form, comprising:

[0045] Obtaining original map data within a given area, and extracting the three-dimensional boundaries and elements of the given area from the original map data;

[0046] Based on the three-dimensional boundaries and elements, a three-dimensional block morphological model and a three-dimensional block network block model are established. The three-dimensional block network block model includes a network block model before the construction of the public area three-dimensional space and a network block model after the construction of the public area three-dimensional space. The network block model before the construction of the public area three-dimensional space is called the development plot three-dimensional network block model, and the network block model after the construction of the public area three-dimensional space is called the overall three-dimensional network block model.

[0047] Based on the established three-dimensional block morphology model, the three-dimensional network block model of the development plot and the overall three-dimensional network block model, the spatial efficiency evaluation indicators of the three-dimensional block morphology are obtained. The spatial efficiency evaluation indicators of the three-dimensional block morphology include network accessibility ratio, block accessibility ratio, public space ratio, and spatial efficiency index.

[0048] The principles of three-dimensional urban element identification and spatial efficiency calculation are as follows;

[0049] 1.1 Identify the characteristic elements of three-dimensional urban form:

[0050] 1.1.1 Ground and Base: The "ground layer" is defined as the original natural terrain surface, or the surface of artificial structures that have been transformed and integrated into the natural terrain. The "base" refers to the base surface that supports public activities and functions. In a three-dimensional city, in addition to the ground as the base surface, three-dimensional base surfaces in the air and underground are also derived, increasing the vertical dimension to accommodate public activities.

[0051] 1.1.2 Public Areas and Development Land: Public land such as roads, squares, and green spaces, and development plots and the buildings within them, constitute the permanent urban form. Generally speaking, the former is built by the government and its development platforms and assumes more public functions, while the latter is built by developers and has a relatively low degree of publicness. However, the division of labor in a three-dimensional city does not follow the principle of planar division. The development of land occupied by or adjacent to train stations, tracks, and bus stations often requires the government and its development platforms to lead the construction. Land and buildings owned by private developers often contribute some space to the city, so development plots also have strong public service functions.

[0052] 1.1.3 Three-dimensional base and connection nodes: The three-dimensional base is the premise for judging whether an urban area is three-dimensional, and both public areas and development land can bear the responsibility of constructing the three-dimensional base. Its establishment requires the following:

[0053] 1) It must be a continuous space that is off the ground and completely public;

[0054] 2) Connecting two or more blocks (areas enclosed by urban municipal roads) or two or more development plots through non-ground layers.

[0055] Connection nodes are the elements that establish spatial connections between different base surfaces. The more connection nodes there are per unit area, the higher the connection efficiency of the base surface.

[0056] 1.1.4 Networks and Blocks: Networks and blocks are abstract expressions of the inherent logic and texture of urban form. Networked spaces are key pathways within a city, connecting various blocks and facilitating the flow of materials and information. These are manifested in transportation networks, green corridors, water systems, and public infrastructure chains. Blocked spaces are the basic units of urban material space, including regions, cities, blocks, plots of land, and even buildings. These are relatively fixed and carry specific functions of urban life and production. In this technology, a block is the smallest functional spatial unit within or outside a building, such as commercial activity areas within a complex, connecting corridors, or shops on underground streets.

[0057] 1.1.5 Three-Dimensional Network Space: Planar network space encompasses public walkable areas on the ground, such as sidewalks, zebra crossings, pedestrian streets, and internal roads on public land. Three-dimensional network space encompasses public urban walkable areas on aerial or underground three-dimensional surfaces. It generally falls into the following three categories: 1. Aerial or underground roads connected within public land, such as underground commercial areas and skywalks. 2. Indoor and outdoor urban roads on three-dimensional surfaces, such as the indoor paths of connected two-story shopping malls and the road network formed by outdoor building platforms. 3. Vertical nodes connecting three-dimensional surfaces, such as escalators, elevators, stairs, ramps, and terraces.

[0058] 1.2 Establishing spatial efficiency measurement indicators for three-dimensional cities:

[0059] Based on the identification of three-dimensional urban block morphological elements, a measurement index and evaluation system for morphological space efficiency is established:

[0060] 1.2.1 Reachability calculation:

[0061] Closeness measures the total distance cost required to travel from a starting point to any other location within a certain radius, reflecting the accessibility of a street / block, that is, the potential of the street / block to attract arrival-oriented traffic.

[0062] Network proximity C n :

[0063]

[0064] Where: x is the road segment to be calculated; Rx is the set of other road segments that can be reached within a given radius R starting from road segment x; d(x,y) is the shortest distance from road segment x to road segment y.

[0065] Block proximity C b :

[0066]

[0067] Where: i is the block to be calculated; Ri is the set of other road segments that can be reached within a given radius R starting from block i; and d(i, j) is the shortest distance from block i to road segment j along the road network.

[0068] 1.2.2 Effectiveness measurement index:

[0069] 1) Network Accessibility Ratio: The Network Accessibility Ratio is the ratio of the accessibility of the overall three-dimensional network to the accessibility of the three-dimensional network of the development site. It represents the potential of the public three-dimensional network within the three-dimensional area to attract accessible pedestrian flows and reflects the ability of the public three-dimensional network space to influence the accessibility and connection efficiency of each building space. Because longer roads have a greater impact on the overall road network, the accessibility of the three-dimensional network is the product of the proximity of each path and the corresponding path length. The calculation formula is:

[0070]

[0071] in, and are the network proximity of the overall three-dimensional network model and the three-dimensional network model of the development plot, and They are the path lengths of the overall network model and the development plot network model respectively.

[0072] 2) Block Accessibility Ratio: The Block Accessibility Ratio is the ratio of the accessibility of the entire 3D block (weighted block area) to the accessibility of the 3D block of the development site (weighted street length), representing the level of improvement in the accessibility of the blocks within the 3D area. Considering that larger blocks have a greater impact on the overall area, the accessibility of the 3D block is the product of each block's proximity and the corresponding block area. The calculation formula is:

[0073]

[0074] in, and are the block proximity of the overall three-dimensional network model and the development plot network model, and They are the block areas of the overall network model and the development plot network model respectively.

[0075] 3) Public Space Ratio: The Public Space Ratio is the ratio of the area of ​​the public network space to the area of ​​the three-dimensional area. It represents the area of ​​the public network space per three-dimensional area and reflects the development intensity of the public network space. The calculation formula is:

[0076]

[0077] Among them, S is the construction area of ​​the three-dimensional network space in the public area, and P is the projection area of ​​the three-dimensional base surface.

[0078] 4) Spatial Efficiency Index: The Spatial Efficiency Index is the ratio of the sum of the Network Accessibility Ratio (NAR) and the Block Accessibility Ratio (BAR) to the Public Space Ratio (PSR). The Spatial Efficiency Index comprehensively considers the input and output of public network space construction, representing the accessibility improvement value that a unit of public network space can provide to the three-dimensional area, reflecting the spatial efficiency of the three-dimensional block. The calculation formula is:

[0079]

[0080] Taking the spatial efficiency calculation of the three-dimensional urban form in Hong Kong’s Central area as an example:

[0081] 1. Determine the boundaries of three-dimensional blocks and obtain original data: First, through satellite maps, field surveys and visits, etc., define the research boundaries, including the spatial information of public plots and development plots. The three-dimensional urban research boundary is determined by connecting the three-dimensional base surface. The three-dimensional base surface is in the underground layer or the air layer (not the ground layer), forming a continuous urban public space system. The plots connected to it are included in the research scope. Then, through field surveys and mapping, downloading online map services (such as cadmapper, openstreetmap, etc.), obtain the original map data of the required research scope, such as Figure 1 shown.

[0082] 2. Screen and process data formats to establish spatial morphology models and network block models: Screen and process the original map data to extract the information required for 3D modeling. Aggregate all information into a DWG format map and perform 3D city modeling in Rhino. Based on the identification of 3D elements, divide the modeling layers into 3D base surfaces, horizontal links, etc., and establish a spatial morphology model, such as Figure 2 As shown. Based on the spatial morphology model, a topological analysis model is established that abstracts the road network and building functional volume into lines and surfaces. This topological analysis model is a three-dimensional block network block model. Based on the division of public areas and development plots in a given area, the three-dimensional block network block model is divided into a development plot three-dimensional network block model and an overall three-dimensional network block model, as shown in Figure 3 、 4 shown.

[0083] 3. Calculate spatial efficiency indicators: After completing the three-dimensional urban form and network block model, the three-dimensional characteristic measurement indicators can be calculated based on the three-dimensional urban spatial efficiency indicator calculation principles in part 1.2.

[0084] (1) Calculate network proximity C n , where d(x,y) is the shortest distance from segment x to segment y.

[0085] (2) Calculate block proximity C b , where d(i,j) is the shortest distance from block i to road segment j along the road network.

[0086] (3) Calculate the ratio of the area of ​​the constructed three-dimensional network space in the public area to the area of ​​the three-dimensional area - the public space ratio (PSR) as an investment indicator.

[0087] (4) According to the network proximity C n and block proximity C b , calculate the network accessibility ratio (NAR) and block accessibility ratio (BAR), and sum them to get the output value. The ratio of the output value to the input index PSR is the spatial efficiency index (SEI) of the three-dimensional block. The calculation results are as follows: Figure 5a、 Figure 5b 、 Figure 6a 、 Figure 6b and 7 As shown, Figure 5a 、 Figure 5b In the middle, warm to cold colors represent high to low walkability; Figure 6a 、 Figure 6b The colors from warm to cool represent high to low walkability.

[0088] (5) According to the above steps, the network accessibility ratio (NAR) of the middle ring area is calculated to be 1.31, the block accessibility ratio (BAR) is 1.37, the public space ratio (PSR) is 0.23, and the space efficiency index (SEI) is 11.65.

[0089] 4. Apply 3D spatial efficiency evaluation indicators to conduct comparative evaluations of design solutions or case studies: Measure 3D evaluation data from multiple cases to build a 3D city database. This allows for horizontal comparisons of existing 3D city cases, as well as vertical comparisons of 3D city designs before and after updates, to evaluate update plans.

[0090] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the computer program, the steps of the spatial efficiency evaluation method of the three-dimensional block form as described above are implemented.

[0091] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the spatial efficiency evaluation method of the three-dimensional block form as described above.

[0092] It will be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention may be implemented in various computer languages, for example, the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0093] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0094] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0095] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0096] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0097] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A spatial efficiency evaluation method for three-dimensional block morphology, characterized by: include: Obtaining original map data within a given area, and extracting the three-dimensional boundaries and elements of the given area from the original map data; Based on the three-dimensional boundaries and elements, a three-dimensional block morphological model and a three-dimensional block network block model are established. The three-dimensional block network block model includes a network block model before the construction of the public area three-dimensional space and a network block model after the construction of the public area three-dimensional space. The network block model before the construction of the public area three-dimensional space is called the development plot three-dimensional network block model, and the network block model after the construction of the public area three-dimensional space is called the overall three-dimensional network block model. Based on the established three-dimensional block morphology model, the three-dimensional network block model of the development plot and the overall three-dimensional network block model, the spatial efficiency evaluation indicators of the three-dimensional block morphology are obtained. The spatial efficiency evaluation indicators of the three-dimensional block morphology include network accessibility ratio, block accessibility ratio, public space ratio, and spatial efficiency index.

2. The spatial efficiency evaluation method of a three-dimensional block form according to claim 1 is characterized in that: The method of establishing a three-dimensional block morphology model is as follows: Based on the three-dimensional base surface and boundaries, as well as the division of public areas and development plots in a given area, a three-dimensional block morphology model consisting of three-dimensional base surfaces and connecting nodes is established, which is abstracted from the original map data.

3. The spatial efficiency evaluation method of a three-dimensional block form according to claim 2 is characterized in that: The method of establishing a three-dimensional block network block model is: The network and blocks in a given area are divided. Based on the division of networks and blocks, a topological analysis model is established in which the road network and building functional volume are abstracted into lines and surfaces. This topological analysis model is a three-dimensional block network block model. Based on the division of public areas and development plots in a given area, the three-dimensional block network block model is divided into a network block model before the construction of the three-dimensional space in the public area and a network block model before the construction of the three-dimensional space in the public area.

4. The spatial efficiency evaluation method of a three-dimensional block form according to claim 1 is characterized in that: The network accessibility ratio is the ratio of the accessibility of the overall three-dimensional network to the accessibility of the three-dimensional network of the development site. It is used to represent the potential of the public three-dimensional network in attracting accessible pedestrian flows within the three-dimensional area, and reflects the ability of the public three-dimensional network space to influence the accessibility and connection efficiency of each building space. in, and are the network proximity of the overall three-dimensional network block model and the three-dimensional network block model of the development plot, and are the path lengths of the overall three-dimensional network block model and the development plot three-dimensional network block model, respectively. NAR is the network accessibility ratio. A is the overall three-dimensional network block model, and B is the development plot three-dimensional network block model.

5. The spatial efficiency evaluation method of a three-dimensional block form according to claim 1 is characterized in that: The block accessibility ratio is the ratio of the accessibility of the overall three-dimensional block to the accessibility of the three-dimensional block of the development plot, which is used to represent the level of improvement in the accessibility of the blocks in the three-dimensional area. The accessibility of the overall three-dimensional block is weighted by the block area, while the accessibility of the three-dimensional block of the development plot is weighted by the street length. in, and are the block proximity of the overall three-dimensional network block model and the three-dimensional network block model of the development plot, and are the block areas of the overall three-dimensional network block model and the three-dimensional network block model of the development plot, respectively. BAR is the block accessibility ratio.

6. The spatial efficiency evaluation method of a three-dimensional block form according to claim 1 is characterized in that: The public space ratio is the ratio of the constructed area of ​​the public area's three-dimensional network space to the projected area of ​​the three-dimensional base surface. It is used to characterize the public network space area per unit three-dimensional area and reflect the development intensity of the public network space. Among them, S is the construction area of ​​the three-dimensional network space in the public area, P is the projected area of ​​the three-dimensional base surface, and PSR is the public space ratio.

7. The spatial efficiency evaluation method of a three-dimensional block form according to claim 1 is characterized in that: The space efficiency index SEI is the ratio of the sum of the network accessibility ratio NAR and the block accessibility ratio BAR to the public space ratio PSR; The spatial efficiency index comprehensively considers the input and output values ​​of public network space construction, characterizes the accessibility improvement value provided by a unit of public network space to a three-dimensional block, and reflects the spatial efficiency of a given three-dimensional block.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: When the processor executes the computer program, the steps of the spatial efficiency evaluation method of the three-dimensional block form as described in any one of claims 1 to 7 are implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the spatial efficiency evaluation method of the three-dimensional block form as described in any one of claims 1 to 7 are implemented.

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