A method, device, equipment and medium for finely defining a walking range

Abstract

The present invention discloses a method, device, equipment and medium for fine definition of walking reachable range, which relates to the technical field of land space planning. The method comprises: based on geographic entity data, generating a preliminary reachable range surface set of public service facilities to be measured; correcting a single reachable range surface that runs through a building in the preliminary reachable range surface set to obtain a corrected reachable range surface set; regularizing the edge area of ​​a single reachable range surface with irregular boundaries in the preliminary reachable range surface set to obtain result data of regularized delineation of the reachable range surface edge; performing spatial fusion calculation on the corrected reachable range surface set according to the result data of regularized delineation of the reachable range surface edge, generating a complete reachable range surface of the public service facilities to be measured, and completing the fine definition of the reachable range surface. The present invention can realize the fine definition of the reachable range surface, and provide scientific and effective technical support for urban planning and urban renewal construction.

Description

Technical Field

[0001] The present invention relates to the technical field of national land space planning, and in particular to a method, device, equipment and medium for finely defining a walkable range. Background Art

[0002] Urban public service facilities are the spatial carriers of modern urban public services, aiming to provide necessary social services for urban residents. The accessibility of public service facilities can not only reflect the difficulty of urban residents using different modes of transportation to approach urban public service facilities and obtain urban public services, but also well reflect the rationality of the distribution of public service facilities in urban land space planning. Therefore, how to accurately define the walking range of public service facilities is particularly critical, and the construction of the accessible range surface model based on road network data has become a technical problem that needs to be solved. The walking range refers to the spatial range composed of the end points that can be reached after a certain time or distance starting from a certain type of public service facility. Since the generation of the traditional walking range surface ignores the integrity of the geographical entity, the spatial distribution of the accessible range surface is irregular, which cannot accurately reflect the accessibility of the complete space. Especially in the process of conducting accessibility analysis and evaluation of urban public service facilities, the refinement of accessibility of the "quarter-hour living circle" has reached the courtyard level, or even the level of building entities. Therefore, the accessible range analysis is not only about generating the accessible range surface, but also about refining the accessible range surface. Refining the walking accessible range is an important part of the accessible range analysis, which provides a feasible reference for the refined new national land space planning and plays a practical application effect in actual social development and planning.

[0003] At present, the analysis of walking range mainly focuses on the use of technical means to generate the accessible range surface, such as the nearest distance method, network analysis method, and buffer zone analysis method. In the existing research methods, the accessible range analysis does not consider the actual courtyard boundaries, entrances and exits, and courtyard gates that can be reached on foot, which involve actual walking traffic conditions. There is a lack of regularized and refined processing of the walking range surface, and it is impossible to accurately define the walking range. How to propose a method for constructing a refined definition of the accessible range based on the actual pedestrian traffic accessibility, so that the walking range can accurately reflect the actual service space scope of public service facilities and be actually applied in urban planning and urban renewal is a problem that technicians in this field urgently need to solve. Summary of the invention

[0004] The purpose of the present invention is to provide a method, device, equipment and medium for finely defining a walkable range, which can achieve fine definition of the walkable range.

[0005] To achieve the above object, the present invention provides the following solution.

[0006] In a first aspect, the present invention provides a method for finely defining a walking range, and the method for finely defining a walking range includes:

[0007] Based on geographic entity data, a preliminary reachable range surface set of the public service facilities to be measured is generated; the geographic entity data includes: geographic entity data of transportation facilities and entity data of hospital gates and hospital walls.

[0008] A single reachable range surface that passes through the building in the preliminary reachable range surface set is corrected to obtain a corrected reachable range surface set.

[0009] Regularization is performed on the edge area of ​​a single reachable range surface with irregular boundaries in the preliminary reachable range surface set to obtain result data of the regularization delineation of the edge of the reachable range surface.

[0010] According to the result data of the regular delineation of the edge of the reachable range surface, spatial fusion calculation is performed on the revised reachable range surface set to generate a complete reachable range surface for the public service facility to be measured, thereby completing the refined definition of the reachable range surface.

[0011] In a second aspect, the present invention provides a device for finely defining a walkable range, and the device for finely defining a walkable range includes.

[0012] The module for generating a preliminary reachable range surface set is used to generate a preliminary reachable range surface set of the public service facilities to be measured based on geographic entity data; the geographic entity data includes: geographic entity data of transportation facilities and entity data of hospital gates and hospital walls.

[0013] The correction module is used to correct a single reachable range surface that passes through the building in the preliminary reachable range surface set to obtain a corrected reachable range surface set.

[0014] The regularization delineation module is used to perform regularization delineation on the edge area of ​​a single reachable range surface with irregular boundaries in the preliminary reachable range surface set to obtain result data of the regularization delineation of the edge of the reachable range surface.

[0015] The spatial fusion calculation module is used to perform spatial fusion calculation on the revised reachable range surface set according to the result data of the regular delineation of the edge of the reachable range surface, generate a complete reachable range surface of the public service facility to be measured, and complete the refined definition of the reachable range surface.

[0016] In a third aspect, the present invention provides a computer device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement any of the above-described methods for finely defining a walkable range.

[0017] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for finely defining a walkable range.

[0018] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects.

[0019] The present invention provides a method, device, equipment and medium for fine definition of walking reachable range. First, based on geographic entity data, a preliminary reachable range surface set of the public service facilities to be measured is generated; secondly, a single reachable range surface that passes through the building in the preliminary reachable range surface set is corrected to obtain a corrected reachable range surface set; furthermore, the edge area of ​​a single reachable range surface with irregular boundaries in the preliminary reachable range surface set is regularized to obtain the result data of the regularized delineation of the reachable range surface edge; finally, according to the result data of the regularized delineation of the reachable range surface edge, the corrected reachable range surface set is spatially fused and calculated to generate a complete reachable range surface of the public service facilities to be measured, and the reachable range surface is finely defined. The present invention can finely delineate the reachable range, provide a more accurate measurement method for the accessibility analysis and evaluation of community urban public service facilities and the delineation of the "quarter-hour living circle", and provide scientific and effective technical support for urban planning and urban renewal construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a diagram of the application environment of a method for finely defining a walkable range in one embodiment of the present invention.

[0022] Figure 2 A flowchart of a method for finely defining a walkable range is provided in accordance with an embodiment of the present invention.

[0023] Figure 3 A schematic diagram of a detailed flow chart of a method for finely defining a reachable range surface provided in one embodiment of the present invention.

[0024] Figure 4 A schematic diagram of the semantic association of geographic entities provided by an embodiment of the present invention.

[0025] Figure 5A schematic diagram of the correction of the accessible range of a single-family building provided in one embodiment of the present invention.

[0026] Figure 6 A schematic diagram of surface correction of the accessible range of courtyard buildings provided in one embodiment of the present invention.

[0027] Figure 7 A schematic diagram of surface correction of the accessible range of an open space provided by an embodiment of the present invention.

[0028] Figure 8 A schematic diagram of regularized delineation of the edge of a reachable range surface based on a road centerline provided in one embodiment of the present invention.

[0029] Fig. 9 A schematic diagram of regular delineation of the edge of a reachable range surface based on a courtyard boundary provided in one embodiment of the present invention.

[0030] Fig.10 A schematic diagram of regular delineation of the edge of a reachable range surface based on a plot boundary provided in one embodiment of the present invention.

[0031] Fig.11 A fusion diagram of a set of reachable range surfaces of a certain type of public service facilities to be measured provided in one embodiment of the present invention.

[0032] Fig.12 A schematic diagram of functional modules of a device for finely defining a walking range provided in one embodiment of the present invention.

[0033] Fig.13 A schematic diagram of the structure of a computer device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] In view of the shortcomings of the existing technical methods for constructing the walkable range, the present invention provides a method for fine-grained definition of the walkable range, which relies on geographic entity data to generate a preliminary reachable range surface set of a certain type of public service facility to be measured; based on the location information of the entrances and exits of the building, the gates accessible by the pedestrian walkway, and the reachable range coverage, a single reachable range surface that runs through the building is corrected; based on the center line of the road, the boundary of the courtyard, and the boundary of the plot, the edge area of ​​the single reachable range surface is regularly delineated; the reachable range surface set is fused to generate a complete reachable range surface of a certain type of public service facility to be measured.

[0037] The method for finely defining the walkable range provided in the embodiment of the present invention can be applied to: Figure 1 In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be set up separately, integrated on the server 104, or placed on the cloud or other servers. The terminal 102 can send geographic entity data to the server 104, and the geographic entity data includes: geographic entity data of transportation facilities and entity data of courtyard gates and courtyards; after the server 104 receives the geographic entity data, for the geographic entity data, the server 104 generates a preliminary reachable range surface set of the public service facilities to be measured based on the geographic entity data; the single reachable range surface that runs through the building in the preliminary reachable range surface set is corrected to obtain a corrected reachable range surface set; the edge area of ​​the single reachable range surface with irregular boundaries in the preliminary reachable range surface set is regularized to obtain the result data of the regularized delineation of the reachable range surface edge; according to the result data of the regularized delineation of the reachable range surface edge, the corrected reachable range surface set is spatially fused and calculated to generate a complete reachable range surface of the public service facilities to be measured, and the refined definition of the reachable range surface is completed. The server 104 can feed back the obtained complete reachable range of the public service facilities to be measured to the terminal 102. In addition, in some embodiments, the method for finely defining the reachable range on foot can also be implemented by the server 104 or the terminal 102 alone, such as the terminal 102 can directly perform fine definition of the reachable range for the geographic entity data, or the server 104 can obtain the geographic entity data from the data storage system and perform fine definition of the reachable range for the geographic entity data.

[0038] The terminal 102 may be, but is not limited to, various desktop computers, laptop computers, smart phones, and tablet computers. The server 104 may be implemented as an independent server or a server cluster consisting of multiple servers, or may be a cloud server.

[0039] In an exemplary embodiment, Figure 2As shown, a method for finely defining a walkable range is provided. The method is executed by a computer device, and can be executed by a computer device such as a terminal or a server alone, or by a terminal and a server together. In an embodiment of the present invention, the method is applied to Figure 1 The server 104 in the example is used for explanation, and the steps include the following steps S1 to S4.

[0040] S1: Generate a preliminary reachable range surface set of the public service facilities to be measured based on geographic entity data; the geographic entity data includes: geographic entity data of transportation facilities and entity data of hospital gates and hospital walls.

[0041] S2: Modify a single reachable range surface that passes through the building in the preliminary reachable range surface set to obtain a modified reachable range surface set.

[0042] S3: Regularizing the edge area of ​​a single reachable range surface with irregular boundaries in the preliminary reachable range surface set to obtain result data of the regularized delineation of the reachable range surface edge.

[0043] S4: Based on the result data of the regular delineation of the edge of the reachable range surface, spatial fusion calculation is performed on the revised reachable range surface set to generate a complete reachable range surface of the public service facility to be measured, thereby completing the refined definition of the reachable range surface.

[0044] By implementing the above steps S1 to S4, the accessible range can be precisely delineated, providing a more accurate measurement method for the accessibility analysis and evaluation of community urban public service facilities and the delineation of the "15-minute living circle", and providing scientific and effective technical support for urban planning and urban renewal construction.

[0045] like Figure 3 As shown, the present invention provides a method for fine-grained definition of the walking reachable range based on geographic entities. Relying on geographic entity data, data processing is performed according to spatial relationships, and a preliminary reachable range surface set of a certain type of public service facility to be measured is generated through road network analysis; by judging the location information of the entrances and exits of buildings and the courtyard gates accessible by pedestrian paths, the expansion corrosion coefficient is calculated according to the coverage threshold of the geographic entity of the reachable range, and the single reachable range surface that passes through the building is corrected; based on the center line of the road, the boundary of the courtyard, and the boundary of the plot, the edge area of ​​the single reachable range surface is regularized and delineated; the reachable range surface set is fused to generate a complete reachable range surface of a certain type of public service facility to be measured, and the reachable range surface is fine-grained defined.

[0046] As an optional implementation, in step S1, based on the geographical entities of transportation facilities and the volume data of gates and courtyards, a preliminary reachable range surface set of a certain type of public service facilities to be measured is generated, specifically including.

[0047] S11: Based on the spatial relationship between the geographic entity data of transportation facilities and the walking accessibility of the gate and courtyard entity data, the spatial relationship between geographic entities is judged to construct an actual walking accessible road network dataset.

[0048] Specifically, based on the road entities and gate entities in a city's geographic entities, the center lines of the city road entities and internal road entities (generally surface data) are extracted, and the road center lines are connected to ensure road connectivity. Based on the spatial relationship between the entities, the gate and road data are semantically associated and integrated through the spatial relationship between the city road center line and the internal road center line, the gate entity and the courtyard entity, and the road center line and the gate entity, to construct a road network dataset that is actually accessible on foot, such as Figure 4 shown.

[0049] S12: Based on the POI data, the types of public service facilities to be measured are screened out; and the public service facility points of the same type are merged into the same layer to obtain a set of public service facility points to be measured.

[0050] Specifically, based on the POI data of a city, the types of public service facilities to be measured (such as life services, administrative offices, education and scientific research, medical and health care, transportation facilities, cultural and sports activities, green spaces and squares, etc., which can reflect similar travel purposes) are screened out, as shown in Table 1. The public service facilities of the same type are fused into the same layer to form a set of public service facilities to be measured, and the reachable range analysis of the set of public service facilities to be measured is carried out.

[0051] Table 1 Selection of indicators for public service facilities

[0052]

[0053] S13: Based on the spatial relationship and semantic relationship between the actual accessible road network dataset and the set of public service facilities to be measured, the geographic entity data of transportation facilities are associated and fused with the gate and courtyard entity data corresponding to the set of public service facilities to be measured, so as to obtain the road network dataset after multi-source data fusion processing.

[0054] Specifically, combined with the actual pedestrian accessible road network dataset initially constructed in step S11, based on the spatial and semantic relationships between the road network data and the set of public service facility points to be measured, the geographic entity data of the transportation facilities and the corresponding gate and courtyard data in the set of public service facility points to be measured are associated and fused to complete the fusion processing of multi-source data, which is used as the data basis for the subsequent generation of accessible range surfaces.

[0055] S14: According to the road network dataset processed by the fusion of multi-source data and the type of the public service facility to be measured, the travel time and distance thresholds are set, and a network analysis method that takes into account the age of the walking crowd and the terrain slope is used to generate a preliminary reachable range surface set with the gate of the point of interest as the starting point and the end of the time and distance threshold as the end point.

[0056] Specifically, relying on the road network dataset obtained after multi-source data fusion processing in step S13, the travel time and distance thresholds are set according to the type of public service facilities to be measured, and the network analysis method that takes into account the age of the walking population and the terrain slope is used to generate a preliminary reachable range surface with the gate of the public service facility as the starting point and the end of the time and distance threshold as the end point.

[0057] In another exemplary embodiment of the present invention, in step S2, the position of a single reachable range surface passing through the building is corrected by taking into account the location information of the entrances and exits of the building, the gates accessible by the pedestrian walkway, and the coverage rate of the reachable range surface on the building, including specifically including.

[0058] S21: According to the field attributes of the gate entity, filter out the gate entity data that can be passed by pedestrians.

[0059] Specifically, relying on the gate entity data in a city's geographic entity, the gate entities that are accessible to pedestrians are screened out according to the field attributes of the gate entities (traffic nature = 'pedestrian' OR traffic nature = 'mixed' OR traffic nature = 'NULL'), as shown in Table 2, as the determination factor for the subsequent correction of the position of a single reachable range surface.

[0060] Table 2. Attribute table of gate data (partial)

[0061]

[0062] S22: Based on the physical data of the pedestrian accessible courtyard gate, the entrance and exit of the single-family building and the coverage rate of the accessible range facing the single-family building are used as determination factors for the correction of the accessible range surface of the single-family building. A threshold for the coverage rate of the accessible range facing the single-family building is set, and the expansion and corrosion coefficient of the accessible range facing the single-family building is determined. Through the spatial relationship and the expansion and corrosion coefficient of the accessible range facing the single-family building, the position correction of the accessible range surface of the single-family building is achieved.

[0063] S23: Based on the physical data of the courtyard gate accessible to pedestrians, the courtyard gate accessible by the pedestrian walkway, the location of the building entrances and exits, and the coverage rate of the accessible range facing the buildings in the courtyard are used as determination factors for the correction of the accessible range surface of the buildings in the courtyard. A threshold value of the coverage rate of the accessible range facing the courtyard buildings is set, and the expansion and corrosion coefficient of the accessible range facing the buildings in the courtyard is determined. Through the spatial relationship and the expansion and corrosion coefficient of the accessible range facing the buildings in the courtyard, the position correction of the accessible range surface of the buildings in the courtyard is achieved.

[0064] S24: For open space, according to the current land use data, the boundary of the plot is obtained, the coverage threshold of the accessible range facing the open space is set, the expansion and corrosion coefficient of the accessible range facing the open space is determined, and the position of the accessible range surface of the open space is corrected through the expansion and corrosion coefficient of the accessible range facing the open space; the open space is a non-enclosed space other than single-family buildings and courtyards.

[0065] S25: Obtain a corrected reachable range surface set according to the corrected reachable range surface position of the single-family building, the corrected reachable range surface position of the building in the courtyard, and the corrected reachable range surface position of the open space.

[0066] In another exemplary embodiment of the present invention, in step S22, relying on the physical data of the pedestrian accessible courtyard gate obtained in step S21, the entrance and exit positions of the building entity and the coverage rate of the accessible range surface on the building entity are used as the determination factors for the division of the single-family building surface, and the coverage rate threshold of the accessible range surface on the single-family building is set to 50%. The expansion corrosion coefficient of the accessible range surface on the building is calculated. First, it is determined whether the entrance and exit positions of the building are located within the accessible range surface. If the result is not established, the building is unreachable; if the result is established, it is further determined whether the expansion corrosion coefficient Y of the building is 1. If the result is not established, the building is unreachable; if the result is established, the building is accessible. According to the result of the judgment on whether the building is reachable, the accessible building is completely included in the accessible range surface along the building boundary, and the inaccessible building is removed from the accessible range surface, thereby completing the position correction of the accessible range surface of the single-family building, such as Figure 5 shown.

[0067] (1).

[0068] Where: represents the area of ​​the reachable range. Represents the area of ​​the building, The value of is the coverage rate of the reachable range, Indicates the reachable range coverage threshold, Represents the expansion corrosion coefficient.

[0069] Specifically, in step S22, the position of the reachable range surface of the single-family building is corrected, including:

[0070] S221: Determine whether the entrance and exit of the single-family building is within the accessible range based on the physical data of the pedestrian-accessible gate, and obtain a first determination result.

[0071] S222: If the first judgment result is no, the building is unreachable.

[0072] S223: If the first judgment result is yes, then calculate the expansion corrosion coefficient of the reachable range facing the single-family building, and determine whether the expansion corrosion coefficient of the reachable range facing the single-family building is 1, to obtain a second judgment result.

[0073] S224: If the second judgment result is no, the building is unreachable.

[0074] S225: If the second judgment result is yes, the building is reachable.

[0075] S226: The accessible buildings are completely included in the accessible range surface along the building boundaries, and the unreachable buildings are excluded from the accessible range surface, so as to complete the position correction of the accessible range surface of the single-family building.

[0076] In another exemplary embodiment of the present invention, in step S23, relying on the physical data of the courtyard gate accessible to pedestrians obtained in step S21, the courtyard gate accessible by the pedestrian path, the location of the building entrance and exit, and the coverage rate of the buildings in the courtyard facing the accessible range are used as the determination factors for the division of the courtyard building surface, and the coverage rate threshold of the buildings in the courtyard facing the accessible range is set to 50%, and the expansion corrosion coefficient of the buildings in the courtyard facing the accessible range is calculated. First, it is determined whether the location of the courtyard gate accessible by the pedestrian path is located within the accessible range surface. If the result is not established, then all the buildings in the courtyard are unreachable; if the result is established, it is further determined whether the location of the building entrance and exit is located within the accessible range surface. If the result is not established, then the building is unreachable; if the result is established, it is continued to determine whether the building expansion corrosion coefficient Y is 1. If the result is not established, then the building is unreachable; if the result is established, then the building is accessible. According to the judgment result of whether the courtyard building is accessible, the accessible buildings are completely included in the accessible range surface along the building boundary, and the inaccessible buildings are marked out of the accessible range surface, thereby completing the position correction of the courtyard building accessible range surface, such as Figure 6 shown.

[0077] Specifically, in step S23, the position of the accessible range surface of the buildings in the courtyard is corrected, which specifically includes:

[0078] S231: Based on the physical data of the courtyard gate accessible to pedestrians, determine whether the location of the courtyard gate accessible by the pedestrian path is within the accessible range, and obtain a third judgment result.

[0079] S232: If the third judgment result is no, the courtyard building is unreachable.

[0080] S233: If the third judgment result is yes, further judging whether the entrance and exit of the courtyard building is within the reachable range, and obtaining a fourth judgment result;

[0081] S234: If the fourth judgment result is no, the courtyard building is unreachable;

[0082] S235: If the fourth judgment result is yes, then the expansion corrosion coefficient of the reachable range facing the buildings in the courtyard is calculated, and it is determined whether the expansion corrosion coefficient of the reachable range facing the buildings in the courtyard is 1, to obtain a fifth judgment result.

[0083] S236: If the fifth judgment result is no, the courtyard building is unreachable.

[0084] S237: If the fifth judgment result is yes, the courtyard building is reachable.

[0085] S238: The accessible courtyard buildings are completely included in the accessible range surface along the building boundaries, and the unreachable courtyard buildings are excluded from the accessible range surface, so as to complete the position correction of the accessible range surface of the buildings in the courtyard.

[0086] In another exemplary embodiment of the present invention, in step S24, relying on the current land use data of a city, the boundaries of the plots are extracted, and the coverage rate of the accessible range facing the plots is used as the determination factor for the division of open space (non-enclosed space other than single-family buildings and courtyards), and the coverage rate threshold of the accessible range facing the open space is set to 70%. The expansion corrosion coefficient of the accessible range facing the open space is calculated, and it is determined whether the open space expansion corrosion coefficient Y is 1. If the result is not true, the building is unreachable; if the result is true, the building is accessible. According to the result of the judgment on whether the open space is accessible, the accessible open space is completely included in the accessible range surface along the boundary of the plot, and the inaccessible open space is excluded from the accessible range surface, thereby completing the position correction of the accessible range surface of the open space, such as Figure 7 shown.

[0087] Specifically, in step S24, the position of the open space reachable range surface is corrected, including:

[0088] S241: Calculate the expansion corrosion coefficient of the accessible range facing the open space.

[0089] S242: Determine whether the expansion corrosion coefficient of the reachable range facing the open space is 1, and obtain a sixth determination result.

[0090] S243: If the sixth judgment result is no, the open space is unreachable.

[0091] S244: If the sixth judgment result is yes, the open space is reachable.

[0092] S245: The accessible open space along the boundary of the plot is completely included in the accessible range surface, and the inaccessible open space is excluded from the accessible range surface, so as to complete the position correction of the accessible range surface of the open space.

[0093] In another exemplary embodiment of the present invention, in step S3, the method for regularly demarcating the edge area of ​​a single reachable range surface specifically includes:

[0094] S31: Based on the urban road centerline data, the edge of the reachable range surface is delineated regularly based on the outermost road centerline covered by the reachable range surface, and the delineation of the reachable range surface with the road centerline as the boundary is completed.

[0095] Specifically, based on the road centerline data of a certain city, except for the areas that have been corrected by the accessible range surface and are taken as the edges of the accessible range surface by buildings, courtyard walls, and open space boundaries, the remaining irregular boundaries are delineated based on the road centerline of the outermost road covered by the accessible range surface. The edge area of ​​the accessible range surface covering the outermost road surface is delineated regularly based on the road centerline, and other areas are not processed to complete the delineation of the accessible range surface with the road centerline as the boundary. For example, Figure 8 shown.

[0096] S32: Based on the volumetric data of the courtyard, the boundary of the courtyard is extracted. If all the buildings in the courtyard are within the coverage of the accessible range surface, the edge of the accessible range surface is regularized based on the boundary of the courtyard wall, and the delineation of the accessible range surface with the courtyard wall as the boundary is completed; otherwise, the edge of the reachable range surface is regularized based on the boundary of the outermost courtyard wall covered by the reachable range surface, and the delineation of the reachable range surface with the courtyard wall as the boundary is completed.

[0097] Specifically, relying on the accessible range surface delineated with the road centerline as the boundary obtained in step S31 and the courtyard volume data in the geographical entity of a city, the courtyard boundary is extracted to determine whether all the buildings in the courtyard are within the coverage of the accessible range surface. If the result is established, the courtyard is accessible, and the courtyard is completely included in the accessible range surface along the courtyard wall boundary; if the result is not established, the outermost courtyard wall boundary covered by the accessible range surface is used as the basis, and the remaining irregular boundaries are delineated except for the area that has been corrected by the accessible range surface and the building, courtyard wall, and open space boundary are used as the edge of the accessible range surface. The edge area of ​​the accessible range surface covering the outermost courtyard wall boundary is regularized by the courtyard wall boundary, and other areas are not processed to complete the delineation of the accessible range surface with the courtyard wall as the boundary, such as Fig. 9 shown.

[0098] S33: Based on the outermost land plot boundary covered by the reachable range surface, regularize the edge delineation of the reachable range surface to complete the delineation of the reachable range surface with the land plot as the boundary.

[0099] Specifically, based on the accessible range surface delineated with the courtyard wall as the boundary obtained in step S32, except for the area that has been corrected by the accessible range surface and has the building, courtyard wall, and open space boundary as the edge of the accessible range surface, the remaining irregular boundaries are delineated based on the outermost plot boundary covered by the accessible range surface, and the edge area of ​​the accessible range surface covering the outermost plot boundary is delineated regularly with the plot boundary for the accessible range surface, and other areas are not processed, and the delineation of the accessible range surface with the plot as the boundary is completed, such as Fig.10 shown.

[0100] In another exemplary embodiment of the present invention, in step S4, a method for realizing fusion of reachable range surfaces of a certain type of public service facilities to be measured specifically includes: relying on the result data of regular delineation of the edge of the reachable range surface, using a spatial fusion tool, performing a spatial fusion operation on the reachable range surface set, fusing the reachable range surface data set of the certain type of public service facilities to be measured into one surface, and completing the construction of a complete reachable range surface of the certain type of public service facilities to be measured, such as Fig.11 shown.

[0101] The present invention relies on geographic entity data, realizes data fusion processing according to spatial relationships, generates a preliminary reachable range surface of a certain type of public service facility to be measured through road network analysis; by judging the location information of the building entrance and exit and the courtyard gate accessible by the pedestrian path, calculates the expansion corrosion coefficient according to the reachable range coverage, and corrects the position of a single reachable range surface that runs through the building; based on the road centerline, courtyard boundary, and plot boundary, completes the regularization of the edge area of ​​a single reachable range surface; fuses the reachable range surface set to generate a complete reachable range surface of a certain type of public service facility to be measured, and completes the refined definition of the reachable range surface. Through the embodiment, the reachable range can be finely delineated, providing a more accurate measurement method for the accessibility analysis and evaluation of community urban public service facilities and the delineation of the "quarter-hour living circle", and providing scientific and effective technical support for urban planning and urban renewal construction.

[0102] The present invention also provides an application scenario, which applies the above-mentioned method for finely defining the walkable range. Specifically: The method for finely defining the walkable range provided in this embodiment can be applied in the national land space planning scenario. The national land space planning scenario includes: a preliminary reachable range surface set generation link, a correction link, a regularization delineation link and a spatial fusion calculation link; first, based on the geographic entity data, a preliminary reachable range surface set of the public service facilities to be measured is generated; then, a single reachable range surface that passes through the building in the preliminary reachable range surface set is corrected to obtain a corrected reachable range surface set; the edge area of ​​a single reachable range surface with an irregular boundary in the preliminary reachable range surface set is regularized to obtain the result data of the regularization delineation of the reachable range surface edge; finally, according to the result data of the regularization delineation of the reachable range surface edge, the corrected reachable range surface set is spatially fused and calculated to generate a complete reachable range surface of the public service facilities to be measured, and the fine definition of the reachable range surface is completed.

[0103] Based on the same inventive concept, the embodiment of the present invention further provides a device for finely defining a walkable range for implementing the method for finely defining a walkable range involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the method above, so the specific limitations in one or more embodiments of the device for finely defining a walkable range provided below can refer to the limitations of the method for finely defining a walkable range above, and will not be repeated here.

[0104] In an exemplary embodiment, Fig.12 As shown, a device for finely defining a walkable range is provided, and the device for finely defining a walkable range includes.

[0105] The module M1 for generating a preliminary reachable range surface set is used to generate a preliminary reachable range surface set of the public service facilities to be measured based on geographic entity data; the geographic entity data includes: geographic entity data of transportation facilities and entity data of gates and courtyards.

[0106] The correction module M2 is used to correct a single reachable range surface that passes through the building in the preliminary reachable range surface set to obtain a corrected reachable range surface set.

[0107] The regularization delineation module M3 is used to perform regularization delineation on the edge area of ​​a single reachable range surface with irregular boundaries in the preliminary reachable range surface set to obtain result data of the regularization delineation of the edge of the reachable range surface.

[0108] The spatial fusion calculation module M4 is used to perform spatial fusion calculation on the modified reachable range surface set according to the result data of the regular delineation of the edge of the reachable range surface, generate a complete reachable range surface of the public service facility to be measured, and complete the refined definition of the reachable range surface.

[0109] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Fig.13 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store geographic entity data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for fine-tuning the walking range is implemented.

[0110] Those skilled in the art will understand that Fig.13 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present invention, and does not constitute a limitation on the computer device to which the solution of the present invention is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0111] In an exemplary embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the above-mentioned method embodiments are implemented when the processor executes the computer program.

[0112] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, the above-mentioned method embodiments are implemented.

[0113] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the present invention are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0114] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided by the present invention can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0115] The database involved in each embodiment provided by the present invention may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided by the present invention may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0116] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0117] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for finely defining a walking range, characterized in that: The method for finely defining the walkable range includes: Based on geographic entity data, a preliminary reachable range surface set of the public service facilities to be measured is generated; the geographic entity data includes: geographic entity data of transportation facilities and entity data of hospital gates and hospital walls; Modifying a single reachable range surface that passes through the building in the preliminary reachable range surface set to obtain a modified reachable range surface set; Regularizing the edge area of ​​a single reachable range surface with irregular boundaries in the preliminary reachable range surface set to obtain result data of the regularized delineation of the edge of the reachable range surface; According to the result data of the regular delineation of the edge of the reachable range surface, the spatial fusion calculation is performed on the revised reachable range surface set to generate a complete reachable range surface of the public service facility to be measured, and the refined definition of the reachable range surface is completed; A single reachable range surface that passes through the building in the preliminary reachable range surface set is corrected to obtain a corrected reachable range surface set, specifically including: According to the field attributes of the gate entity, filter the gate entity data that pedestrians can pass through; According to the physical data of the pedestrian accessible courtyard gate, the coverage rate of the entrance and exit of the single-family building and the accessible range facing the single-family building is used as the determination factor for the correction of the accessible range surface of the single-family building, a threshold of the coverage rate of the accessible range facing the single-family building is set, and the expansion corrosion coefficient of the accessible range facing the single-family building is determined. Through the spatial relationship and the expansion corrosion coefficient of the accessible range facing the single-family building, the position correction of the accessible range surface of the single-family building is realized; According to the physical data of the courtyard gate accessible to pedestrians, the courtyard gate accessible by the pedestrian path, the location of the building entrance and exit, and the coverage rate of the accessible range facing the buildings in the courtyard are used as the determination factors for the correction of the accessible range surface of the buildings in the courtyard, a coverage rate threshold of the accessible range facing the courtyard buildings is set, and the expansion corrosion coefficient of the accessible range facing the buildings in the courtyard is determined. Through the spatial relationship and the expansion corrosion coefficient of the accessible range facing the buildings in the courtyard, the position correction of the accessible range surface of the buildings in the courtyard is realized; For open space, according to the current land use data, the boundary of the plot is obtained, the coverage threshold of the accessible range facing the open space is set, the expansion and corrosion coefficient of the accessible range facing the open space is determined, and the position correction of the accessible range surface of the open space is realized through the expansion and corrosion coefficient of the accessible range facing the open space; the open space is a non-enclosed space other than a single-family building and a courtyard; According to the correction of the accessible range surface position of the single-family building, the correction of the accessible range surface position of the building in the courtyard and the correction of the accessible range surface position of the open space, a corrected accessible range surface set is obtained; Correction of the accessible surface position of a single-family building, including: According to the physical data of the pedestrian accessible courtyard door, determine whether the entrance and exit position of the single-family building is within the accessible range, and obtain a first determination result; If the first judgment result is no, the building is unreachable; If the first judgment result is yes, then calculating the expansion corrosion coefficient of the reachable range facing the single-family building, and judging whether the expansion corrosion coefficient of the reachable range facing the single-family building is 1, to obtain a second judgment result; If the second judgment result is no, the building is unreachable; If the second judgment result is yes, the building is reachable; Completely include accessible buildings into the accessible range along the building boundary, exclude unreachable buildings from the accessible range, and complete the position correction of the accessible range of single-building buildings; Correction of the accessible surface position of buildings in the courtyard, including: According to the physical data of the courtyard gate accessible to pedestrians, it is determined whether the location of the courtyard gate accessible by the pedestrian path is within the accessible range surface, and a third determination result is obtained; If the third judgment result is no, the courtyard building is inaccessible; If the third judgment result is yes, further judging whether the entrance and exit of the courtyard building is within the reachable range, and obtaining a fourth judgment result; If the fourth determination result is no, the courtyard building is inaccessible; If the fourth judgment result is yes, then calculating the expansion corrosion coefficient of the reachable range facing the building in the courtyard, and judging whether the expansion corrosion coefficient of the reachable range facing the building in the courtyard is 1, to obtain a fifth judgment result; If the fifth judgment result is no, the courtyard building is inaccessible; If the fifth judgment result is yes, the courtyard building is accessible; Along the building boundary, the accessible courtyard buildings are completely included in the accessible range surface, and the unreachable courtyard buildings are excluded from the accessible range surface, completing the position correction of the accessible range surface of the buildings in the courtyard; Correction of the accessible surface position of open space, including: Calculate the expansion corrosion coefficient of the accessible area facing the open space; Determine whether the expansion corrosion coefficient of the accessible range facing the open space is 1, and obtain a sixth determination result; If the sixth judgment result is no, then the open space is unreachable; If the sixth judgment result is yes, the open space is reachable; The accessible open space along the boundary of the plot is completely included in the accessible range surface, and the inaccessible open space is excluded from the accessible range surface to complete the position correction of the accessible range surface of the open space.

2. The method for finely defining the walkable range according to claim 1, characterized in that: Based on geographic entity data, generate a preliminary reachable range surface set of the public service facilities to be measured, including: Based on the spatial relationship between the geographic entity data of transportation facilities and the walking accessibility of the gate and courtyard entity data, the spatial relationship between geographic entities is judged to construct a road network dataset that is actually accessible on foot. Based on the point of interest data, the types of public service facilities to be measured are screened out; and the public service facilities of the same type are fused into the same layer to obtain a set of public service facilities to be measured; According to the spatial relationship and semantic relationship between the actual accessible road network dataset and the set of public service facilities to be measured, the transportation facility geographic entity data and the gate and courtyard entity data corresponding to the set of public service facilities to be measured are associated and fused to obtain a road network dataset after multi-source data fusion processing; According to the road network dataset processed by the fusion of multi-source data and the type of the public service facility to be measured, the travel time and distance thresholds are set, and the network analysis method taking into account the age of the walking population and the terrain slope is used to generate a preliminary reachable range surface set with the gate of the public service facility as the starting point and the end of the time and distance threshold as the end point.

3. The method for finely defining the walkable range according to claim 1, characterized in that: Regularizing the edge area of ​​a single reachable range surface with irregular boundaries in the preliminary reachable range surface set to obtain result data of regularizing the edge of the reachable range surface, specifically including: Based on the urban road centerline data, the edge of the reachable range surface is delineated regularly based on the outermost road centerline covered by the reachable range surface, and the delineation of the reachable range surface with the road centerline as the boundary is completed; Based on the volumetric data of the courtyard, the boundary of the courtyard is extracted. If all the buildings in the courtyard are within the coverage of the accessible range surface, the boundary of the courtyard wall is used as the basis to perform the edge regularization delineation of the accessible range surface, and the delineation of the accessible range surface with the courtyard wall as the boundary is completed; otherwise, the boundary of the outermost courtyard wall covered by the accessible range surface is used as the basis to perform the edge regularization delineation of the accessible range surface, and the delineation of the accessible range surface with the courtyard wall as the boundary is completed; Based on the outermost plot boundary covered by the reachable range surface, the edge of the reachable range surface is regularly delineated to complete the delineation of the reachable range surface with the plot as the boundary.

4. A device for finely defining a walkable range, used to implement the method for finely defining a walkable range according to any one of claims 1 to 3, characterized in that: The device for finely defining the walkable range includes: A preliminary reachable range surface set generation module is used to generate a preliminary reachable range surface set of the public service facilities to be measured based on geographic entity data; the geographic entity data includes: geographic entity data of transportation facilities and entity data of hospital gates and hospital walls; A correction module, used for correcting a single reachable range surface that passes through the building in the preliminary reachable range surface set to obtain a corrected reachable range surface set; A regularization delineation module is used to perform regularization delineation on a single reachable range surface edge region with irregular boundaries in the preliminary reachable range surface set, and obtain result data of regularization delineation of the reachable range surface edge; The spatial fusion calculation module is used to perform spatial fusion calculation on the revised reachable range surface set according to the result data of the regular delineation of the edge of the reachable range surface, generate a complete reachable range surface of the public service facility to be measured, and complete the refined definition of the reachable range surface.

5. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for finely defining the walkable range according to any one of claims 1 to 3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for finely defining the walkable range according to any one of claims 1 to 3 is implemented.

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