An evaluation method, device and medium for the service capacity of emergency shelters

Abstract

The present invention discloses an evaluation method, device and medium for the service capacity of emergency shelters. The method includes: calculating, based on the basic data of various types of emergency shelters, the service area area set accessible on foot for various types of emergency shelters; performing spatial overlay on the service area area set and the construction land scope to obtain the land area covered by the emergency shelters in the area to be evaluated; calculating the proportion of the population that can be served by various types of emergency shelters in the area to be evaluated according to the population density and land area of the area to be evaluated, so as to obtain the evaluation results of various types of emergency shelters in the area to be evaluated. The present invention proposes an evaluation method, device and medium for the service capacity of emergency shelters. By reasonably calculating the walkability, precisely performing spatial overlay analysis, and fully considering the differences in population density, the evaluation results of various types of emergency shelters are calculated, which can solve the problem of difficult to accurately evaluate the service capacity of emergency shelters.

Description

Technical Field

[0001] The present invention relates to the technical field of urban planning, and particularly to an evaluation method, device and medium for the service capacity of emergency shelters. Background Art

[0002] As an important part of public safety and emergency management, emergency shelters play an important role in early warning response, emergency rescue and transitional resettlement of major emergencies, such as transferring and taking shelter from danger, resettling affected people and maintaining social stability. Scientific evaluation of the service capacity of emergency shelters is an important basis for the special planning of emergency shelters. At present, the evaluation and verification work of emergency shelters is often carried out by the method of "data review + on-site investigation". This method combines the analysis of written materials and the investigation of the actual environment, and can timely evaluate the actual situation and effectiveness of emergency shelters.

[0003] However, due to the characteristics of a large number and scattered locations of emergency shelter facilities, it is easy to lead to insufficient accuracy in the evaluation of the service capacity of emergency shelters; moreover, directly averaging the population in non-construction land will result in a low population density data, causing the evaluation of the service capacity of emergency shelters to be mismatched with the actual population distribution. Summary of the Invention

[0004] The present invention provides an evaluation method, device and medium for the service capacity of emergency shelters to solve the problem of difficult accurate evaluation of the service capacity of emergency shelters.

[0005] Obtain the basic data of various emergency shelters and roads in the area to be evaluated;

[0006] Based on the basic data, calculate the service area area set accessible on foot to each type of emergency shelter according to the walking time to each type of emergency shelter;

[0007] Perform spatial overlay on the service area area set and the construction land scope of the area to be evaluated to obtain the land area covered by the emergency shelter service in the area to be evaluated;

[0008] Calculate the population proportion that each type of emergency shelter in the area to be evaluated can serve according to the population density and the land area of the area to be evaluated, and obtain the evaluation results of each type of emergency shelter in the area to be evaluated.

[0009] In the present invention, since the walkability is directly related to whether people can quickly reach the shelter in case of emergency, the actual service scope and service capacity of the emergency shelter can be more accurately evaluated through the calculation of walking time. Through spatial superposition, it can be intuitively shown which areas are effectively covered by the service and which areas may have service blind spots or insufficient service capacity. Calculate the proportion of the population that various emergency shelters can serve according to the population density and land area of the area to be evaluated. This method fully considers the differences in population distribution; since the population density varies in different regions and the service requirements for emergency shelters are also different, by considering the population density, the service capacity of the emergency shelters can be more reasonably evaluated; and this method avoids the problem that directly averaging the population data to non-construction land will result in a low population density data, making the evaluation result of the service capacity of the emergency shelter match the actual population distribution situation.

[0010] Compared with the prior art, the present invention calculates the evaluation results of various emergency shelters by reasonably calculating the walkability, accurately performing spatial superposition analysis, and fully considering the differences in population density, thereby reducing the subjectivity and randomness in the evaluation process and improving the accuracy and reliability of the evaluation results. Therefore, it can solve the problem of difficult to accurately evaluate the service capacity of emergency shelters.

[0011] As a preferred solution, based on the basic data, calculate the service area area set accessible on foot for each type of emergency shelter according to the walking time to each type of emergency shelter, specifically:

[0012] Interrupt the intersecting lines of the road centerlines in the basic data and correct the topological errors in the basic data to obtain a set of road line segments;

[0013] Calculate a set of walking times according to the set of road line segments at a preset walking speed;

[0014] Based on the set of walking times, establish a cost matrix and solve it to obtain the service area area set accessible on foot for each type of emergency shelter.

[0015] This preferred solution can ensure the accuracy and consistency of the road network data by interrupting the intersecting lines of the road centerlines and correcting the topological errors, which helps to eliminate the network connectivity problems caused by un-interrupted intersecting lines or topological errors. Using the cost matrix for solution can efficiently calculate the set of walking times and the service area area set accessible on foot; and this process can be calculated according to different walking times to adapt to the walking needs of different people, which helps to ensure the comprehensiveness and accuracy of the analysis results.

[0016] As a preferred solution, a cost matrix is established based on the set of walking times and solved to obtain the set of service area areas reachable on foot for various types of emergency shelters, specifically as follows:

[0017] Based on the set of walking times, in a preset network analysis tool, by loading the long-term fixed emergency shelter facility points, short-term fixed emergency shelter facility points, and emergency emergency shelter facility points as starting points and setting the walking direction as leaving the facility points, the cost matrix is established;

[0018] By defining the walking time as a cost attribute and solving the cost matrix, the set of service area areas reachable on foot for various types of emergency shelters is obtained.

[0019] This preferred solution establishes a cost matrix based on detailed road network data and walking time costs, which can accurately reflect the walkability from emergency shelter facility points to the surrounding areas. By solving the cost matrix, an accurate set of service area areas can be obtained, providing a scientific basis for subsequent evaluations.

[0020] As a preferred solution, a spatial overlay is performed on the set of service area areas and the construction land scope of the area to be evaluated to obtain the land area covered by the emergency shelter service in the area to be evaluated, specifically as follows:

[0021] A spatial overlay is performed on the set of service area areas and the construction land scope of the area to be evaluated to obtain a spatially overlaid area; wherein, the construction land scope of the area to be evaluated refers to the scope of urban concentrated construction areas and village construction areas;

[0022] By cutting out the area intersection area of the spatially overlaid area, the land area covered by the emergency shelter service in the area to be evaluated is obtained.

[0023] This preferred solution can accurately match the service area of the emergency shelter with the construction land scope of the area to be evaluated through spatial overlay analysis, ensuring the accuracy of the evaluation results. The construction land scope of the area to be evaluated refers to the scope of urban concentrated construction areas and village construction areas, which helps to ensure that the evaluation results can truly reflect the coverage of the emergency shelter in actual use.

[0024] As a preferred solution, according to the population density and the land area of the area to be evaluated, the population ratio that various types of emergency shelters in the area to be evaluated can serve is calculated to obtain the evaluation results of various types of emergency shelters in the area to be evaluated, specifically as follows:

[0025] The land area is subdivided into administrative regions to obtain the area of the region covered by the smallest unit emergency shelter service;

[0026] Based on the area of the region and the population density of the administrative regions in the region to be evaluated, calculate the number of people served by the coverage areas of various emergency shelter sites in the region to be evaluated;

[0027] According to the number of people and the total population of the region to be evaluated, calculate the proportion of the population that various emergency shelter sites in the region to be evaluated can serve;

[0028] Evaluate the proportion of the population to obtain the evaluation results of the service capabilities of various emergency shelter sites in the region to be evaluated.

[0029] In this preferred solution, by subdividing the land area into administrative regions, the service capabilities of emergency shelter sites in each administrative region can be evaluated more precisely. Combining the population density of the administrative regions, calculate the number of people within the service scope of various emergency shelter sites. This calculation method takes into account the differences in population distribution, making the evaluation results more targeted.

[0030] As a preferred solution, after obtaining the basic data of various emergency shelter sites and roads in the region to be evaluated, it further includes:

[0031] Classify the emergency shelter sites in the basic data according to their scale and functional positioning to obtain the first basic data including long-term fixed emergency shelter sites, short-term fixed emergency shelter sites, and emergency emergency shelter sites;

[0032] Based on the basic data, eliminate the sections that are not suitable for walking, and classify the routes according to the road levels to obtain the second basic data including several emergency shelter sites and road types;

[0033] The final basic data is composed of the first basic data and the second basic data.

[0034] In this preferred solution, long-term fixed emergency shelter sites are usually set in relatively safe and easily accessible areas to accommodate more shelter seekers; short-term fixed emergency shelter sites are usually set near the perimeters of dangerous areas to quickly evacuate people in case of emergencies; emergency emergency shelter sites are usually set inside or near buildings to provide temporary shelter in case of emergencies inside the buildings. By subdividing the shelter sites, more powerful data support can be provided for subsequent evaluations. After eliminating the sections that are not suitable for walking, the remaining roads are more suitable for walking evacuation; at the same time, classifying the routes according to the road levels can provide more clear evacuation path options for the evacuees and reduce getting lost and delays during the evacuation process.

[0035] This application also provides an evaluation device for the service capabilities of emergency shelter sites, including a data module, a duration module, a superposition module, and an evaluation module;

[0036] Among them, the data module is used to obtain the basic data of various emergency shelters and roads in the area to be evaluated;

[0037] The duration module is used to calculate the service area area set accessible on foot for various emergency shelters based on the basic data according to the walking duration to the various emergency shelters;

[0038] The overlay module is used to perform a spatial overlay on the service area area set and the construction land scope of the area to be evaluated to obtain the land area covered by the emergency shelter service in the area to be evaluated;

[0039] The evaluation module is used to calculate the population ratio that various emergency shelters in the area to be evaluated can serve according to the population density and the land area of the area to be evaluated, and obtain the evaluation results of various emergency shelters in the area to be evaluated.

[0040] As a preferred solution, the duration module includes a correction unit, a set unit, and a matrix unit;

[0041] Among them, the correction unit is used to interrupt the intersecting lines of the road centerlines in the basic data and correct the topological errors in the basic data to obtain a set of road segments;

[0042] The set unit is used to calculate a set of walking times according to the set of road segments at a preset walking speed;

[0043] The matrix unit is used to establish and solve a cost matrix based on the set of walking times to obtain the service area area set accessible on foot for various emergency shelters.

[0044] As a preferred solution, the matrix unit includes a matrix subunit and a solution subunit;

[0045] Among them, the matrix subunit is used to establish the cost matrix based on the set of walking times in a preset network analysis tool by loading the long-term fixed emergency shelter facility points, short-term fixed emergency shelter facility points, and emergency emergency shelter facility points as starting points and setting the walking direction as leaving the facility points;

[0046] The solution subunit is used to solve the cost matrix by defining the walking time as a cost attribute to obtain the service area area set accessible on foot for various emergency shelters.

[0047] As a preferred solution, the overlay module includes an overlay unit and a clipping unit;

[0048] Among them, the superimposing unit is used to perform spatial superposition on the service area area set and the construction land scope of the area to be evaluated, so as to obtain a spatial superposition area; wherein, the construction land scope of the area to be evaluated refers to the scope of urban concentrated construction areas and village construction areas;

[0049] The clipping unit is used to obtain the land area covered by the emergency shelter service for the area to be evaluated by clipping out the area intersection region of the spatial superposition area.

[0050] As a preferred solution, the evaluation module includes a subdivision unit, a density unit, a proportion unit, and an evaluation unit;

[0051] Among them, the subdivision unit is used to subdivide the land area by administrative region to obtain the area covered by the emergency shelter service of the smallest unit;

[0052] The density unit is used to calculate the population served by the coverage scope of various types of emergency shelters in the area to be evaluated based on the regional area and the population density of the administrative region in the area to be evaluated;

[0053] The proportion unit is used to calculate the proportion of the population that can be served by various types of emergency shelters in the area to be evaluated according to the population quantity and the total population of the area to be evaluated;

[0054] The evaluation unit is used to evaluate the population proportion to obtain the evaluation result of the service capacity of various types of emergency shelters in the area to be evaluated.

[0055] As a preferred solution, after the data module, there are also a classification unit, a rejection unit, and a combination unit;

[0056] Among them, the classification unit is used to classify the emergency shelters in the basic data according to the scale and functional orientation, so as to obtain the first basic data including long-term fixed emergency shelters, short-term fixed emergency shelters, and emergency emergency shelters;

[0057] The rejection unit is used to reject the sections that are not suitable for walking based on the basic data and classify the routes according to the road level, so as to obtain the second basic data including several emergency shelters and road types;

[0058] The combination unit is used to form the final basic data from the first basic data and the second basic data.

[0059] This application also provides a storage medium, on which a computer program is stored. The computer program is called and executed by a computer to implement the above-mentioned evaluation method for the service capacity of an emergency shelter. Brief Description of the Drawings

[0060] Figure 1 is a schematic flow chart of a method for evaluating the service capacity of an emergency shelter provided by an embodiment of the present application;

[0061] Figure 2 is a schematic diagram of various emergency shelter points and road networks provided by an embodiment of the present application;

[0062] Figure 3 is a schematic diagram of the coverage range of the walkable service area of various emergency shelters provided by an embodiment of the present application;

[0063] Figure 4 is a schematic diagram of the current distribution of urban, rural and construction land in the area to be evaluated provided by an embodiment of the present application;

[0064] Figure 5 is a schematic diagram of the spatial superposition of the walkable area range of various emergency shelters and the current construction land provided by an embodiment of the present application;

[0065] Figure 6 is a schematic diagram of the land use range covered by the current construction of the service coverage of various emergency shelters provided by an embodiment of the present application;

[0066] Figure 7 is a flow chart of the evaluation of the service capacity of an emergency shelter provided by an embodiment of the present application;

[0067] Figure 8 is a schematic structural diagram of an evaluation device for the service capacity of an emergency shelter provided by an embodiment of the present application. Detailed Embodiment

[0068] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0069] In the description of the present application, unless otherwise specified, the meaning of "several" is two or more.

[0070] A method for evaluating the service capacity of an emergency shelter provided by an embodiment of the present application is mainly applied to the situation where it is necessary to improve the fineness of the evaluation of the service capacity of an emergency shelter and accurately adapt the service capacity of the emergency shelter to the actual population distribution.

[0071] Embodiment 1:

[0072] Please refer toFigure 1 The embodiment of the present application provides a method for evaluating the service capacity of an emergency shelter, including S1 to S4, and the specific implementation steps are as follows:

[0073] S1. Obtain basic data on various emergency shelters and roads in the area to be assessed.

[0074] Step S1 of the embodiment of the present application is specifically as follows:

[0075] Obtain basic data on various emergency shelters and roads in the area to be assessed.

[0076] The emergency shelters in the basic data are classified according to the size and functional positioning of the preset standards, and the first basic data including long-term fixed emergency shelters, short-term fixed emergency shelters and emergency emergency shelters are obtained; the preset standard is "GBT 44013-2024 Classification and Classification of Emergency Shelters"; and long-term fixed emergency shelters must meet the service radius of 5km and can be reached within 70min to 90min on foot; short-term fixed emergency shelters must meet the service radius of 2.5km and can be reached within 30min to 40min on foot; emergency emergency shelters must meet the service radius of 1km and can be reached within 10min to 15min on foot;

[0077] The existing road centerline vector data was obtained from the open source database OSM (OpenStreetMap), and the basic data was converted into shapefile linear data through ArcGIS conversion tools. The highway data and expressway data that are not suitable for walking were eliminated, and the routes were classified according to the road level to obtain the second basic data containing several emergency shelters and road types; the road level includes main road, secondary road and branch road;

[0078] The final basic data are composed of the first basic data and the second basic data.

[0079] To apply the embodiments of this application, please refer to Figure 2 , Figure 2 It is a schematic diagram of various emergency shelter locations and road networks provided in the embodiments of the present application, which represents the shapefile linear data representation obtained after data elimination and classification of basic data.

[0080] In this embodiment S1, the long-term fixed emergency shelter is a shelter that provides emergency refuge, long-term shelter resettlement, and centralized assistance to emergency shelter seekers within the service radius, and is equipped with emergency facilities, equipment, and supplies that meet the requirements of emergency shelter function configuration. It is mainly applicable to various types of shelters such as earthquake disasters, geological disasters, flood disasters, low-temperature freezing and snow disasters, tsunami disasters, forest and grassland fires, ecological environment incidents, public health incidents, and air raid incidents; the short-term fixed emergency shelter is a shelter that provides emergency refuge, short-term shelter resettlement, and centralized assistance to emergency shelter seekers within the service radius, and is equipped with emergency facilities, equipment, and supplies that meet the requirements of emergency shelter function configuration. It is mainly applicable to various types of shelters such as earthquake disasters, geological disasters, flood disasters, typhoon and rainstorm disasters, low-temperature freezing and snow disasters, tsunami disasters, forest and grassland fires, production safety accidents, ecological environment incidents, public health incidents, and air raid incidents; the emergency emergency shelter is a shelter that provides emergency refuge to emergency shelter seekers within the service radius, and is equipped with emergency facilities, equipment, and supplies that meet the basic configuration requirements of emergency shelter function. It is also a transitional place for emergency shelter seekers to gather and transfer to other types of shelters. It is mainly applicable to various types of shelters such as earthquake disasters, geological disasters, flood disasters, typhoon and rainstorm disasters, forest and grassland fires, production safety accidents, and air raid incidents; at the same time, classifying routes according to road levels can provide more clear evacuation path options for evacuees and reduce getting lost and delays during the evacuation process.

[0081] S2. Based on the basic data, calculate the service area area set reachable on foot for various types of emergency shelters according to the walking time to various types of emergency shelters.

[0082] Step S2 of the embodiment of the present application includes S2.1 to S2.2, specifically:

[0083] S2.1. Import the road centerline vector data in the basic data on the Arcgis platform to construct a traffic data network;

[0084] Use the Arcgis advanced editing tool to break the intersecting lines of the road centerlines in the basic data, and perform topological error checking on the basic data according to the topological rules, and correct the topological errors through the editing tool until there are no topological errors, meeting the requirements of no hanging points and no self-intersection, to obtain the road segment set L = { , ... }; where the topological rule is that there are no hanging points and no self-intersection;

[0085] Add the field attribute of "walking time" to each road segment in the road segment set L, with the field unit being "min"; and based on the average walking speed of 60 m / min, calculate the walking time set T = { , ... }。

[0086] Among them, the formula for solving the walking time in the walking time set is as follows:

[0087]

[0088] Among them, is the walking time, is the length of the road segment in the road segment set L, is the average walking speed.

[0089] For the application of the embodiments of the present application, please refer to Table 1. Table 1 is the road attribute table provided by the embodiments of the present application, indicating the walking time corresponding to roads of different lengths.

[0090] Table 1 Road Attribute Table

[0091]

[0092] In this embodiment, S2.1 can ensure the accuracy and consistency of the road network data by interrupting the intersecting lines of the road centerline and correcting topological errors, which helps to eliminate network connectivity problems caused by un-interrupted intersecting lines or topological errors.

[0093] S2.2. Based on the walking time set T, on the Arcgis platform, through the network analysis tool (Network Analyst), using the traffic data network as the basis, load the long-term fixed emergency shelter facility points, short-term fixed emergency shelter facility points, and emergency emergency shelter facility points as starting points, and set the walking direction as leaving the facility points to establish a cost matrix;

[0094] Based on the preset standards, solve the cost matrix according to walking for 90 minutes, 40 minutes, and 15 minutes respectively to obtain the service area area sets accessible on foot for various types of emergency shelters ; among them, this solving process logically shows that it diverges from the facility points to the surrounding roads, summarizes the walking time required for each road section, and when the total time reaches 90 minutes, 40 minutes, and 15 minutes, outputs the end positions in each direction, and the area enclosed by connecting the end positions in each direction is used as the analysis result; and the preset standard is "GBT 44013-2024 Classification and Grading of Emergency Shelters";

[0095] Among them, the service area area set includes the area accessible within 90 minutes on foot from the long-term fixed emergency shelter facility points and the area accessible within 40 minutes on foot from the short-term fixed emergency shelter facility points , and including the area within a 15-minute walking distance from the emergency shelter facility point ;

[0096] And the set of service area sizes Logically, it is expressed as: Is the set point of long-term fixed emergency shelters The union of the areas within a 90-minute walking distance, And Similarly.

[0097] Among them, for the set of service area sizes, there are:

[0098] ;

[0099] ;

[0100]

[0101] Among them, Is the area within a 90-minute walking distance from the long-term fixed emergency shelter facility point, Represents the long-term fixed emergency shelter point The area within a 90-minute walking distance; Is the area within a 40-minute walking distance from the short-term fixed emergency shelter facility point, Is from the short-term fixed emergency shelter facility point The area within a 40-minute walking distance; Is the area within a 15-minute walking distance from the emergency shelter facility point; Is from the emergency shelter facility point The area within a 15-minute walking distance; Is from the emergency shelter facility point The area within a 15-minute walking distance.

[0102] For applying the embodiments of the present application, please refer to Figure 3 , Figure 3 Is a schematic diagram showing the coverage range of the walking-accessible service areas of various emergency shelters provided by the embodiments of the present application, representing the set of the walking-accessible service area sizes of various emergency shelters .

[0103] This embodiment S2.2 establishes a cost matrix based on detailed road network data and walking time costs, which can accurately reflect the walking accessibility from emergency shelter facilities to surrounding areas. By solving the cost matrix, the walking time set and the walking service area area set can be efficiently calculated; and this process can be calculated according to different walking times to meet the walking needs of different groups of people, which helps to ensure the comprehensiveness and accuracy of the analysis results.

[0104] S3. Spatially superimpose the service area area set and the construction land scope of the area to be evaluated to obtain the land area of the area to be evaluated covered by the emergency shelter service.

[0105] Step S3 of the embodiment of the present application is specifically as follows:

[0106] Obtain the land vector shapefile surface data of the land change survey area to be evaluated, extract the construction land type in the name land type, that is, the land type of "urban land, town land and village land", the land code is "201, 202 and 203", and obtain the current urban and rural construction land, and the total area of the current urban and rural construction land (the construction land scope of the area to be evaluated) is S;

[0107] Service area set Spatially superimpose the construction land scope S of the area to be evaluated to obtain a spatial superposition area;

[0108] By cutting out the area intersection area of the spatial superposition area, the land area of the emergency shelter service coverage area to be evaluated is obtained (the land area of the current construction of various emergency shelter service coverage areas to be evaluated) .

[0109] The mathematical formula for the land area of the emergency shelter service coverage area to be assessed is:

[0110]

[0111] in, Provide services for various emergency shelters covering the current construction area in the area to be assessed, The area that can be reached within 90 minutes’ walk from the permanent emergency shelter facility. It is the area that can be reached within 40 minutes’ walk from the short-term fixed emergency shelter facility. It is the area that can be reached within 15 minutes’ walk from the emergency shelter facility, and S is the total area of existing urban and rural construction land in the area to be assessed.

[0112] To apply the embodiments of this application, please refer to Figures 4 - 6 ;

[0113] Figure 4 It is a schematic diagram of the distribution of current urban, rural and construction land in the area to be evaluated provided by the embodiment of the present application, showing the scope of construction land in the area to be evaluated.

[0114] Figure 5 It is a schematic diagram of the spatial superposition of the accessible areas of various emergency shelters provided by the embodiment of the present application and the current construction land, showing the area set of the service area and the scope S of the construction land in the area to be evaluated are spatially superimposed to obtain the spatial superposition area.

[0115] Figure 6 It is a schematic diagram of the scope of the current construction land covered by the services of various emergency shelters provided by the embodiment of the present application, showing the land area covered by the services of the emergency shelters in the area to be evaluated .

[0116] In this embodiment, through spatial superposition analysis, S3 can accurately match the service area of the emergency shelter with the scope of the construction land in the area to be evaluated, ensuring the accuracy of the evaluation results. The scope of the construction land in the area to be evaluated refers to the scope of the urban concentrated construction area and the village construction area, which helps to ensure that the evaluation results can truly reflect the coverage of the emergency shelter in actual use.

[0117] S4. Calculate the population ratio that various emergency shelters in the area to be evaluated can serve according to the population density and land area of the area to be evaluated, and obtain the evaluation results of various emergency shelters in the area to be evaluated.

[0118] Step S4 of the embodiment of the present application includes S4.1 to S4.2, specifically:

[0119] S4.1. Obtain the total annual population data of the city (county) where the area to be evaluated is located , and obtain the population quantity of each administrative region subdivided into sub-districts (towns) ;

[0120] The population quantity of each administrative region subdivided into sub-districts (towns) is evenly distributed in the current urban, rural and construction land of the administrative region of the sub-district (town) to obtain the population density of each administrative region subdivided into sub-districts (towns) .

[0121] Among them, the population density of the administrative region is:

[0122]

[0123] Among them, is the population density distribution data of the d-th administrative region of the sub-district (town), is the population of the administrative region of the d-th subdistrict (town), is the area of the administrative region of the d-th subdistrict (town), represents the total number of subdistricts (towns) involved in the area to be evaluated.

[0124] In this embodiment, S4.1 can more accurately evaluate the service capacity of emergency shelters in each administrative region by subdividing the land area by administrative region.

[0125] S4.2. Subdivide the land area by subdistrict (town) to obtain the area covered by the emergency shelters in each subdistrict (town). ;

[0126] Based on the area and the population density of the administrative regions in the area to be evaluated , calculate the population served by the coverage areas of various types of emergency shelters in the area to be evaluated ;

[0127] According to the population and the total population of the area to be evaluated , calculate the set of population ratios that various types of emergency shelters in the area to be evaluated can serve;

[0128] Evaluate the population ratios in the set of population ratios . If < 60%, the service capacity of the emergency shelters in this area is unqualified; if 60% ≤ < 80%, the service capacity of the emergency shelters in this area is good; if 80% ≤ , the service capacity of the emergency shelters in this area is excellent; traverse the population ratios of various types of emergency shelters to obtain the evaluation results of the service capacity of various types of emergency shelters in the area to be evaluated.

[0129] Among them, the formula for solving the area is:

[0130]

[0131] The population is:

[0132]

[0133] The population ratio is:

[0134]

[0135] Among them, is the total area of the current construction land in the area to be evaluated covered by various types of emergency shelters, is the service coverage area of the d-th street (town) emergency shelter, represents the total number of streets (towns) involved in the area to be evaluated;

[0136] is the number of people served by the coverage scope of various emergency shelters in the area to be evaluated, is the population density distribution data of the administrative region of the d-th street (town), is the population number of the administrative region of the d-th street (town), is the area of the administrative region of the d-th street (town);

[0137] is the proportion of the population that the emergency shelter can serve, is the total population number of the area to be evaluated.

[0138] In this embodiment S4.2, the population number within the service scope of various emergency shelters is calculated by combining the population density of the administrative region. This calculation method takes into account the differences in population distribution, making the evaluation results more targeted.

[0139] For applying the embodiment of the present application, please refer to Figure 7 , Figure 7 is the flowchart for evaluating the service capacity of the emergency shelter provided by the embodiment of the present application, showing the general process of evaluating the service capacity of the emergency shelter in this embodiment.

[0140] Overall, this embodiment has the following beneficial effects:

[0141] In the present application, since the walkability is directly related to whether people can quickly reach the shelter in an emergency, through the calculation of walking duration, the actual service scope and service capacity of the emergency shelter can be evaluated more accurately. Through spatial overlay, it can be intuitively shown which areas have effective service coverage and which areas may have service blind spots or insufficient service capacity. By calculating the proportion of the population that various emergency shelters can serve according to the population density and land area of the area to be evaluated, this method fully considers the differences in population distribution; since the population densities in different regions are different and the service demands for emergency shelters are also different, by considering the population density, the service capacity of the emergency shelter can be evaluated more reasonably; and this method avoids the problem that directly averaging the population data to non-construction land will lead to a low population density data, making the evaluation results of the service capacity of the emergency shelter match the actual population distribution.

[0142] Embodiment Two:

[0143] Please refer to Figure 8, embodiments of the present application provide an evaluation device for the service capacity of emergency shelters, including a data module 10, a duration module 20, an overlay module 30, and an evaluation module 40;

[0144] Among them, the data module 10 is used to obtain the basic data of various types of emergency shelters and roads in the area to be evaluated;

[0145] The duration module 20 is used to calculate the service area area set accessible on foot to various types of emergency shelters based on the basic data according to the walking duration to various types of emergency shelters;

[0146] The overlay module 30 is used to spatially overlay the service area area set and the construction land scope of the area to be evaluated to obtain the land area covered by the emergency shelter service in the area to be evaluated;

[0147] The evaluation module 40 is used to calculate the proportion of the population that various types of emergency shelters in the area to be evaluated can serve based on the population density and land area of the area to be evaluated, and obtain the evaluation results of various types of emergency shelters in the area to be evaluated.

[0148] In one embodiment, the data module 10 includes an acquisition unit, a classification unit, a rejection unit, and a combination unit;

[0149] Among them, the acquisition unit is used to obtain the basic data of various types of emergency shelters and roads in the area to be evaluated.

[0150] The classification unit is also used to classify the emergency shelters in the basic data according to the scale and function positioning of the preset standard, and obtain the first basic data including long-term fixed emergency shelters, short-term fixed emergency shelters, and emergency emergency shelters; among them, the preset standard is "GBT 44013-2024 Classification and Grading of Emergency Shelters"; and, the long-term fixed emergency shelter needs to meet the service radius within 5 km and be reachable within 70 min - 90 min on foot; the short-term fixed emergency shelter needs to meet the service radius within 2.5 km and be reachable within 30 min - 40 min on foot; the emergency emergency shelter needs to meet the service radius within 1 km and be reachable within 10 min - 15 min on foot;

[0151] The rejection unit is used to obtain the current road centerline vector data in the open source database OSM (OpenStreetMap), convert the basic data into shapefile line data through the Arcgis conversion tool, reject the highway data and expressway data that are not suitable for walking, and classify the routes according to the road level to obtain the second basic data including several emergency shelters and road types; among them, the road level includes arterial roads, secondary arterial roads, and branch roads;

[0152] A combining unit for constructing final basic data from first basic data and second basic data.

[0153] For applying the embodiments of the present application, please refer to Figure 2 , Figure 2 which is a schematic diagram of various emergency shelter points and road networks provided by the embodiments of the present application, showing the shapefile line data representation obtained after data elimination and classification of the basic data.

[0154] In the data module 10 of this embodiment, long-term fixed emergency shelters are used to provide emergency shelter, long-term shelter placement and centralized rescue for emergency shelter personnel within the service radius, and have emergency facilities, equipment and supplies that meet the requirements of emergency shelter function configuration. They are mainly applicable to various types of shelters such as earthquake disasters, geological disasters, flood disasters, low-temperature freezing and snow disasters, tsunami disasters, forest and grassland fires, ecological environment incidents, public health incidents and air raid incidents; short-term fixed emergency shelters are used to provide emergency shelter, short-term shelter placement and centralized rescue for emergency shelter personnel within the service radius, and have emergency facilities, equipment and supplies that meet the requirements of emergency shelter function configuration. They are mainly applicable to various types of shelters such as earthquake disasters, geological disasters, flood disasters, typhoon and rainstorm disasters, low-temperature freezing and snow disasters, tsunami disasters, forest and grassland fires, production safety accidents, ecological environment incidents, public health incidents and air raid incidents; emergency emergency shelters are used to provide emergency shelter for emergency shelter personnel within the service radius, and have emergency facilities, equipment and supplies that meet the basic configuration requirements of emergency shelter function. They are also transitional places for emergency shelter personnel to gather and transfer to other types of shelters. They are mainly applicable to various types of shelters such as earthquake disasters, geological disasters, flood disasters, typhoon and rainstorm disasters, forest and grassland fires, production safety accidents and air raid incidents; at the same time, classifying routes according to road levels can provide more clear evacuation route options for evacuating personnel and reduce getting lost and delays during the evacuation process.

[0155] In one embodiment, the duration module 20 includes a correction unit, an aggregation unit, a matrix sub-unit and a solution sub-unit;

[0156] Among them, the correction unit is used to import the road centerline vector data in the basic data on the Arcgis platform to construct a traffic data network;

[0157] The correction unit is also used to interrupt the intersecting lines of the road centerlines in the basic data through the Arcgis advanced editing tool, perform topological error checking on the basic data according to topological rules, and correct topological errors through the editing tool until there are no topological errors, meeting the requirements of no hanging points and no self-intersections, to obtain a set of road segments L = { , ... }; Among them, the topological rule is that there are no hanging points and self - intersection is not allowed;

[0158] A set unit, used to add the field attribute of "walking time" with the unit of "min" to each road segment in the road segment set L; and based on the average walking speed of 60 m / min, calculate the walking time set T = { , ... }}.

[0159] Among them, the formula for solving the walking time in the walking time set is:

[0160]

[0161] Among them, is the walking time, is the length of the road segment in the road segment set L, is the average walking speed.

[0162] For applying the embodiments of the present application, please refer to Table 1. Table 1 is the road attribute table provided by the embodiments of the present application, indicating the walking time corresponding to roads of different lengths.

[0163] Table 1 Road Attribute Table

[0164]

[0165] In this embodiment, the correction unit and the set unit can ensure the accuracy and consistency of the road network data by interrupting the intersecting lines of the road centerline and correcting topological errors, which helps to eliminate network connectivity problems caused by un - interrupted intersecting lines or topological errors.

[0166] A matrix sub - unit, used to build a cost matrix based on the walking time set T on the Arcgis platform through the Network Analyst tool, using the traffic data network as the basis, loading the long - term fixed emergency shelter facility points, short - term fixed emergency shelter facility points, and emergency emergency shelter facility points as starting points, and setting the walking direction as leaving the facility points;

[0167] A solving sub - unit, used to solve the cost matrix based on preset criteria, respectively according to walking for 90 min, 40 min, and 15 min, to obtain the service area area sets reachable on foot for various types of emergency shelters ; Among them, the solving process logically manifests as radiating from the facility points to the surrounding roads, summarizing the walking times required for each road section, and when the total time reaches 90 minutes, 40 minutes, and 15 minutes, outputting the end positions in each direction, and taking the area enclosed by connecting the end positions in each direction as the analysis result; moreover, the preset standard is "GBT 44013-2024 Classification and Grading of Emergency Shelters".

[0168] Among them, the service area area set includes the area reachable within 90 minutes' walk from the long-term fixed emergency shelter facility points , the area reachable within 40 minutes' walk from the short-term fixed emergency shelter facility points , and includes the area reachable within 15 minutes' walk from the emergency emergency shelter facility points ;

[0169] Moreover, the service area area set logically manifests as: is the union of the areas reachable within 90 minutes' walk from the long-term fixed emergency shelter collection points , and similarly.

[0170] Among them, for the service area area set, there are:

[0171] ;

[0172] ;

[0173]

[0174] Among them, is the area reachable within 90 minutes' walk from the long-term fixed emergency shelter facility points, represents the area reachable within 90 minutes' walk from the long-term fixed emergency shelter points ; is the area reachable within 40 minutes' walk from the short-term fixed emergency shelter facility points, is the area reachable within 40 minutes' walk from the short-term fixed emergency shelter facility points ; is the area reachable within 15 minutes' walk from the emergency emergency shelter facility points; is the area reachable within 15 minutes' walk from the emergency emergency shelter facility points ; is the area reachable within 15 minutes' walk from the emergency emergency shelter facility points The area reachable within a 15 - minute walk from the starting point.

[0175] For applying the embodiments of the present application, please refer to Figure 3 , Figure 3 which is a schematic diagram showing the coverage scope of the walkable service area of various emergency shelters provided by the embodiments of the present application, representing the set of the areas of the walkable service areas of various emergency shelters .

[0176] In this embodiment, the matrix sub - unit and the solution sub - unit establish a cost matrix based on detailed road network data and walking time cost, which can accurately reflect the walkability from the emergency shelter facility points to the surrounding areas. By using the cost matrix for solution, the set of walking times and the set of the areas of the walkable service areas can be calculated efficiently; and this process can be calculated according to different walking times to adapt to the walking needs of different people, which helps to ensure the comprehensiveness and accuracy of the analysis results.

[0177] In one embodiment, the overlay module 30 includes an overlay unit and a clipping unit;

[0178] Among them, the overlay unit is used to obtain the vector shapefile polygon data of the land use change survey of the area to be evaluated, extract the construction land types in the land use type, that is, the land use types of "urban land, land for towns and townships, and rural land", and the land use codes are "201, 202, and 203", to obtain the current urban, town, and village construction land, and the total area of the current urban, town, and village construction land (the construction land scope of the area to be evaluated) is S;

[0179] The overlay unit is also used to perform a spatial overlay on the set of service area areas and the construction land scope S of the area to be evaluated to obtain a spatial overlay area;

[0180] The clipping unit is used to obtain the land area covered by the emergency shelter service in the area to be evaluated (the land area covered by the current construction of various emergency shelters in the area to be evaluated) by clipping out the area intersection region of the spatial overlay area .

[0181] Among them, the mathematical formula for the land area covered by the emergency shelter service in the area to be evaluated is:

[0182]

[0183] Among them, is the land area covered by the current construction of various emergency shelters in the area to be evaluated, is the area reachable within a 90 - minute walk from the long - term fixed emergency shelter facility points, It is the area reachable within 40 minutes on foot starting from the short-term fixed emergency shelter facility point. It is the area reachable within 15 minutes on foot starting from the emergency shelter facility point. S is the total area of the current urban, rural and construction land in the area to be evaluated.

[0184] For applying the embodiment of the present application, please refer to Figures 4 - 6 ;

[0185] Figure 4 It is a schematic diagram of the distribution of the current urban, rural and construction land in the area to be evaluated provided by the embodiment of the present application, indicating the construction land scope of the area to be evaluated.

[0186] Figure 5 It is a schematic diagram of the spatial superposition of the reachable areas of various emergency shelters on foot and the current construction land, indicating the spatial superposition area obtained by spatially superposing the service area set and the construction land scope S of the area to be evaluated.

[0187] Figure 6 It is a schematic diagram of the land use scope covered by the services of various emergency shelters provided by the embodiment of the present application, indicating the land area covered by the services of the emergency shelters in the area to be evaluated .

[0188] In this embodiment, the superposition module 30 can accurately match the service area of the emergency shelter with the construction land scope of the area to be evaluated through spatial superposition analysis, ensuring the accuracy of the evaluation result. The construction land scope of the area to be evaluated refers to the scope of the urban concentrated construction area and the village construction area, which helps to ensure that the evaluation result can truly reflect the coverage of the emergency shelter in actual use.

[0189] In one embodiment, the evaluation module 40 includes a population unit, a subdivision unit, a density unit, a proportion unit and an evaluation unit;

[0190] Among them, the population unit is used to obtain the total annual population data of the city (county) where the area to be evaluated is located , and obtain the population quantity of each administrative region subdivided into sub-districts (towns) ;

[0191] The population unit is also used to evenly distribute the population quantity of each administrative region subdivided into sub-districts (towns) on the current urban, rural and construction land in the administrative region of the sub-district (town) to obtain the population density of each administrative region subdivided into sub-districts (towns) .

[0192] Among them, the population density of the administrative region is:

[0193]

[0194] Among them, is the population density distribution data of the d-th sub-district (town) administrative region, is the population quantity of the d-th sub-district (town) administrative region, is the area of the d-th sub-district (town) administrative region, represents the total number of sub-districts (towns) involved in the area to be evaluated.

[0195] In this embodiment, the population unit can more accurately evaluate the service capacity of the emergency shelter in each administrative region by subdividing the land area into administrative regions.

[0196] The subdivision unit is used to subdivide the land area by sub-district (town) to obtain the area of the region covered by the emergency shelter service in each sub-district (town) ;

[0197] The density unit is used to calculate the population quantity served by the coverage range of various emergency shelter places in the area to be evaluated based on the regional area and the population density of the administrative region in the area to be evaluated ; The ratio unit is used to calculate the set of population ratios that various emergency shelter places in the area to be evaluated can serve according to the population quantity

[0198] and the total population of the area to be evaluated ; The evaluation unit is used to evaluate the population ratios in the population ratio set. If

[0199] <60%, the service capacity of the emergency shelter in this area is unqualified; if 60% ≤ <80%, the service capacity of the emergency shelter in this area is good; if 80% ≤ <, the service capacity of the emergency shelter in this area is excellent; traverse the population ratios of various emergency shelter places to obtain the evaluation results of the service capacity of various emergency shelter places in the area to be evaluated. Among them, the solution formula for the regional area is: The population quantity is:

[0200] Among them, the solution formula for the regional area is:

[0201]

[0202] The population quantity is:

[0203]

[0204] The population ratio is as follows:

[0205]

[0206] Among them, is the total area of the current construction land in the area to be evaluated covered by various emergency shelter sites, is the service coverage area of the emergency shelter site in the d-th sub-district (township), represents the total number of sub-districts (townships) involved in the area to be evaluated;

[0207] is the number of people served by the coverage scope of various emergency shelter sites in the area to be evaluated, is the population density distribution data of the administrative region of the d-th sub-district (township), is the population quantity of the administrative region of the d-th sub-district (township), is the area of the administrative region of the d-th sub-district (township);

[0208] is the population ratio that the emergency shelter site can serve, is the total population quantity of this area to be evaluated.

[0209] In this embodiment, the population quantity within the service scope of various emergency shelter sites is calculated by combining the subdivision unit, density unit, ratio unit and evaluation unit with the population density of the administrative region. This calculation method takes into account the differences in population distribution, making the evaluation results more targeted.

[0210] For applying the embodiment of the present application, please refer to Figure 7 , Figure 7 is the flowchart for evaluating the service capacity of the emergency shelter site provided by the embodiment of the present application, indicating the general process of evaluating the service capacity of the emergency shelter site in this second embodiment.

[0211] Overall, this embodiment has the following beneficial effects:

[0212] In this application, since the walkability is directly related to whether people can quickly reach the shelter in case of emergency, the actual service scope and service capacity of the emergency shelter can be more accurately evaluated by calculating the walking duration. Through spatial overlay, it can be intuitively shown which areas have effective service coverage and which areas may have service blind spots or insufficient service capacity. Calculating the proportion of the population that various emergency shelters can serve based on the population density and land area of the area to be evaluated, this method fully considers the differences in population distribution; since the population density varies in different regions and the service demands for emergency shelters are also different, by considering the population density, the service capacity of emergency shelters can be more reasonably evaluated; and this method avoids the problem that directly averaging population data to non-construction land will result in a low population density data, making the evaluation result of the service capacity of emergency shelters adapt to the actual population distribution.

[0213] Embodiment III:

[0214] The embodiment of the present application provides a computer-readable storage medium, which includes a stored computer program. Wherein, when the computer program runs, it controls the device where the computer-readable storage medium is located to execute the evaluation method for the service capacity of an emergency shelter.

[0215] Among them, for the evaluation method of the service capacity of an emergency shelter, if it is implemented in the form of a software functional unit and used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above embodiment methods of the present invention, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0216] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. An evaluation method for the service capacity of emergency shelters, characterized in that Including: Obtain the basic data of various emergency shelters and roads in the area to be evaluated; Based on the basic data, calculate the service area area set accessible on foot for various emergency shelters according to the walking time to the various emergency shelters; Perform a spatial overlay on the service area area set and the construction land scope of the area to be evaluated to obtain the land area covered by the emergency shelter service in the area to be evaluated; Calculate the population proportion that various emergency shelters in the area to be evaluated can serve according to the population density and the land area of the area to be evaluated, and obtain the evaluation results of various emergency shelters in the area to be evaluated; Among them, the specific method of calculating the service area area set accessible on foot for various emergency shelters according to the walking time to the various emergency shelters based on the basic data is as follows: Interrupt the intersecting lines of the road centerlines in the basic data, and correct the topological errors in the basic data to obtain a set of road segments; Calculate the walking time set according to the set of road segments at a preset walking speed; Based on the walking time set, in a preset network analysis tool, establish a cost matrix by loading the long-term fixed emergency shelter facility points, short-term fixed emergency shelter facility points, and emergency emergency shelter facility points as starting points and setting the walking direction as leaving the facility points; By defining the walking time as a cost attribute and solving the cost matrix, obtain the service area area set accessible on foot for various emergency shelters; the service area area set includes the area accessible within 90 minutes on foot from the long-term fixed emergency shelter facility points, the area accessible within 40 minutes on foot from the short-term fixed emergency shelter facility points, and the area accessible within 15 minutes on foot from the emergency emergency shelter facility points.

2. The evaluation method for the service capacity of an emergency shelter as described in claim 1, characterized in that, The specific method of performing a spatial overlay on the service area area set and the construction land scope of the area to be evaluated to obtain the land area covered by the emergency shelter service in the area to be evaluated is as follows: Perform a spatial overlay on the service area area set and the construction land scope of the area to be evaluated to obtain a spatial overlay area; among them, the construction land scope of the area to be evaluated refers to the scope of urban concentrated construction areas and village construction areas; Obtain the land area covered by the emergency shelter service in the area to be evaluated by cutting out the area intersection area of the spatial overlay area.

3. The evaluation method for the service capacity of an emergency shelter as described in claim 1, characterized in that, The specific method of calculating the population proportion that various emergency shelters in the area to be evaluated can serve according to the population density and the land area of the area to be evaluated, and obtaining the evaluation results of various emergency shelters in the area to be evaluated is as follows: Subdivide the administrative region of the land area to obtain the area of the region covered by the emergency shelter service of the smallest unit; Based on the area of the region and the population density of the administrative region in the area to be evaluated, calculate the population quantity served by the coverage scope of various emergency shelters in the area to be evaluated; According to the population quantity and the total population of the area to be evaluated, calculate the population proportion that various emergency shelters in the area to be evaluated can serve; Evaluate the population proportion to obtain the evaluation results of the service capabilities of various emergency shelters in the area to be evaluated.

4. The evaluation method for the service capacity of an emergency shelter as described in claim 1, wherein After obtaining the basic data of various emergency shelters and roads in the area to be evaluated, it further includes: Classify the emergency shelters in the basic data according to their scale and functional orientation to obtain the first basic data including long-term fixed emergency shelters, short-term fixed emergency shelters, and emergency emergency shelters; Based on the basic data, eliminate the sections that are not suitable for walking, and classify the routes according to the road level to obtain the second basic data including several emergency shelters and road types; The final basic data is composed of the first basic data and the second basic data.

5. An evaluation device for the service capacity of an emergency shelter, characterized in that, It includes a data module, a duration module, an overlay module, and an evaluation module; Among them, the data module is used to obtain the basic data of various emergency shelters and roads in the area to be evaluated; The duration module is used to calculate the service area area set accessible by walking for various emergency shelters based on the basic data according to the walking duration to various emergency shelters; The overlay module is used to perform spatial overlay on the service area area set and the construction land scope of the area to be evaluated to obtain the land area covered by the emergency shelter service in the area to be evaluated; The evaluation module is used to calculate the population proportion that various emergency shelters in the area to be evaluated can serve according to the population density and the land area of the area to be evaluated, and obtain the evaluation results of various emergency shelters in the area to be evaluated; Among them, the calculation of the service area area set accessible by walking for various emergency shelters based on the basic data according to the walking duration to various emergency shelters is specifically: Interrupt the intersection lines of the road centerlines in the basic data, and correct the topological errors of the basic data to obtain a set of road line segments; Calculate a set of walking times according to the set of road line segments at a preset walking speed; Based on the set of walking times, in a preset network analysis tool, by loading the facility points of long-term fixed emergency shelters, short-term fixed emergency shelters, and emergency emergency shelters as starting points, and setting the walking direction as leaving the facility points, establish a cost matrix; By defining the walking time as a cost attribute and solving the cost matrix, obtain the service area area set accessible by walking for various emergency shelters; the service area area set includes the area accessible within 90 minutes of walking starting from the facility points of long-term fixed emergency shelters, the area accessible within 40 minutes of walking starting from the facility points of short-term fixed emergency shelters, and the area accessible within 15 minutes of walking starting from the facility points of emergency emergency shelters.

6. A storage medium, characterized in that, A computer program is stored on the storage medium, and the computer program is called and executed by a computer to implement an evaluation method for the service capacity of an emergency shelter as described in any one of claims 1 to 4 above.

Images