Electric power line distribution electronic sand table system based on earth GIS map

Abstract

The invention discloses an electronic sand table system for power line distribution based on a ground GIS map. The electronic sand table system comprises a data acquisition module, a GIS fusion module, a modeling module, a line management module, a crossing detection module and a visual display module. According to the electronic sand table system based on the power line distribution of the earth GIS map, a traditional physical sand table is abandoned, multi-terminal access of a computer, a mobile phone and a tablet computer is supported, an off-line cache function is achieved, the problem of data use in network-free environments such as remote mountainous areas and tunnels is solved, and data can be inquired anytime and anywhere. The overhead line is marked with the safe distance boundary, the actual scene is accurately restored in the system, the problem that traditional modeling straight line connection is disjointed with actual wiring is solved, and the line planning deviation rate is reduced. According to the method, the information retrieval and detection efficiency is improved, planning conflicts are found in advance through precise modeling and crossing detection, the modeling precision is improved, the construction cost is reduced, the application range is wide, and the practicability is high.

Description

Technical Field

[0001] This invention belongs to the field of power system information technology, specifically relating to an electronic sand table system based on a geodetic GIS map showing the layout of power lines. Background Technology

[0002] As power systems develop towards intelligence and informatization, the coverage of power lines is constantly expanding and their structure is becoming increasingly complex. Traditional power line management methods are gradually revealing many limitations. Traditional physical sand tables are limited by spatial location, making it impossible to achieve multi-location shared access. They also have high update and maintenance costs, poor flexibility, and are difficult to adapt to the dynamic adjustment needs of lines. Relying on two-dimensional drawings for line management lacks the ability to present three-dimensional space and cannot accurately reflect the spatial relationship between lines and terrain, roads, and buildings, leading to a disconnect between planning schemes and actual construction. Urban cable lines need to be laid along roads, but existing systems often simplify cable lines as straight-line connections without modeling them in conjunction with road orientation. Existing GIS systems mostly rely on network access, making it impossible to retrieve data in remote mountainous areas, tunnels, or other environments without network access. This prevents on-site construction personnel from obtaining real-time line information, affecting construction efficiency. Traditional cross-span detection relies on manual on-site surveys, which are prone to overlooking risk points due to human error. Summary of the Invention

[0003] The technical problem of this invention is to overcome the limitations of traditional physical sand tables by using an electronic sand table system based on a geodetic GIS map to map the power line layout, solve the problems of cable wiring not conforming to reality and data unavailability in the absence of a network environment, improve the accuracy and efficiency of power line management, reduce construction rework costs, and enable visualized management and planning of power lines of various voltage levels from low voltage to ultra-high voltage. The purpose of this invention is to solve the above problems and propose an electronic sand table system for power line layout based on a geodetic GIS map, including: a data acquisition module, a GIS fusion module, a modeling module, a line management module, a crossing detection module, and a visualization display module; The data acquisition module is used to collect basic information of power lines, data of equipment along the line, user information, geographical environment data, and data of existing lines or localized lines, and supports multi-source data access; The GIS fusion module is used to clean and standardize the collected data, and to associate and map the power data with geographic features of the geospatial GIS map through spatial indexing, thereby establishing the correspondence between cable lines, road directions or line parameters, and safety distance standards. The modeling module is used to build 3D models based on fused data. When modeling cable lines, auxiliary points are added according to the road direction to transform straight connections into close-fitting connections along the road direction. When modeling overhead lines, safety distance boundaries are marked. The route management module is used to build a retrieval function based on the data element correspondence established by the GIS fusion module. It includes searching for a single route by keyword, highlighting the route, and querying information on equipment, users, and safety distances along the route. The crossover detection module uses a coordinate collision detection algorithm, combined with safety distance standards, to automatically detect the risk of line crossovers and outputs a detection report containing the difference between the actual distance and the safety distance. The visualization module is used to display 3D models, dynamic route alignment, and conflict point markers, and supports multi-terminal access, offline caching, and data export.

[0004] Furthermore, the data acquisition module, when collecting road alignment data from the geographic environment data, obtains the road centerline coordinates, road width, and road type through a LiDAR scanner or the municipal road management system interface.

[0005] The data collection scope includes: basic line data, equipment data, user data, geographical environment data, and safety standard data.

[0006] The basic data of the line includes voltage level, line type, starting and ending stations, line length and laying method.

[0007] The equipment data includes tower type, cable well parameters, transformer capacity, and switchgear location coordinates.

[0008] User data includes the names of electricity-consuming units along the route, the number of households, electricity load, and contact information.

[0009] Geographic environment data includes topography, road alignment data, and administrative divisions; among which, road alignment data includes the coordinates of the road centerline, width, and type.

[0010] Safety standard data includes safety distance standards for lines of different voltage levels, coordinate ranges and ownership information of existing lines or localized lines.

[0011] Furthermore, multi-source data access includes manual data entry via the web, data collection via GPS locators, pole tilt sensors, and integration with third-party systems such as the power marketing system, municipal road management system, and geographic information database.

[0012] Preferably, when modeling cable lines, auxiliary points are added according to the road direction. They are automatically added along key locations such as road turning points and intersections, and the coordinates of the auxiliary points are accurately matched with the coordinates of the road centerline.

[0013] Preferably, the safety distance standard adopts a dynamic adaptation principle, automatically retrieving the corresponding safety distance standard according to the line type and voltage level. When the actual line distance is detected to be less than the safety distance standard, the conflict area is marked and adjustment suggestions are output.

[0014] Furthermore, the offline caching function of the visualization module supports the download of data for custom areas. The cached data includes the 3D model of the line, equipment parameters, and safety distance standards, and can be retrieved normally in environments without a network.

[0015] The visualization module includes multi-terminal adaptation, offline caching, and dynamic demonstrations.

[0016] Multi-terminal adaptation: PC version: Supports Windows and macOS systems, provides a full-featured interface, and supports mouse drag rotation and scroll wheel zoom of the model.

[0017] Mobile: Supports Android and iOS systems, features a simplified interface, and supports gesture controls.

[0018] Tablet version: Supports split-screen display, adapts to landscape or portrait display, making it convenient for on-site construction personnel to view the model and record data at the same time.

[0019] Offline caching function: Cache range: Users can customize the cache area. The cached data includes the 3D model of the line, equipment parameters, and safety distance standards. The data size of a single cache area is ≤500MB.

[0020] Cache management: Supports updating and deleting cached data, and the cache validity period can be set.

[0021] Offline use: In the absence of a network environment, users can open cached models, search for lines, and view related information normally, but cannot initiate cross-traffic detection.

[0022] Dynamic demonstration: Supports dynamic simulation of the line laying process, with adjustable demonstration speed, facilitating solution briefing and training.

[0023] Furthermore, the keyword search function in the line management module supports searching by line name, voltage level, line type, and origin and destination stations, with a search response time of ≤1 second and a related information query coverage of ≥99%.

[0024] The route management module includes precise search functionality, linked query functionality, and data export functionality; The precise search function includes: Search methods: Supports single keyword and multi-keyword combination search, and search results are sorted in real time, from high to low matching degree.

[0025] Response efficiency: Results are returned within 1 second after a search request is sent, and fuzzy search is supported.

[0026] Highlighting: After the target route is retrieved, the system automatically highlights the route in the 3D model with a highlight color, while hiding unrelated routes for easy focus and viewing.

[0027] Related query function: Equipment Inquiry: Click on equipment such as poles, towers, and cable wells in the model to bring up an information pop-up window, displaying information such as equipment model, installation date, maintenance records, and responsible person.

[0028] User query: Supports filtering users by administrative division along the line and power load range, and displays user name, power address and load data.

[0029] Safe distance query: Query the safe distance between the route and surrounding buildings and trees. If the distance is insufficient, the risk level will be automatically marked.

[0030] Data Export: Supports exporting search results and related information to Excel and PDF formats. Exported files include line parameter tables, equipment lists, and user distribution maps, facilitating offline archiving and reporting.

[0031] Preferably, the GIS fusion module adopts the WGS-84 coordinate system, with a data fusion error of ≤0.5 meters, eliminating data redundancy and format differences, and providing a unified data foundation for subsequent modeling and detection. Furthermore, the GIS fusion module includes data cleaning, such as deduplication and error correction, of the collected multi-source data, followed by standardization processing.

[0032] Preferably, in the GIS fusion module, spatial association fusion adopts the R-tree spatial indexing algorithm to associate and map power data with geographic features of the geodetic GIS map, including the following steps: 1) Link cable line data with road alignment data to establish a mapping relationship between cable start and end points and road centerline; 2) Link line parameters with safety distance standards and establish a correspondence table of voltage level, line type and safety distance.

[0033] Preferably, in the GIS fusion module, the terrain adaptive calibration algorithm is used to ensure the fusion accuracy control, providing a precise data foundation for subsequent modeling and detection.

[0034] Preferably, the modeling module adopts BIM building information modeling and GIS fusion technology, builds a three-dimensional model based on the Unity3D engine, and supports real-time model rendering and detail optimization.

[0035] The modeling content includes: overhead line modeling and cable line modeling.

[0036] Overhead line modeling includes terrain modeling, line modeling, and safety distance marking.

[0037] Terrain modeling: Import the GIS-integrated terrain data to restore terrain features such as mountains, plains, and rivers, with an elevation error of ≤0.3 meters.

[0038] Line modeling: Based on the conductor type, the conductor diameter and sag curve are reconstructed, and the conductor erection height is calculated in combination with the tower coordinates to ensure that the line route is consistent with the actual situation.

[0039] Safety distance marking: Based on safety distance standards, safety distance boundaries are marked in the model with semi-transparent 3D boxes, and the boundary color is associated with the line voltage level.

[0040] Cable line modeling includes auxiliary point generation, path fitting, and equipment reconstruction; Auxiliary point generation: The system automatically identifies road turning points and intersections, and adds auxiliary points according to the rule of 1 turning point every 50 meters. The coordinates of the auxiliary points deviate from the coordinates of the road centerline by ≤0.2 meters.

[0041] Path fitting: The starting and ending points of the cable line are connected with auxiliary points using the Bézier curve algorithm to form a smooth path along the road, with the deviation between the path and the road edge ≤ 0.5 meters.

[0042] Equipment restoration: Model cable wells and cable trenches according to actual dimensions, and label them with equipment numbers and maintenance records.

[0043] Preferably, the cross-crossing detection module includes detection triggering methods, dynamic adaptation of safe distance, and conflict detection and analysis.

[0044] Detection triggering method: Supports automatic and manual detection. The system automatically detects all lines every day at midnight, and users can select a specific line to initiate the detection.

[0045] Dynamic adaptation of safe distance: Standard retrieval: Automatically matches the State Grid safety distance standard based on line type and voltage level.

[0046] Dynamic adjustment: For special scenarios, the system automatically adjusts the safety distance calculation benchmark.

[0047] Conflict Detection and Analysis: Coordinate comparison: The separation axis theorem algorithm is used to compare the three-dimensional coordinates of the target route with those of existing routes, underground pipelines, and road facilities point by point to detect whether there is spatial overlap.

[0048] Risk assessment: If the actual distance is less than the safe distance standard, it is considered a conflict, and the risk level is determined according to the ratio of the actual distance to the safe distance.

[0049] Report Output: After the inspection is completed, an inspection report is generated, which includes the coordinates of the conflict points, information on the lines involved, the difference between the actual distance and the safe distance, and adjustment suggestions. Key information in the report can be viewed through the cross-point pop-up window.

[0050] Compared with the prior art, the beneficial effects of the present invention include: 1) This invention is based on an electronic sand table system for power line distribution based on a geodetic GIS map. It abandons the traditional physical sand table, supports access from multiple terminals such as computers, mobile phones and tablets, and has an offline caching function to solve the data usage problem in remote mountainous areas, tunnels and other environments without network access, so as to realize data access anytime and anywhere.

[0051] 2) In the electronic sand table system of the present invention, cable lines are modeled with auxiliary points to fit the road direction, and overhead lines are marked with safe distance boundaries. The actual scene is accurately reproduced in the system, which solves the problem of the disconnect between the traditional modeling of straight connection and the actual wiring, and reduces the deviation rate of line planning.

[0052] 3) This invention is based on an electronic sand table system for power line layout based on a geodetic GIS map, which improves information retrieval and detection efficiency, and can detect planning conflicts in advance through accurate modeling and cross-crossing detection, thereby improving modeling accuracy and reducing construction costs. It has a wide range of applications and strong practicality. Attached Figure Description

[0053] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0054] Figure 1 This is a schematic diagram of the overall architecture of the electronic sand table system according to an embodiment of the present invention.

[0055] Figure 2 This is a schematic diagram of the GIS fusion and modeling process according to an embodiment of the present invention.

[0056] Figure 3 This is a schematic diagram of the interface for the line management and crossover detection functions in an embodiment of the present invention.

[0057] Figure 4 This is a schematic diagram illustrating multi-terminal access adaptation in an embodiment of the present invention. Detailed Implementation

[0058] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0059] This invention takes a 220kV overhead line planning project in a certain city as an example. The line is 35 kilometers long and passes through three types of terrain: urban areas, suburbs, and mountains. It needs to cross three existing 110kV lines and two urban main roads. The planned construction period is 6 months. It is necessary to solve the problems of the line planning crossing the existing lines, mountain terrain modeling, and data access in construction scenarios without network access.

[0060] Hardware deployment: Servers: Two high-performance cloud servers are used: CPU 16 cores, memory 64G, storage 2TB, to achieve data redundancy backup; Data collection equipment: GPS positioning devices are used to collect tower coordinates, and LiDAR scanners are used to collect terrain and road data; Data collection and access: Line data: Enter the starting and ending stations of the 220kV East Ring Line as Chengdong Substation-Xijiao Substation, conductor type LGJ-630 / 45, and number of towers as 120; Environmental data: Access to road alignment data provided by the municipal system, including the centerline coordinates of 3 main roads and the coordinates of existing 110kV power lines; User data: Electricity consumption information of 52 corporate users and 1,200 residential users along the route was imported from the electricity marketing system.

[0061] like Figure 1 As shown, an electronic sand table system for power line distribution based on a geodetic GIS map includes: a data acquisition module, a GIS fusion module, a modeling module, a line management module, a crossing detection module, and a visualization module. The data acquisition module is used to collect basic information of power lines, data of equipment along the line, user information, geographical environment data, and data of existing lines or localized lines, and supports multi-source data access.

[0062] When collecting road alignment data from geographic environment data, the data acquisition module obtains the coordinates of the road centerline, road width, and road type through a LiDAR scanner or the municipal road management system interface.

[0063] The data collection scope includes: basic line data, equipment data, user data, geographical environment data, and safety standard data.

[0064] Basic line data includes voltage level, line type, starting and ending stations, line length, and laying method; Equipment data includes tower type, cable well parameters, transformer capacity, and switchgear location coordinates; User data includes the names of electricity-consuming units along the route, the number of households, electricity load, and contact information; Geographic environment data includes topography, road alignment data, and administrative divisions; among which, road alignment data includes road centerline coordinates, width, and type. Safety standard data includes safety distance standards for lines of different voltage levels, coordinate ranges and ownership information of existing lines or localized lines.

[0065] Multi-source data access includes manual data entry via the web, data collection via GPS locators, pole tilt sensors, and integration with third-party systems such as power marketing systems, municipal road management systems, and geographic information databases.

[0066] like Figure 2 As shown, the GIS fusion module is used to clean and standardize the collected data, and to associate and map power data with geographic features on the geodetic GIS map through spatial indexing, thereby establishing the correspondence between cable lines, road directions or line parameters, and safety distance standards. Within the GIS fusion module, a terrain-adaptive calibration algorithm ensures fusion accuracy control, providing a precise data foundation for subsequent modeling and detection.

[0067] The GIS fusion module adopts the WGS-84 coordinate system, with a data fusion error of ≤0.5 meters, eliminating data redundancy and format differences, and providing a unified data foundation for subsequent modeling and detection. The GIS fusion module includes data cleaning, such as deduplication and error correction, of collected multi-source data, followed by standardization processing.

[0068] In the GIS fusion module, spatial association fusion uses the R-tree spatial indexing algorithm to associate and map power data with geographic features on the geodetic GIS map, including the following steps: 1) Link cable line data with road alignment data to establish a mapping relationship between cable start and end points and road centerlines; 2) Link line parameters with safety distance standards and establish a correspondence table of voltage level - line type - safety distance.

[0069] The modeling module is used to build 3D models based on fused data. When modeling cable lines, auxiliary points are added according to the road direction to transform straight connections into close-fitting connections along the road direction. When modeling overhead lines, safety distance boundaries are marked. When modeling cable lines, auxiliary points are added based on the road direction. They are automatically added at key locations such as road turning points and intersections, and the coordinates of the auxiliary points are precisely matched with the coordinates of the road centerline.

[0070] The modeling module uses BIM (Building Information Modeling) and GIS fusion technology to build 3D models based on the Unity3D engine, supporting real-time model rendering and detail optimization.

[0071] The modeling content includes: overhead line modeling and cable line modeling; Overhead line modeling includes terrain modeling, line modeling, and safety distance marking; Terrain modeling: Import the GIS-integrated terrain data to reconstruct terrain features such as mountains, plains, and rivers, with an elevation error of ≤0.3 meters; Line modeling: Based on the conductor type, the conductor diameter and sag curve are reconstructed, and the conductor erection height is calculated in combination with the tower coordinates to ensure that the line route is consistent with the actual situation; Safety distance marking: Based on safety distance standards, safety distance boundaries are marked in the model with semi-transparent 3D boxes, and the boundary color is associated with the line voltage level.

[0072] Cable line modeling includes auxiliary point generation, path fitting, and equipment reconstruction; Auxiliary point generation: The system automatically identifies road turning points and intersections, and adds auxiliary points according to the rule of 1 turning point every 50 meters. The coordinates of the auxiliary points deviate from the coordinates of the road centerline by ≤0.2 meters. Path fitting: The start and end points of the cable line are connected with auxiliary points using the Bézier curve algorithm to form a smooth path along the road direction, with the deviation between the path and the road edge ≤ 0.5 meters; Equipment restoration: Model cable wells and cable trenches according to actual dimensions, and label them with equipment numbers and maintenance records.

[0073] like Figure 3 As shown, the route management module is used to build a retrieval function based on the data element correspondence established by the GIS fusion module. It includes searching for a single route by keyword, highlighting the route, and querying information on equipment, users, and safety distances along the route. The keyword search function in the line management module supports searching by line name, voltage level, line type, and origin and destination stations. The search response time is ≤1 second, and the coverage rate of related information queries is ≥99%.

[0074] The route management module includes precise search functionality, linked query functionality, and data export functionality; The precise search function includes: Search methods: Supports single keyword and multi-keyword combination search, and the search results are sorted in real time, from high to low matching degree; Response efficiency: Results are returned within 1 second after a search request is sent; fuzzy search is supported. Highlighting: After the target route is retrieved, the system automatically highlights the route in the 3D model with a highlight color, while hiding unrelated routes for easy focus and viewing; Related query function: Equipment Inquiry: Click on equipment such as poles, towers, and cable wells in the model to bring up an information pop-up window, displaying information such as equipment model, installation date, maintenance records, and responsible person; User query: Supports filtering users by administrative division along the line and power load range, and displays user name, power address and load data; Safe distance query: Query the safe distance between the route and surrounding buildings and trees. If the distance is insufficient, the risk level will be automatically marked. Data Export: Supports exporting search results and related information to Excel and PDF formats. Exported files include line parameter tables, equipment lists, and user distribution maps, facilitating offline archiving and reporting.

[0075] The crossover detection module uses a coordinate collision detection algorithm, combined with safety distance standards, to automatically detect the risk of line crossovers and outputs a detection report containing the difference between the actual distance and the safety distance.

[0076] The cross-crossing detection module includes detection triggering methods, dynamic adaptation of safe distance, and conflict detection and analysis.

[0077] Detection triggering method: Supports automatic and manual detection. The system automatically detects all lines every day at midnight, and users can select a specific line to initiate the detection. Dynamic adaptation of safe distance: Standard retrieval: Automatically matches the State Grid's safety distance standards based on line type and voltage level; Dynamic adjustment: For special scenarios, the system automatically adjusts the safety distance calculation benchmark; Conflict Detection and Analysis: Coordinate comparison: The separation axis theorem algorithm is used to compare the three-dimensional coordinates of the target route with those of existing routes, underground pipelines, and road facilities point by point to detect whether there is spatial overlap. Risk assessment: If the actual distance is less than the safe distance standard, it is considered a conflict, and the risk level is determined according to the ratio of the actual distance to the safe distance; Report Output: After the inspection is completed, an inspection report is generated, which includes the coordinates of the conflict points, information on the lines involved, the difference between the actual distance and the safe distance, and adjustment suggestions. Key information in the report can be viewed through the cross-point pop-up window.

[0078] The safety distance standard adopts a dynamic adaptation principle, automatically retrieving the corresponding safety distance standard based on the line type and voltage level. When the actual line distance is detected to be less than the safety distance standard, the conflict area is marked and adjustment suggestions are output.

[0079] The offline caching function of the visualization module supports the download of data for custom areas. The cached data includes 3D models of lines, equipment parameters, and safety distance standards, and can be retrieved normally in environments without a network.

[0080] like Figure 4 As shown, the visualization module is used to display 3D models, dynamic route alignment, and conflict point markers, and supports multi-terminal access, offline caching, and data export.

[0081] The visualization module includes multi-terminal adaptation, offline caching, and dynamic demonstrations; Multi-terminal adaptation: PC version: Supports Windows and macOS systems, provides a full-featured interface, and supports mouse drag rotation and scroll wheel zoom of the model; Mobile: Supports Android and iOS systems, features a simplified interface, and supports gesture controls; Tablet version: Supports split-screen display, adapts to landscape or portrait display, making it convenient for on-site construction personnel to view the model and record data at the same time; Offline caching function: Cache range: Users can customize the cache area. The cached data includes the 3D model of the line, equipment parameters, and safety distance standards. The data size of a single cache area is ≤500MB. Cache management: Supports updating and deleting cached data; cache validity period can be set. Offline use: In the absence of a network environment, users can open cached models, search for lines, and view related information normally, but cannot initiate cross-cross detection; Dynamic demonstration: Supports dynamic simulation of the line laying process, with adjustable demonstration speed, facilitating solution briefing and training.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power line route planning electronic sand table system based on a terrestrial GIS map, characterized in that, The utility model relates to a kind of power line management system, including: Data acquisition module, GIS fusion module, modeling module, line management module, cross-span detection module and visual display module; The data acquisition module is used to collect power line basic information, along-line equipment data, user information, geographic environment data, and built line or territorial line data, and supports multi-source data access; The GIS fusion module is used to clean and standardize the collected data, and associate and map the power data with the geographic elements of the GIS map through spatial indexing, and then establish the corresponding relationship of cable line, road direction or line parameter, safety distance standard; The modeling module is used to construct a three-dimensional model based on the fusion data, wherein auxiliary points are added according to the road direction when modeling the cable line, converting the straight-line connection into a fitting connection along the road direction, and marking the safety distance boundary when modeling the overhead line; The line management module is used to construct a retrieval function based on the data element correspondence established by the GIS fusion module, including keyword retrieval of a single line, highlighting the line direction, and associated query of along-line equipment, user and safety distance information; The cross-span detection module uses a coordinate collision detection algorithm to automatically detect line cross-span risks in combination with safety distance standards, and outputs a detection report containing the actual distance and the safety distance difference; The visual display module is used to display the three-dimensional model, line dynamic direction, conflict point marking, and supports multi-terminal access, offline caching and data export.

2. The electronic sand table system for power line route planning based on GIS map of the earth according to claim 1, characterized in that, When collecting road direction data in the geographic environment data, the data acquisition module obtains the road centerline coordinates, road width and road type through a laser radar scanner or a municipal road management system interface.

3. The electronic sand table system for power line route planning based on GIS map of the earth according to claim 1, characterized in that, The multi-source data access includes manual input through a web terminal, collection through a GPS positioning instrument and a tower inclination sensor, and third-party system docking of a power marketing system, a municipal road management system and a geographic information database.

4. The electronic sand table system for power line route planning based on GIS map of the earth according to claim 1, characterized in that, When modeling the cable line, auxiliary points are added according to the road direction, and are automatically added at key positions such as road turning points and intersections, with accurate matching of the auxiliary point coordinates and the road centerline coordinates.

5. The electronic sand table system for power line route planning based on GIS map of the earth according to claim 1, characterized in that, The safety distance standard adopts a dynamic adaptation principle, automatically retrieves the corresponding safety distance standard according to the line type and voltage level, and when the actual distance of the line is less than the safety distance standard, marks the conflict area and outputs adjustment suggestions.

6. The electronic sand table system for power line route planning based on GIS map of the earth according to claim 1, characterized in that, The offline caching function of the visual display module supports custom area data download, and the cached data includes line three-dimensional model, equipment parameter, safety distance standard, and supports normal retrieval in a network-free environment.

7. The electronic sand table system for power line route planning based on GIS map of the earth according to claim 1, characterized in that, The keyword retrieval in the line management module supports line name, voltage level, line type, start and end station retrieval, with a retrieval response time ≤1 second and an associated information query coverage ≥99%.

8. The electronic sand table system for power line route planning based on GIS map of the earth according to claim 1, characterized in that, The GIS fusion module uses the WGS-84 coordinate system, with a data fusion error ≤0.5 meters, eliminating data redundancy and format differences, and providing a unified data basis for subsequent modeling and detection.

9. The electronic sand table system for power line route planning based on GIS map of the earth according to claim 1, characterized in that, The GIS fusion module also includes data cleaning for de-duplication and error correction of the collected multi-source data, and then standardization processing.

10. The electronic sand table system for power line route planning based on GIS map of the earth according to claim 1, characterized in that, The modeling module adopts Unity3D engine to build a three-dimensional model, supports detail zoom, rotation view and cross-section mode.

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