A method and system for delivering three-dimensional geographic information data for power transmission and transformation projects

Abstract

This invention discloses a method for delivering three-dimensional geographic information data for power transmission and transformation projects, relating to the field of power engineering technology. The method includes: acquiring and preprocessing digital orthophoto image data and digital elevation model data; using an information review platform to review the accuracy of the geographic information data; and converting the geographic information data format for unified delivery. The method provided by this invention ensures consistency in design depth requirements across different levels of departments by limiting the design accuracy of digital orthophoto image data and digital elevation model data. It reviews the accuracy of the data map to meet the geographic information data requirements of line projects and converts the format to adapt to the standardization of the surveying and mapping industry and local units. Through accuracy control during the review process and the use of integrated scale and principal component analysis, the method ensures that the data meets engineering needs and that the depth of data exploration is consistent across different levels of units.

Description

Technical Field

[0001] This invention relates to the field of power engineering technology, specifically to a method and system for delivering three-dimensional geographic information data for power transmission and transformation projects. Background Technology

[0002] With the rapid advancement of urbanization and the high-speed development of urban economies, the pace of urban construction has accelerated dramatically. This is reflected in the renovation of old cities, the construction of new cities, and the widening of roads, resulting in a constantly changing urban landscape. Simultaneously, the basic spatial data of cities must also continuously evolve. Data is a core component of 3D geographic information systems and the foundational data for building digital geospatial frameworks. To meet the needs of urban informatization, digital city construction, and even smart city development, the continuous updating of information systems is imperative, and data updates are of paramount importance.

[0003] Existing methods for transferring geographic information data have the following problems:

[0004] The accuracy of geographic information data may vary at different stages of production and handover, which may result in the final data not meeting the requirements of the pipeline project. For example, the resolution or grid spacing of the data may vary due to differences in acquisition methods, processing methods, or storage formats.

[0005] Existing national standards, surveying and mapping industry standards, power industry standards, and enterprise standards may differ, potentially leading to issues with the quality and consistency of geographic information data. For example, different standards may set different requirements for data format, metadata, accuracy, and other aspects.

[0006] In existing technologies, the format conversion of geographic information data may require specialized GIS software or programming knowledge, which may lead to issues with the efficiency and accuracy of data delivery.

[0007] Therefore, there is an urgent need for a method to deliver three-dimensional geographic information data for power transmission and transformation projects. Summary of the Invention

[0008] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0009] In view of the above-mentioned problems, the present invention is proposed.

[0010] Therefore, the technical problem solved by this invention is that existing three-dimensional geographic information data delivery methods suffer from inconsistent data design depth, inconsistent data standards, and the optimization problem of how to unify the format.

[0011] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a method for delivering three-dimensional geographic information data for power transmission and transformation projects, comprising:

[0012] Collect and preprocess digital orthophoto image data and digital elevation model data;

[0013] The information verification platform verifies the accuracy of geographic information data.

[0014] Convert geographic information data formats for unified delivery.

[0015] As a preferred embodiment of the three-dimensional geographic information data delivery method for power transmission and transformation projects described in this invention, the acquisition and preprocessing of digital orthophoto image data and digital elevation model data includes satellite imagery, aerial imagery and orthophoto map to form digital orthophoto image data, and contour lines, elevation discrete points and raster data to form digital elevation model data.

[0016] The resolution of the digital orthophoto data must be less than 2.1m and greater than 2.2m, and the grid spacing of the digital elevation model data must be greater than 30m and less than 35m.

[0017] When the resolution of digital orthophoto data does not meet the requirements, the data delivery direction is determined. When delivering from a high-level central power station to a low-level local power station, digital orthophoto data with a resolution higher than 2.1m is resampled to reduce the resolution, while digital orthophoto data with a resolution lower than 2.2m is interpolated to increase the resolution. When delivering from a low-level local power station to a high-level central power station, digital orthophoto data with a resolution higher than 2.2m is delivered directly, while data with a resolution lower than 2.2m is interpolated to increase the resolution.

[0018] When the grid spacing of the digital elevation model data does not meet the requirements, the data delivery direction is determined. When the data is delivered from the high-level central power station to the low-level local power station, the grid spacing is corrected by upsampling and downsampling the digital elevation model data through CNN and GAN networks. When the data is delivered from the low-level local power station to the high-level central power station, the terrain information at multiple scales is mixed and calculated to obtain the average value to correct the grid spacing.

[0019] As a preferred embodiment of the three-dimensional geographic information data delivery method for power transmission and transformation projects described in this invention, the geographic information data accuracy verification includes ensuring that the planar position error of the orthophoto map of flat land and hilly areas is less than 0.6 mm on the map, and the planar position error of the orthophoto map of mountainous and high mountain areas is less than 0.8 mm on the map. After verification, an optimal scale is constructed: the ground resolution is set to ≤0.10 and the scale is selected as 1:1000; the ground resolution is set to ≤0.20 and the scale is selected as 1:2000; the ground resolution is set to ≤0.50 and the scale is selected as 1:5000; the ground resolution is set to ≤1.00 and the scale is selected as 1:10000.

[0020] If the error is greater than the preset value, it is considered that the data does not meet the requirements of the power transmission and transformation project. Different data sources are obtained through satellite imagery, data captured by drones, and ground lidar scanning. Multi-source data fusion is performed, and data that does not meet the threshold is replaced and filled. After the data fusion is completed, the accuracy is reviewed again. If the data passes the review, the optimal scale is adopted.

[0021] If the data fusion process has not undergone accuracy verification, the data transmission direction is determined. When data is transmitted from a higher-level unit to a lower-level unit, a fusion scale is constructed. If the ground resolution is set to ≤0.13, the scale is selected as 1:1000; if the ground resolution is set to ≤0.25, the scale is selected as 1:2000; if the ground resolution is set to ≤0.59, the scale is selected as 1:5000; if the ground resolution is set to ≤1.11, the scale is selected as 1:10000.

[0022] When data is transmitted from a lower-level unit to a higher-level unit, the higher-level unit extracts features based on historical geographic data, and then matches the extracted features with the historical geographic data to obtain geographic information data that meets the accuracy threshold.

[0023] As a preferred embodiment of the three-dimensional geographic information data delivery method for power transmission and transformation projects described in this invention, the accuracy verification of the geographic information data further includes that the accuracy of the digital elevation model is not lower than the first-level accuracy requirement within the boundary line range, the accuracy is not lower than the second-level accuracy requirement within 100m on both sides of the line, and the accuracy is not lower than the third-level accuracy requirement in the remaining area.

[0024] The first-level accuracy requirements include: ≤0.4m for flat terrain, ≤0.5m for hilly terrain, ≤1.2m for mountainous terrain, and ≤1.5m for high mountain terrain;

[0025] Level 2 accuracy requirements include: ≤0.5m for flat terrain, ≤0.7m for hilly terrain, ≤1.5m for mountainous terrain, and ≤2m for high mountainous terrain;

[0026] The accuracy requirements for Level 3 are as follows: ≤0.5m for flat terrain, ≤1.05m for hilly terrain, ≤2.25m for mountainous terrain, and ≤3m for high mountainous terrain;

[0027] If the error is greater than the preset value, it is considered that the data does not meet the requirements of the power transmission and transformation project. It is then determined whether the accuracy within the boundary line range meets the preset accuracy. If the accuracy within the boundary line range meets the preset accuracy requirement, the two 100m ranges of the line and the remaining area are decomposed into blocks, principal component analysis is performed, power facilities within the 100m range on both sides of the line and the remaining area are screened, and the positions of the power facilities are re-collected to ensure that the positions of the power facilities meet the accuracy requirements.

[0028] If the accuracy within the boundary area does not meet the requirements, the data is considered unusable, and a new digital elevation model is constructed.

[0029] As a preferred embodiment of the three-dimensional geographic information data delivery method for power transmission and transformation projects described in this invention, the geographic information data accuracy verification further includes constructing a ground feature modeling range of 75 meters on both sides of the centerline of the transmission line path for voltage levels of 750kV and above, and a ground feature modeling range of 50 meters on both sides of the centerline of the transmission line path for voltage levels of 500kV and below, with a resolution of not less than 0.1 meters reflecting the location and size of the crossing objects.

[0030] As a preferred embodiment of the three-dimensional geographic information data delivery method for power transmission and transformation projects described in this invention, the conversion of geographic information data format includes: performing digital design of power transmission lines, collecting and producing power grid thematic data, power grid spatial data, and power transmission line corridor data, and integrating them with geographic information data; plotting the boundaries of the power transmission line corridor data in the geographic information data and indicating the area name; performing three-dimensional modeling conversion on the models of railways, highway grades, forests, rivers, overhead pipelines, underground cables, underground communication lines, underground pipelines, cable tunnels, integrated utility tunnels, and overhead line crossings within the corridor area; if the geographic data has already undergone principal component analysis processing, then only the data within the remaining non-boundary area after processing is fused with power grid spatial data.

[0031] As a preferred embodiment of the three-dimensional geographic information data delivery method for power transmission and transformation projects described in this invention, the conversion of geographic information data format further includes performing digital design of power transmission lines, collecting and producing power grid thematic data, power grid spatial data, and power transmission line corridor data, and integrating them with geographic information data to complete the integration, converting the power grid spatial data into tif, img, asc, shp, and tab formats, and converting the power grid thematic data and power transmission line corridor data into shp and tab data.

[0032] Another objective of this invention is to provide a system for delivering three-dimensional geographic information data for power transmission and transformation projects. This system can unify the data depth by limiting the range of digital orthophoto data and digital elevation model data, thus solving the problem that the content and accuracy of geographic information data in existing geographic information data delivery methods are inconsistent with the design depth requirements.

[0033] A three-dimensional geographic information data delivery system for power transmission and transformation projects, characterized in that it includes a data processing module, an accuracy verification module, and a format conversion module;

[0034] The data processing module is deployed in power plants at different levels to collect and process data, and to standardize the accuracy of the data on the map.

[0035] The accuracy review module is used to review and determine the accuracy of the drawing to ensure that the markings on the data drawing are in the corresponding positions;

[0036] The format conversion module is used to integrate power grid information and geographic information, and to perform a unified format conversion on the integrated data.

[0037] A computer device includes a memory and a processor, the memory storing a computer program, characterized in that the processor executes the computer program to implement the steps of a method for delivering three-dimensional geographic information data of power transmission and transformation projects.

[0038] A computer-readable storage medium having a computer program stored thereon, characterized in that, when the computer program is executed by a processor, it implements the steps of a method for delivering three-dimensional geographic information data of power transmission and transformation projects.

[0039] The beneficial effects of this invention are as follows: The method for delivering 3D geographic information data for power transmission and transformation projects provided by this invention ensures consistency in design depth requirements across different levels of departments by limiting the design accuracy of digital orthophoto image data and digital elevation model data. It reviews the accuracy of the data map to meet the geographic information data requirements of power transmission projects and converts formats to adapt to the standardization of the surveying and mapping industry and local units. Through accuracy control during the review process and the use of integrated scale and principal component analysis, it ensures that the data meets engineering needs and that the depth of data exploration is consistent across different levels of units. This invention achieves better results in terms of design depth, design accuracy, and format uniformity. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0041] Figure 1 The first embodiment of the present invention provides an overall flowchart of a method for delivering three-dimensional geographic information data for power transmission and transformation projects.

[0042] Figure 2 The following is an overall flowchart of a three-dimensional geographic information data delivery system for power transmission and transformation projects, provided as a third embodiment of the present invention. Detailed Implementation

[0043] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0046] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0047] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] Example 1

[0050] Reference Figure 1 As an embodiment of the present invention, a method for delivering three-dimensional geographic information data for power transmission and transformation projects is provided, comprising:

[0051] S1: Acquire digital orthophoto image data and digital elevation model data and perform preprocessing.

[0052] Furthermore, digital orthophoto data and digital elevation model data are collected and preprocessed, including satellite imagery, aerial imagery, and orthophoto maps to form digital orthophoto data, and contour lines, elevation discrete points, and raster data to form digital elevation model data.

[0053] It should be noted that the resolution of digital orthophoto data is lower than 2.1m and higher than 2.2m, and the grid spacing of digital elevation model data is higher than 30m and lower than 35m.

[0054] When the resolution of digital orthophoto data does not meet the requirements, the data delivery direction is determined. When delivering from a high-level central power station to a low-level local power station, digital orthophoto data with a resolution higher than 2.1m is resampled to reduce the resolution, while digital orthophoto data with a resolution lower than 2.2m is interpolated to improve the resolution. When delivering from a low-level local power station to a high-level central power station, digital orthophoto data with a resolution higher than 2.2m is delivered directly, while data with a resolution lower than 2.2m is interpolated to improve the resolution.

[0055] When the grid spacing of the digital elevation model data does not meet the requirements, the data delivery direction is determined. When the data is delivered from the high-level central power station to the low-level local power station, the grid spacing is corrected by upsampling and downsampling the digital elevation model data through CNN and GAN networks. When the data is delivered from the low-level local power station to the high-level central power station, the terrain information at multiple scales is mixed and calculated to obtain the average value to correct the grid spacing.

[0056] It should be noted that the resolution is set to be between 2.1m and 2.2m, and the grid spacing is set to be between 30m and 35m because some higher-level units have more sophisticated equipment that allows for more in-depth research, while the equipment of some local units is not sufficient to study the data generated by higher-level units. Therefore, data design is carried out. In order to ensure that the design depth is sufficient to support the research of power engineering, the minimum resolution and grid spacing are set. In order to avoid the situation where the equipment of some county-level units cannot meet the on-map accuracy design of resolution and grid spacing, the maximum resolution and grid spacing are set.

[0057] S2: The information review platform conducts accuracy reviews of geographic information data.

[0058] Furthermore, the accuracy review of geographic information data includes ensuring that the planar position error of orthophoto maps of flat land and hilly areas is less than 0.6 mm on the map, and the planar position error of orthophoto maps of mountains and high mountains is less than 0.8 mm on the map. Data that fails the review is fed back to the design unit, which then re-collects and reconstructs the data for the error areas. After the review is passed, the optimal scale is constructed: a ground resolution of ≤0.10 is set to a scale of 1:1000, a ground resolution of ≤0.20 is set to a scale of 1:2000, a ground resolution of ≤0.50 is set to a scale of 1:5000, and a ground resolution of ≤1.00 is set to a scale of 1:10000.

[0059] It should be noted that the accuracy review of geographic information data also includes that the accuracy of the digital elevation model within the boundary line is not lower than the first-level accuracy requirement, the accuracy within 100m on both sides of the line is not lower than the second-level accuracy requirement, and the accuracy of the remaining area is not lower than the third-level accuracy requirement.

[0060] The first-level accuracy requirements include: ≤0.4m for flat terrain, ≤0.5m for hilly terrain, ≤1.2m for mountainous terrain, and ≤1.5m for high mountain terrain.

[0061] Level 2 accuracy requirements include: ≤0.5m for flat terrain, ≤0.7m for hilly terrain, ≤1.5m for mountainous terrain, and ≤2m for high mountainous terrain.

[0062] The accuracy requirements for Level 3 are as follows: ≤0.5m for flat terrain, ≤1.05m for hilly terrain, ≤2.25m for mountainous terrain, and ≤3m for high mountainous terrain.

[0063] If the error exceeds the preset value, the data is considered not to meet the requirements of the power transmission and transformation project. Different data sources are obtained through satellite imagery, data captured by drones, and ground-based lidar scanning. Multi-source data fusion is performed, and data with errors that do not meet the threshold are replaced and filled. After the data fusion is completed, the accuracy is reviewed again. If the data passes the review, the optimal scale is adopted.

[0064] If the data fusion process has not undergone accuracy verification, the data transmission direction is determined. When data is transmitted from a higher-level unit to a lower-level unit, a fusion scale is constructed. If the ground resolution is set to ≤0.13, the scale is 1:1000; if the ground resolution is set to ≤0.25, the scale is 1:2000; if the ground resolution is set to ≤0.59, the scale is 1:5000; and if the ground resolution is set to ≤1.11, the scale is 1:10000.

[0065] If the error is greater than the preset value, it is considered that the data does not meet the requirements of the power transmission and transformation project. It is then determined whether the accuracy within the boundary line range meets the preset accuracy. If the accuracy within the boundary line range meets the preset accuracy requirement, the two 100m ranges of the line and the remaining area are decomposed into blocks, principal component analysis is performed, power facilities within the 100m range on both sides of the line and the remaining area are screened, and the positions of the power facilities are re-collected to ensure that the positions of the power facilities meet the accuracy requirements.

[0066] If the accuracy within the boundary area does not meet the requirements, the data is considered unusable, and a new digital elevation model is constructed.

[0067] It should be noted that the resolution accuracy of the fused scale will be lower than that of the optimal scale. However, since the upper limit of the data processing accuracy of the lower-level units is limited, the processing efficiency of the optimal scale is extremely slow compared to that of the lower-level units. Furthermore, some devices do not include the specified parameters for excessively high accuracy, requiring manual processing, which is inefficient and prone to errors. Therefore, using the fused scale can improve efficiency, and the deficiency in accuracy can be compensated for by manual inspection.

[0068] It should also be noted that the ground feature modeling range is 75 meters on both sides of the centerline of the transmission line path for voltage levels of 750kV and above, and 50 meters on both sides of the centerline of the transmission line path for voltage levels of 500kV and below. The resolution of the modeling to reflect the location and size of the crossings should be no less than 0.1 meters. After setting the accuracy requirements, the data retains this accuracy in areas with high accuracy requirements, and the accuracy is reduced in other areas to avoid the lower-level unit equipment not being able to meet the accuracy requirements. All three accuracy levels are set based on this rule.

[0069] Furthermore, the accuracy setting on the map is based on the accuracy standard that local departments can use to perform normal data testing. This avoids the problem that if the accuracy on the map is too high, the data that can be used by higher-level units will be transmitted to local departments, resulting in the data being available but unusable.

[0070] It should be noted that by limiting the design depth on the map and the accuracy on the map, the content and accuracy of the geographic information data produced and handed over at each stage of the digital design of transmission lines can be kept consistent with the design depth requirements, so as to meet the requirements of the line project for geographic information data.

[0071] It should also be noted that setting different voltage levels for ground feature modeling ranges ensures accurate information about surrounding ground features for different voltage levels, which is beneficial to improving the safety of the power system. Some 660kV lines can also be modeled using the 500kV range.

[0072] S3: Convert geographic information data formats for unified delivery.

[0073] Furthermore, converting geographic information data formats includes digital design of transmission lines, collecting and producing thematic data on power grids, spatial data of power grids, and transmission line corridor data, and integrating them with geographic information data. The boundaries of transmission line corridor data are plotted in geographic information data, and the region names are noted. The models of railways, highway grades, forests, rivers, overhead pipelines, underground cables, underground communication lines, underground pipelines, cable tunnels, integrated utility tunnels, and cross-sections of overhead lines within the corridor area should be converted into three-dimensional models. If the geographic data has already undergone principal component analysis, then only the data within the remaining non-boundary area after processing is fused with power grid spatial data.

[0074] Since some beacon data that does not affect the project has been removed from the data, only the remaining principal component data needs to be processed.

[0075] It should be noted that the digital design of transmission lines involves collecting and producing power grid thematic data, power grid spatial data, and transmission line corridor data, which are then integrated with geographic information data. This integration process converts the power grid spatial data into tif, img, asc, shp, and tab formats, and the power grid thematic data and transmission line corridor data into shp and tab data.

[0076] It should also be noted that the power grid-specific data includes zoning data for wind, icing, pollution, earthquakes, galloping, lightning damage, and bird damage.

[0077] The power grid spatial data includes data from various power plants, lines, substations, converter stations, switching stations, and series compensation stations.

[0078] Transmission line corridor data includes important planning areas, environmentally sensitive points, mining areas, crossings, and corridor clearing data within the corridor area.

[0079] Engineering survey data mainly consists of engineering measurement data, but may also include hydrological, meteorological, geological, and geophysical data.

[0080] Example 2

[0081] One embodiment of the present invention provides a method for delivering three-dimensional geographic information data for power transmission and transformation projects. To verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculations and simulation experiments.

[0082] The algorithm was evaluated using MATLAB and CloudSim. Simulations were run in an environment with an Intel processor and 16 GB of RAM. The operating system used was 64-bit Windows 11 Ultimate. The point system was simulated using the MATLAB programming language, connecting records and constructing the data distribution.

[0083] To ensure a fairer comparative experiment, and to guarantee that the accuracy of digital orthophoto data and digital elevation model data remains constant, a 3D map model with various terrain features was constructed to simulate real-world conditions. The simulation results will be judged based on whether the accuracy range meets the preset engineering requirements.

[0084] As shown in Table 1, a comparison of geographic information data delivery effects, our invention exhibits significantly fewer data delivery issues under similar terrain conditions. This is because our invention explicitly limits the resolution and grid spacing range. If the data does not meet these requirements, preprocessing is performed, such as resampling, interpolation, and upsampling / downsampling using CNN and GAN networks, ensuring consistent data design depth. Therefore, units at different levels can receive data uniformly without discrepancies in data research depth. The accuracy of the data map is reviewed to meet the geographic information data requirements of the railway project, preventing errors caused by inaccurate data. A standardized data format is implemented to avoid data errors or garbled characters due to formatting issues in data delivery at different levels, thus improving the accuracy of the engineering data.

[0085] Table 1 Comparison of Geographic Information Data Delivery Results

[0086]

[0087] Example 3

[0088] Reference Figure 2 As an embodiment of the present invention, a three-dimensional geographic information data delivery system for power transmission and transformation projects is provided, comprising: a data processing module, an accuracy verification module, and a format conversion module.

[0089] The data processing module is deployed in power plants at different levels to collect and process data, and to standardize the accuracy of the data on the map.

[0090] The accuracy audit module is used to audit and determine the accuracy of the drawing to ensure that the markings on the data drawing are in the corresponding positions.

[0091] The format conversion module is used to merge power grid information and geographic information, and to perform a unified format conversion on the merged data.

[0092] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0093] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-including system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0094] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0095] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc. It should be noted that 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

[0096] It should be noted that 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for delivering three-dimensional geographic information data for power transmission and transformation projects, characterized in that, include: Collect and preprocess digital orthophoto image data and digital elevation model data; The information verification platform verifies the accuracy of geographic information data. Convert geographic information data formats for unified delivery; The process of acquiring and preprocessing digital orthophoto image data and digital elevation model data includes satellite imagery, aerial imagery, and orthophoto maps to form digital orthophoto image data, and contour lines, elevation discrete points, and raster data to form digital elevation model data. The resolution of the digital orthophoto data must be less than 2.1m and greater than 2.2m, and the grid spacing of the digital elevation model data must be greater than 30m and less than 35m. When the resolution of digital orthophoto data does not meet the requirements, the data delivery direction is determined. When delivering from a high-level central power station to a low-level local power station, digital orthophoto data with a resolution higher than 2.1m is resampled to reduce the resolution, while digital orthophoto data with a resolution lower than 2.2m is interpolated to increase the resolution. When delivering from a low-level local power station to a high-level central power station, digital orthophoto data with a resolution higher than 2.2m is delivered directly, while data with a resolution lower than 2.2m is interpolated to increase the resolution. When the grid spacing of the digital elevation model data does not meet the requirements, the data delivery direction is determined. When the data is delivered from the high-level central power station to the low-level local power station, the grid spacing is corrected by upsampling and downsampling the digital elevation model data through CNN network and GAN network. When the data is delivered from the low-level local power station to the high-level central power station, the terrain information of multiple scales is mixed and calculated, and the average value is used to correct the grid spacing. Data accuracy is verified by setting different resolutions for various geographic types and comparing them with preset values.

2. The method for delivering three-dimensional geographic information data for power transmission and transformation projects as described in claim 1, characterized in that: The accuracy verification of geographic information data includes ensuring that the planar position error of orthophoto maps of flat land and hilly areas is less than 0.6 mm on the map, and the planar position error of orthophoto maps of mountainous and high mountain areas is less than 0.8 mm on the map. After verification, the optimal scale is constructed: if the ground resolution is set to ≤0.10, the scale is 1:1000; if the ground resolution is set to ≤0.20, the scale is 1:2000; if the ground resolution is set to ≤0.50, the scale is 1:5000; if the ground resolution is set to ≤1.00, the scale is 1:10000. If the error is greater than the preset value, it is considered that the data does not meet the requirements of the power transmission and transformation project. Different data sources are obtained through satellite imagery, data captured by drones, and ground lidar scanning. Multi-source data fusion is performed, and data that does not meet the threshold is replaced and filled. After the data fusion is completed, the accuracy is reviewed again. If the data passes the review, the optimal scale is adopted. If the data fusion process has not undergone accuracy verification, the data transmission direction is determined. When data is transmitted from a higher-level unit to a lower-level unit, a fusion scale is constructed. If the ground resolution is set to ≤0.13, the scale is selected as 1:1000; if the ground resolution is set to ≤0.25, the scale is selected as 1:2000; if the ground resolution is set to ≤0.59, the scale is selected as 1:5000; if the ground resolution is set to ≤1.11, the scale is selected as 1:10000. When data is transmitted from a lower-level unit to a higher-level unit, the higher-level unit extracts features based on historical geographic data, and then matches the extracted features with the historical geographic data to obtain geographic information data that meets the accuracy threshold.

3. The method for delivering three-dimensional geographic information data for power transmission and transformation projects as described in claim 2, characterized in that: The accuracy review of geographic information data also includes that the accuracy of the digital elevation model is not lower than the first-level accuracy requirement within the boundary area, not lower than the second-level accuracy requirement within 100m on both sides of the line, and not lower than the third-level accuracy requirement in the remaining area. The first-level accuracy requirements include: ≤0.4m for flat terrain, ≤0.5m for hilly terrain, ≤1.2m for mountainous terrain, and ≤1.5m for high mountain terrain; Level 2 accuracy requirements include: ≤0.5m for flat terrain, ≤0.7m for hilly terrain, ≤1.5m for mountainous terrain, and ≤2m for high mountainous terrain; The accuracy requirements for Level 3 are as follows: ≤0.5m for flat terrain, ≤1.05m for hilly terrain, ≤2.25m for mountainous terrain, and ≤3m for high mountainous terrain; If the error is greater than the preset value, it is considered that the data does not meet the requirements of the power transmission and transformation project. It is then determined whether the accuracy within the boundary line range meets the preset accuracy. If the accuracy within the boundary line range meets the preset accuracy requirement, the two 100m ranges of the line and the remaining area are decomposed into blocks, principal component analysis is performed, power facilities within the 100m range on both sides of the line and the remaining area are screened, and the positions of the power facilities are re-collected to ensure that the positions of the power facilities meet the accuracy requirements. If the accuracy within the boundary area does not meet the requirements, the data is considered unusable, and a new digital elevation model is constructed.

4. The method for delivering three-dimensional geographic information data for power transmission and transformation projects as described in claim 3, characterized in that: The accuracy verification of geographic information data also includes a 75-meter radius on both sides of the centerline of the transmission line path for voltage levels of 750kV and above, and a 50-meter radius on both sides of the centerline of the transmission line path for voltage levels of 500kV and below, to construct a resolution of not less than 0.1 meters that reflects the location and size of the crossing objects.

5. The method for delivering three-dimensional geographic information data for power transmission and transformation projects as described in claim 4, characterized in that: The conversion of geographic information data format includes digital design of transmission lines, collection and production of power grid thematic data, power grid spatial data, and transmission line corridor data, and fusion with geographic information data. The transmission line corridor data is used to plot boundaries and indicate area names in the geographic information data. The models of railways, highway grades, forests, rivers, overhead pipelines, underground cables, underground communication lines, underground pipelines, cable tunnels, integrated utility tunnels, and overhead line crossings within the corridor area should be converted into three-dimensional models. If the geographic data has already undergone principal component analysis, then only the data within the remaining non-boundary area after processing is fused with power grid spatial data.

6. The method for delivering three-dimensional geographic information data for power transmission and transformation projects as described in claim 5, characterized in that: The conversion of geographic information data formats also includes digital design of transmission lines, collecting and producing power grid thematic data, power grid spatial data, and transmission line corridor data, and integrating them with geographic information data to complete the integration. The power grid spatial data is converted into tif, img, asc, shp, and tab formats, and the power grid thematic data and transmission line corridor data are converted into shp and tab data.

7. A system employing the three-dimensional geographic information data delivery method for power transmission and transformation projects as described in any one of claims 1 to 6, characterized in that: This includes a data processing module, a precision verification module, and a format conversion module; The data processing module is deployed in power plants at different levels to collect and process data, and to standardize the accuracy of the data on the map. The accuracy review module is used to review and determine the accuracy of the drawing to ensure that the markings on the data drawing are in the corresponding positions; The format conversion module is used to integrate power grid information and geographic information, and to perform a unified format conversion on the integrated data.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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