Geological surveying and mapping system and method for hydraulic engineering

Abstract

The invention relates to the technical field of geological surveying and mapping, in particular to a geological surveying and mapping system and method for hydraulic engineering. Comprising a historical surveying and mapping data extraction unit, a related area setting unit, a surveying and mapping path planning unit, an effective area setting unit and a surveying and mapping re-planning unit. The historical surveying and mapping data extraction unit is used for acquiring a surveying and mapping area required by a water conservancy project plan and extracting historical surveying and mapping data related to the area required to be surveyed and mapped; a surveying and mapping area is divided into a normal area and a related area, and historical surveying and mapping data is used for representing the related area, so that when a real-time surveying and mapping area is the same as the historical surveying and mapping data and reaches an effective threshold value in the surveying and mapping process, the historical surveying and mapping data is directly substituted into the related area, and the flight path of an unmanned aerial vehicle is updated; therefore, the time for the unmanned aerial vehicle to complete surveying and mapping of the surveying and mapping area is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of geological surveying and mapping, and more specifically, to a geological surveying and mapping system and method for water conservancy projects. Background Art

[0002] Water conservancy projects are engineering constructions that artificially utilize water resources and change natural hydrogeological conditions to achieve purposes such as regulating water resource supply and flood control and drainage. They mainly include various types such as reservoirs, sluices, canals, irrigation systems, pumping stations, and flood control projects.

[0003] Existing geological surveying and mapping operations for water conservancy projects are usually carried out in two typical scenarios: one is to conduct full-range initial surveying for a completely new area without historical surveying data; the other is to conduct supplementary surveying or updated surveying for an area with existing surveying results. In the surveying scenario of a completely new area, existing technologies need to evenly distribute points and conduct full-coverage collection for the entire target area, resulting in long operation time and high energy consumption of equipment such as unmanned aerial vehicles (UAVs). Especially in large mountainous or water area scenarios, the field operation cost increases significantly. In the updated surveying scenario of an old area, traditional methods lack effective reuse of historical surveying data. Even if the geological conditions in some areas have not changed significantly, data still needs to be repeatedly collected, causing waste of resources. Therefore, a geological surveying and mapping system and method for water conservancy projects are proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a geological surveying and mapping system and method for water conservancy projects to solve the problems raised in the above background art.

[0005] To achieve the solution of the above technical problems, one of the purposes of the present invention is to provide a geological surveying and mapping system for water conservancy projects, including a historical surveying data extraction unit, a relevant area setting unit, a surveying path planning unit, an area validity setting unit, and a surveying re-planning unit;

[0006] The historical surveying data extraction unit is used to obtain the surveying area required for the water conservancy project plan and simultaneously extract the historical surveying data related to the required surveying area;

[0007] The relevant area setting unit is used to divide relevant areas by combining historical surveying data with the surveying area and screen the historical surveying data of the same relevant area according to the surveying time period;

[0008] The surveying path planning unit is used to conduct normal area analysis by combining the surveying area with the relevant area, then plan surveying points by combining the normal area and the relevant area with the surveying range of the UAV, and simultaneously collect real-time surveying data of the UAV;

[0009] The area validity setting unit is used to set the validity threshold for relevant areas according to the mapping time period and occupied area of each relevant area, and combine the occupied area and corresponding historical mapping data according to the mapping time period for relevant areas;

[0010] The mapping re - planning unit is used to analyze relevant mapping data based on the real - time mapping data according to the relevant area range, and at the same time, compare the relevant mapping data with the corresponding historical mapping data effectively, calculate the proportion value of the relevant mapping data according to the comparison result. When the proportion value is greater than the validity threshold, the relevant area is determined to have been mapped and sent to the mapping path planning unit for re - planning of mapping points.

[0011] As a further improvement of this technical solution, the historical mapping data extraction unit extracts the water conservancy project plan and obtains the required mapping areas in the water conservancy project plan;

[0012] At the same time, extract the geographical locations of the mapping areas and conduct range division.

[0013] As a further improvement of this technical solution, the historical mapping data extraction unit searches for mapping records through geographical locations, and then uses the searched mapping records as the historical mapping data related to the current mapping area;

[0014] When the mapping data contained in the mapping record exceeds the current mapping area, split the mapping record and only save the historical mapping data related to the current mapping area.

[0015] As a further improvement of this technical solution, the relevant area setting unit includes an area division module and a mapping screening module;

[0016] The area division module is used to divide relevant areas by combining historical mapping data with mapping areas, assign each historical mapping data to the mapping area according to the corresponding geographical location, and at the same time, each historical mapping data corresponds to a relevant area;

[0017] The mapping screening module is used to conduct overlap analysis on each relevant area, obtain the overlapping areas between each relevant area, extract the mapping time periods of the historical mapping data corresponding to the overlapping areas, obtain the mapping time periods of each historical mapping data, and then select the historical mapping data closest to the real - time time according to the mapping time period as the attribution of the overlapping area;

[0018] So that there is no geographical location conflict between each relevant area, and each relevant area only corresponds to one historical mapping data.

[0019] As a further improvement of this technical solution, the mapping path planning unit includes an area analysis module and a mapping planning module;

[0020] The area analysis module is used to screen the survey area in combination with the relevant area, and regard the area part in the survey area that does not belong to the relevant area as the normal area;

[0021] The survey planning module is used to obtain the survey scope in the working state of the UAV, and plan the survey points by combining the normal area and the relevant area with the survey scope of the UAV, so as to form the flight survey route of the UAV;

[0022] At the same time, when the UAV flies to the survey point, the UAV starts to work to collect real-time survey data of the survey area, and collects the collected real-time survey data.

[0023] As a further improvement of this technical solution, the area effective setting unit includes an area extraction module and a threshold setting module;

[0024] The area extraction module is used to determine the survey time period of each relevant area, calculate the occupied area of the relevant area in the survey area, and perform geological analysis based on the historical survey data corresponding to the relevant area to obtain the geological characteristics of the relevant area;

[0025] The threshold setting module is used to set the effective threshold for the relevant area according to the survey time period in combination with the occupied area and the geological characteristics.

[0026] As a further improvement of this technical solution, when the threshold setting module performs effective threshold setting, the setting rules are as follows:

[0027] The farther the survey time period is from the real time, the higher the impact on the effective threshold;

[0028] The closer the survey time period is to the real time, the shorter the impact on the effective threshold;

[0029] The larger the occupied area, the higher the impact on the effective threshold;

[0030] The smaller the occupied area, the lower the impact on the effective threshold;

[0031] Set the corresponding effective threshold impact for each geological feature.

[0032] As a further improvement of this technical solution, the survey re-planning unit includes an effective analysis module and a survey management module;

[0033] The effective analysis module is used to locate the real-time survey data according to the geographical location, and perform interactive analysis by combining the located geographical location with the geographical location of the relevant area, and regard the interactive part of the real-time survey data and the geographical location of the relevant area as the relevant survey data;

[0034] Then, the relevant surveying and mapping data is effectively compared with the historical surveying and mapping data corresponding to the relevant area. When the surveying and mapping data of the corresponding geographical location part of the relevant surveying and mapping data and the historical surveying and mapping data are the same, the proportion value of the relevant area is increased according to the area of the relevant surveying and mapping data. Conversely, when the surveying and mapping data of the corresponding geographical location part of the relevant surveying and mapping data and the historical surveying and mapping data are different, the proportion value of the relevant area is decreased according to the area of the relevant surveying and mapping data;

[0035] The surveying and mapping management module is used to compare the proportion value corresponding to each relevant area with the corresponding effective threshold. When the proportion value is greater than the effective threshold, the relevant area is determined to have been surveyed, and the historical surveying and mapping data of the relevant area is substituted into the surveyed area in this plan and sent to the surveying and mapping path planning unit for re-planning of surveying points. Conversely, when the proportion value is less than the effective threshold, it remains unchanged.

[0036] As a further improvement of this technical solution, when the surveying and mapping management module substitutes the historical surveying and mapping data, it substitutes the historical surveying and mapping data of the area not surveyed by the drone. At the same time, the priority of the real-time surveying and mapping data is higher than that of the historical surveying and mapping data. When the relevant area is involved in the subsequent surveying process, the substituted historical surveying and mapping data is updated according to the real-time surveying and mapping data.

[0037] The second object of the present invention is to provide a geological surveying and mapping method for water conservancy projects, including the geological surveying and mapping system for water conservancy projects described in any one of the above, and including the following steps:

[0038] S1. Combine the historical surveying and mapping data with the surveyed area to divide the relevant areas, and screen the historical surveying and mapping data of the same relevant area according to the surveying time period;

[0039] S2. Combine the surveyed area with the relevant areas for normal area analysis, then combine the normal areas and the relevant areas with the surveying range of the drone to plan surveying points, and collect the real-time surveying and mapping data of the drone at the same time;

[0040] S3. According to the surveying time period and occupied area extracted from each relevant area, set the effective threshold for the relevant area according to the surveying time period, the occupied area, and the corresponding historical surveying and mapping data. Analyze the relevant surveying and mapping data of the real-time surveying and mapping data according to the relevant area range. At the same time, effectively compare the relevant surveying and mapping data with the corresponding historical surveying and mapping data, calculate the proportion value of the relevant surveying and mapping data according to the comparison result, and plan the surveying points according to the comparison result.

[0041] Compared with the prior art, the beneficial effects of the present invention:

[0042] 1. A geological mapping system and method for water conservancy projects. By dividing the mapping area into a normal area and a relevant area, and using historical mapping data to represent the relevant area, when the real-time mapping area is the same as the historical mapping data during the mapping process and reaches an effective threshold, the historical mapping data is directly substituted into the relevant area to update the flight path of the unmanned aerial vehicle (UAV), thereby reducing the time required for the UAV to complete the mapping of the mapping area. At the same time, setting different effective thresholds for different relevant areas ensures the effectiveness of substituting the historical mapping data.

[0043] 2. A geological mapping system and method for water conservancy projects. By automatically screening the historical data of the overlapping area according to the mapping time period, retaining the data closest to the real-time time, ensuring the use of the latest geological information, avoiding misjudgment caused by using outdated data, and improving the timeliness of geological analysis. For example, in areas with high timeliness requirements such as fault zones, the latest data can be directly used to reduce the data verification cost.

[0044] 3. A geological mapping system and method for water conservancy projects. By automatically collecting data by the UAV according to the preset flight path, the edge computing node real-time solves the coordinates and compares them with the historical data. When the proportion value exceeds the threshold, the already mapped area is automatically excluded and a new flight path is generated without manual intervention, shortening the data processing cycle and improving the emergency response ability. For example, during the flood season, the mapping and analysis of the river channel scouring area can be quickly completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is the overall structure schematic diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] As Figure 1 shown, one of the purposes of the present invention is to provide a geological mapping system for water conservancy projects, including a historical mapping data extraction unit, a relevant area setting unit, a mapping path planning unit, a regional effectiveness setting unit, and a mapping re-planning unit;

[0048] The historical mapping data extraction unit is used to obtain the mapping area required by the water conservancy project plan, and at the same time extract the historical mapping data related to the required mapping area;

[0049] The historical surveying and mapping data extraction unit obtains the required surveying and mapping area in the water conservancy project plan by extracting the water conservancy project plan;

[0050] The text description in the water conservancy project plan document or the drawing is parsed through natural language processing (NLP) to extract the regional description in the document from the drawing, extract the vector boundaries (such as polygons, line segments), or locate the area through coordinate points (such as longitude and latitude, plane coordinates).

[0051] At the same time, the geographical location of the surveying area is extracted and the scope is divided.

[0052] The historical surveying and mapping data extraction unit searches for surveying and mapping records based on the geographical location, and then uses the surveying and mapping records obtained through the search as the historical surveying and mapping data related to the current surveying and mapping area;

[0053] When the surveying and mapping data contained in the surveying and mapping record exceeds the current surveying and mapping area, the surveying and mapping record is split and only the historical surveying and mapping data related to the current surveying and mapping area is saved.

[0054] For each historical surveying and mapping record searched, determine whether its geographical scope overlaps with the current surveying and mapping area, retain only the part of the historical data that overlaps with the surveying and mapping area, and discard the data outside the area.

[0055] The relevant area setting unit is used to divide the historical surveying and mapping data into relevant areas in combination with the surveying and mapping areas, and to filter the historical surveying and mapping data of the same relevant areas according to the surveying and mapping period;

[0056] The relevant area setting unit includes an area division module and a surveying and mapping screening module;

[0057] The regional division module is used to divide the historical surveying and mapping data into relevant areas in combination with the surveying and mapping areas, and to attribute each historical surveying and mapping data to the surveying and mapping area according to the corresponding geographical location. At the same time, each historical surveying and mapping data corresponds to a relevant area;

[0058] The surveying and mapping screening module is used to perform overlapping analysis on each relevant area, obtain the overlapping area between each relevant area, extract the surveying and mapping period of the historical surveying and mapping data corresponding to the overlapping area, obtain the surveying and mapping period of each historical surveying and mapping data, and then select the historical surveying and mapping data closest to the real time as the belonging of the overlapping area according to the surveying and mapping period;

[0059] This ensures that there is no geographical conflict between each relevant area, and each relevant area only corresponds to one historical surveying and mapping data.

[0060] The mapping path planning unit is used to analyze the normal area by combining the mapping area with the related area, and then plan the mapping points by combining the normal area and the related area with the mapping range of the UAV, while collecting the real-time mapping data of the UAV;

[0061] The mapping path planning unit includes a region analysis module and a mapping planning module;

[0062] The region analysis module is used to screen the mapping region in combination with relevant regions, and regard the region part in the mapping region that does not belong to the relevant regions as the normal region;

[0063] Calculate the part of the mapping region not covered by the relevant regions, define it as the normal region, and extract the normal region through spatial difference set operation;

[0064] The mapping planning module is used to obtain the mapping range in the working state of the UAV, and plan mapping points by combining the normal region and the relevant regions with the mapping range of the UAV, so as to form the flight mapping route of the UAV;

[0065] Divide the planning region (the region not covered by historical data and the relevant regions to be verified) into grids with the same side length, and the center of each grid is a potential mapping point. If the grid intersects with the uncovered region, set a mapping point at the center of the grid, and merge adjacent overlapping mapping points to ensure the maximum coverage of each point.

[0066] Regard the mapping points as nodes in graph theory, and use the shortest path algorithm to generate a closed flight path.

[0067] Determine the mapping range according to the flight altitude of the UAV, the camera field of view angle and the ground resolution affected;

[0068] The effective mapping range is a circular region centered on the current position of the UAV with a radius (determined by the mapping range affected by the flight altitude, the camera field of view angle, and the ground resolution);

[0069] At the same time, when the UAV flies to the mapping point, the UAV starts to work to collect real-time mapping data of the mapping region, and collect the collected real-time mapping data.

[0070] When the UAV reaches the mapping point coordinates, start the sensor to collect data, and the data includes geographical tags and timestamps.

[0071] The region effective setting unit is used to set the effective threshold for the relevant regions according to the mapping time period and occupied area of each relevant region, and combine the occupied area and the corresponding historical mapping data according to the mapping time period;

[0072] The region effective setting unit includes a region extraction module and a threshold setting module;

[0073] The area extraction module is used to determine the survey period of each relevant area, calculate the occupied area of the relevant area in the surveyed area, and conduct geological analysis based on the historical survey data corresponding to the relevant area to obtain the geological characteristics of the relevant area (analyze the geological characteristics of the area, such as rock type, soil, stratigraphic structure, etc., classify and code each geological characteristic according to the historical survey data corresponding to the relevant area);

[0074] The threshold setting module is used to set the effective threshold for the relevant area according to the survey period, combined with the occupied area and geological characteristics;

[0075] When setting the effective threshold, the threshold setting module has the following setting rules:

[0076] The farther the survey period is from the real-time time, the higher the impact on the effective threshold;

[0077] The closer the survey period is to the real-time time, the shorter the impact on the effective threshold;

[0078] The larger the occupied area, the higher the impact on the effective threshold;

[0079] The smaller the occupied area, the lower the impact on the effective threshold;

[0080] Set the corresponding effective threshold impact for each geological feature, and the formula is as follows:

[0081] ΔT i =|T0 - T i |;

[0082] Where, ΔT i is the survey period distance of the i-th relevant area, T0 is the real-time time, and T i is the survey period of the i-th relevant area;

[0083] E i =w1·f(ΔT i ) + w2·A i + w3·p(Q i );

[0084] Where, E i is the effective threshold, w1 is the weight coefficient of the survey period distance, f(ΔT i ) is a function of the survey period distance, satisfying the relationship that the farther the distance, the larger the function value, w2 is the weight coefficient of the occupied area ratio, A i is the occupied area ratio, w3 is the weight coefficient of the geological characteristics, and p(Q i ) is a function of the geological characteristics, and different values are assigned according to different geological characteristics.

[0085] Loose sediments represent high timeliness requirements and are set to 0.6;

[0086] Bedrock (without fractures) represents low timeliness requirements and is set to 0.3;

[0087] Fault zones represent extremely high timeliness requirements and are set to 0.8;

[0088] The surveying and mapping re - planning unit is used to analyze relevant surveying and mapping data of real - time surveying and mapping data according to the relevant regional scope, and at the same time, effectively compare the relevant surveying and mapping data with the corresponding historical surveying and mapping data, calculate the proportion value of the relevant surveying and mapping data according to the comparison result. When the proportion value is greater than the effective threshold, the relevant area is determined to have been surveyed and sent to the surveying and mapping path planning unit for re - planning of surveying points.

[0089] The surveying and mapping re - planning unit includes an effective analysis module and a surveying and mapping management module;

[0090] The effective analysis module is used to locate real - time surveying and mapping data according to the geographical location, and at the same time, conduct interactive analysis based on the located geographical location and the geographical location of the relevant area, and take the interactive part of the real - time surveying and mapping data and the geographical location of the relevant area as the relevant surveying and mapping data;

[0091] Centimeter - level positioning data is obtained through the RTK (Real - Time Kinematic) module carried by the UAV, or the absolute coordinates are solved through the PPP (Precise Point Positioning) technology. For image data, it is converted into geographical coordinates through the collinearity equation using POS (Position and Orientation System) parameters (longitude, latitude, heading angle, etc.);

[0092] Judge whether there is a spatial intersection between the geographical range of the real - time data and each relevant area. For the areas with intersections, they are used as relevant surveying and mapping data;

[0093] Then, the relevant surveying and mapping data is effectively compared with the corresponding historical surveying and mapping data of the relevant area. When the surveying and mapping data of the corresponding geographical location parts of the relevant surveying and mapping data and the historical surveying and mapping data are the same (a same threshold can be set, for example, 95%, and when the similarity reaches 95%, it is judged as the same), the proportion value of the relevant area is increased according to the area of the relevant surveying and mapping data. On the contrary, when the surveying and mapping data of the corresponding geographical location parts of the relevant surveying and mapping data and the historical surveying and mapping data are different, the proportion value of the relevant area is decreased according to the area of the relevant surveying and mapping data;

[0094] The relevant surveying and mapping data and the corresponding historical surveying and mapping data of the relevant area are compared point - by - point or area - by - area according to the geographical location;

[0095] Judge whether the surveying and mapping data is the same according to the comparison result;

[0096] If they are the same, the proportion value of the relevant area is increased according to the area of the relevant surveying and mapping data;

[0097] If different, according to the area of the relevant surveying and mapping data, the reduction ratio value for the relevant area is determined.

[0098] The surveying and mapping management module is used to compare the ratio value corresponding to each relevant area with the corresponding effective threshold. When the ratio value is greater than the effective threshold, the relevant area is determined to have been surveyed, and the historical surveying and mapping data of the relevant area is substituted into the surveyed area in this plan and sent to the surveying path planning unit for re-planning of surveying points. Conversely, when the ratio value is less than the effective threshold, it remains unchanged.

[0099] When the surveying and mapping management module substitutes historical surveying and mapping data, it substitutes the historical surveying and mapping data of the area not surveyed by the unmanned aerial vehicle. At the same time, the priority of real-time surveying and mapping data is greater than that of historical surveying and mapping data. When the relevant area is involved in the subsequent surveying process, the substituted historical surveying and mapping data is updated according to the real-time surveying and mapping data.

[0100] The second object of the present invention is to provide a geological surveying and mapping method for water conservancy projects, including the geological surveying and mapping system for water conservancy projects in any one of the above, and the method includes the following steps:

[0101] S1. Divide relevant areas by combining historical surveying and mapping data with the surveyed area, and screen the historical surveying and mapping data of the same relevant area according to the surveying time period.

[0102] S2. Analyze the normal area by combining the surveyed area with the relevant area, then plan surveying points by combining the normal area and the relevant area with the surveying range of the unmanned aerial vehicle, and collect the real-time surveying and mapping data of the unmanned aerial vehicle at the same time.

[0103] S3. Extract the surveying time period and occupied area of each relevant area, set the effective threshold for the relevant area according to the surveying time period, the occupied area and the corresponding historical surveying and mapping data, analyze the relevant surveying and mapping data according to the relevant area range of the real-time surveying and mapping data, and at the same time make an effective comparison between the relevant surveying and mapping data and the corresponding historical surveying and mapping data, calculate the ratio value of the relevant surveying and mapping data according to the comparison result, and plan surveying points according to the comparison result.

[0104] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A geological mapping system for water conservancy projects, characterized in that: It includes a historical surveying and mapping data extraction unit, a relevant area setting unit, a surveying and mapping path planning unit, an area validity setting unit, and a surveying and mapping re-planning unit; The historical surveying and mapping data extraction unit is used to obtain the surveying and mapping area required by the water conservancy project plan, and at the same time extract the historical surveying and mapping data related to the area to be surveyed; The relevant area setting unit is used to divide relevant areas by combining historical surveying and mapping data with the surveying and mapping area, and screen the historical surveying and mapping data of the same relevant area according to the surveying time period; The surveying and mapping path planning unit is used to conduct normal area analysis by combining the surveying and mapping area with relevant areas, then plan surveying points by combining the normal area and relevant areas with the surveying range of the unmanned aerial vehicle, and collect the real-time surveying and mapping data of the unmanned aerial vehicle; The area validity setting unit is used to set the effective threshold for relevant areas according to the surveying time period and occupied area extracted from each relevant area, in combination with the occupied area and corresponding historical surveying and mapping data according to the surveying time period; The surveying and mapping re-planning unit is used to analyze relevant surveying and mapping data according to the relevant area range for real-time surveying and mapping data, and at the same time conduct an effective comparison of the relevant surveying and mapping data with the corresponding historical surveying and mapping data, calculate the proportion value of the relevant surveying and mapping data according to the comparison result. When the proportion value is greater than the effective threshold, the relevant area is determined to have been surveyed and sent to the surveying and mapping path planning unit for re-planning of surveying points.

2. The geological mapping system for water conservancy projects according to claim 1, characterized in that: The historical surveying and mapping data extraction unit obtains the required surveying and mapping area from the water conservancy project plan by extracting the water conservancy project plan; At the same time, it extracts the geographical location of the surveying and mapping area and conducts range division.

3. The geological mapping system for water conservancy projects according to claim 1, characterized in that: The historical surveying and mapping data extraction unit searches for surveying records through geographical location, and then uses the obtained surveying records as the historical surveying and mapping data related to the current surveying and mapping area; When the surveying data included in the surveying record exceeds the current surveying and mapping area, the surveying record is segmented, and only the historical surveying and mapping data related to the current surveying and mapping area is saved.

4. The geological mapping system for water conservancy projects according to claim 1, wherein: The relevant area setting unit includes an area division module and a surveying and mapping screening module; The area division module is used to divide relevant areas by combining historical surveying and mapping data with the surveying and mapping area, assign each historical surveying and mapping data to the surveying and mapping area according to the corresponding geographical location, and at the same time each historical surveying and mapping data corresponds to a relevant area; The surveying and mapping screening module is used to conduct overlapping analysis on each relevant area, obtain the overlapping area between each relevant area, extract the surveying time period of the historical surveying and mapping data corresponding to the overlapping area, obtain the surveying time period of each historical surveying and mapping data, and then select the historical surveying and mapping data closest to the real-time time according to the surveying time period as the attribution of the overlapping area; So that there is no geographical location conflict between each relevant area, and each relevant area corresponds to only one historical surveying and mapping data.

5. The geological mapping system for water conservancy projects according to claim 1, characterized in that: The surveying and mapping path planning unit includes an area analysis module and a surveying and mapping planning module; The area analysis module is used to screen the surveying and mapping area in combination with relevant areas, and regard the area part in the surveying and mapping area that does not belong to the relevant area as the normal area; The mapping and planning module is used to obtain the mapping range of the UAV in the working state, and plan the mapping points by combining the normal area and the relevant area with the mapping range of the UAV, so as to form the flight mapping route of the UAV; At the same time, when the UAV flies to the mapping point, the UAV starts to work to collect real-time mapping data of the mapping area, and collects the collected real-time mapping data.

6. The geological mapping system for water conservancy projects according to claim 1, characterized in that: The area effective setting unit includes an area extraction module and a threshold setting module; The area extraction module is used to determine the mapping time period of each relevant area, calculate the occupied area of the relevant area in the mapping area, and perform geological analysis according to the historical mapping data corresponding to the relevant area to obtain the geological characteristics of the relevant area; The threshold setting module is used to set the effective threshold for the relevant area according to the mapping time period, combined with the occupied area and the geological characteristics.

7. The geological mapping system for water conservancy projects according to claim 6, characterized in that: When the threshold setting module performs effective threshold setting, the setting rules are as follows: The farther the mapping time period is from the real time, the higher the impact on the effective threshold; The closer the mapping time period is to the real time, the shorter the impact on the effective threshold; The larger the occupied area, the higher the impact on the effective threshold; The smaller the occupied area, the lower the impact on the effective threshold; Set the corresponding effective threshold impact for each geological feature.

8. The geological mapping system for water conservancy projects according to claim 1, characterized in that: The mapping re-planning unit includes an effective analysis module and a mapping management module; The effective analysis module is used to locate the real-time mapping data according to the geographical location, and perform interactive analysis by combining the located geographical location with the geographical location of the relevant area, and use the interactive part of the real-time mapping data and the geographical location of the relevant area as the relevant mapping data; Then, the relevant mapping data is effectively compared with the historical mapping data corresponding to the relevant area. When the mapping data of the corresponding geographical location part of the relevant mapping data and the historical mapping data is the same, the proportion value of the relevant area is increased according to the area of the relevant mapping data. Otherwise, when the mapping data of the corresponding geographical location part of the relevant mapping data and the historical mapping data is different, the proportion value of the relevant area is decreased according to the area of the relevant mapping data; The mapping management module is used to compare the proportion value corresponding to each relevant area with the corresponding effective threshold. When the proportion value is greater than the effective threshold, the relevant area is determined to have been mapped, and the historical mapping data of the relevant area is substituted into the mapping area in this plan and sent to the mapping path planning unit for re-planning of the mapping points. Otherwise, when the proportion value is less than the effective threshold, it remains unchanged.

9. The geological mapping system for water conservancy projects according to claim 8, characterized in that: When the mapping management module substitutes the historical mapping data, it substitutes the historical mapping data of the area that the UAV has not mapped. At the same time, the priority of the real-time mapping data is higher than that of the historical mapping data. When the relevant area is involved in the subsequent mapping process, the substituted historical mapping data is updated according to the real-time mapping data.

10. A geological mapping method for implementing a geological mapping system for water conservancy projects, comprising the geological mapping system for water conservancy projects according to any one of claims 1-9, characterized in that: It includes the following steps: S1. Divide the relevant areas by combining the historical mapping data with the mapping area, and screen the historical mapping data of the same relevant area according to the mapping time period; S2. Combine the surveyed area with relevant areas for normal area analysis, then combine the normal areas and relevant areas with the survey range of the drone for survey point planning, and at the same time collect the real-time survey data of the drone; S3. Extract the survey time period and occupied area of each relevant area. Set an effective threshold for the relevant area according to the survey time period, combined with the occupied area and the corresponding historical survey data. Analyze the relevant survey data according to the range of the relevant area for the real-time survey data. At the same time, conduct an effective comparison of the relevant survey data combined with the corresponding historical survey data. Calculate the proportion value of the relevant survey data according to the comparison result, and conduct survey point planning according to the comparison result.

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