A boundary demarcation and marking method based on a real-scene 3D model

Abstract

This invention provides a boundary demarcation and marking method based on a real-scene 3D model, comprising the following steps: creating a working base map of the real-scene 3D model; performing internal verification based on the working base map, including: verifying conflicts between boundaries and land category boundaries, boundaries and spatial control boundaries, and boundaries and ownership boundaries; conducting on-site boundary demarcation based on the working base map, including: using positioning measurement methods to locate boundary inflection points on-site based on the working base map, and performing on-site verification and adjustment of the located boundary inflection points; and selecting and pre-marking boundary markers and signs based on the working base map, including: visualizing boundary markers and signs based on the working base map, and conducting analysis and simulation of boundary marker and sign selection based on the working base map. This invention can solve the technical problem that the efficiency of traditional boundary demarcation and marking is limited by traditional basic scale topographic maps and their digital products.

Description

Technical Field

[0001] This invention relates to the field of boundary demarcation and marking technology, and specifically to a boundary demarcation and marking method based on a real-world 3D model. Background Technology

[0002] Boundary demarcation and marking refers to the work of verifying boundary lines in the office, conducting on-site boundary surveys, and setting up boundary markers and signs at important locations. Currently, boundary demarcation and marking often uses traditional basic-scale topographic maps and their digital products as the working base map, and demarcation and marking are carried out on the working base map.

[0003] However, existing base maps, due to their fixed scale and abstract symbolic elements, limit the efficiency of office verification, on-site boundary surveying, and the selection of boundary markers and signs. In recent years, realistic 3D modeling technology has developed rapidly due to its advantages of stepless scaling, ease of interpretation, and high customization. However, current technologies do not include methods for using realistic 3D modeling technology for boundary surveying and marker placement. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a boundary demarcation and marking method based on a real-world 3D model, in order to solve the technical problem that the efficiency of boundary demarcation and marking work is limited by traditional basic scale topographic maps and their digital products.

[0005] The technical solution adopted in this invention is a boundary demarcation and marking method based on a real-scene 3D model, comprising the following steps:

[0006] Creating a working base map for a realistic 3D model;

[0007] The internal verification based on the working base map includes: verifying the contradictions between boundaries and land category boundaries, the contradictions between boundaries and spatial control boundaries, and the contradictions between boundaries and ownership boundaries.

[0008] On-site boundary demarcation is assisted by working base maps, including: using positioning measurement methods to locate boundary inflection points on-site based on working base maps, and on-site verification and adjustment of boundary inflection points that have been located on-site;

[0009] The selection and pre-marking of boundary markers and signs are carried out based on the working base map, including: visualization of boundary markers and signs based on the working base map, and analysis and simulation of the selection of boundary markers and signs based on the working base map.

[0010] Furthermore, the working base map of the real-scene 3D model includes basic data and analysis data;

[0011] The basic data includes a real-world 3D model and defined boundaries. The real-world 3D model includes a city-level oblique photogrammetry 3D model and a terrain-level 3D model. The defined boundaries include surface vectors and line vectors.

[0012] The data analyzed includes land category boundaries, spatial control boundaries, and ownership boundaries.

[0013] Furthermore, a check is conducted to verify the consistency of boundaries and land use classifications, including:

[0014] By interpreting the plane, elevation coordinates, and texture of ground features, boundary vertex points can be added, deleted, and modified.

[0015] By selecting and tracking different land use boundaries, the boundary lines can be corrected.

[0016] Furthermore, a verification of contradictions in boundaries and spatial control limits will be conducted, including:

[0017] For areas within the boundary that involve permanent basic farmland or urban development boundaries, these areas are marked and extracted as the first conflicting spatial control boundary patches. Combined with the land use boundaries in the base map, the extracted first conflicting spatial control boundary patches are processed as follows: If the total area enclosed by the boundaries of cultivated land, orchards, commercial and service land, industrial and mining storage land, residential land, public management and public service land, special land, and transportation land in the first conflicting spatial control boundary patch exceeds the area threshold, then the first conflicting spatial control boundary patch is removed or avoided by correcting the boundary; otherwise, no boundary correction is needed.

[0018] For drinking water source protection areas and nature reserves outside the boundary, they are marked and extracted as the second conflicting plots of the spatial control boundary. Combined with the land category boundaries in the working base map, the extracted second conflicting plots of the spatial control boundary are processed as follows: If the total area enclosed by the land category boundaries such as forest land, grassland, water area, and wetland in the second conflicting plot of the spatial control boundary exceeds the area threshold of the second conflicting plot of the spatial control boundary, then the boundary boundary is corrected and the plot is transferred or incorporated into the second conflicting plot of the spatial control boundary; otherwise, the boundary boundary does not need to be corrected.

[0019] Furthermore, a verification of conflicts regarding boundaries and ownership limits will be conducted, including:

[0020] For those involving real estate or natural resource ownership within the boundary, they are marked and extracted as ownership boundary conflict patches. Combined with the ownership boundaries in the working base map, the extracted ownership boundary conflict patches are processed as follows: If the total area enclosed by the real estate ownership or natural resource ownership boundaries in the ownership boundary conflict patch exceeds the area threshold, then the ownership boundary conflict patch is removed or avoided by correcting the boundary boundary; otherwise, there is no need to correct the boundary boundary.

[0021] Furthermore, the boundary inflection points that have been located on-site are checked and adjusted on-site, including: adding, deleting and modifying boundary inflection points according to the adjustment method based on the working base map and typical features or orientation features on the ground to complete the correction operation, and then plotting the corrected boundary inflection points on the working base map.

[0022] Furthermore, the visualization of boundary markers and signs is based on the working base map, including: storing boundary markers and signs as point elements and uniformly symbolizing them; and plotting the boundary markers and signs on the working base map.

[0023] Furthermore, based on the working base map, analysis and simulation of the site selection of boundary markers and signs are carried out, including: analyzing the potential key areas and important turning points of the boundary boundary where boundary markers and signs are to be pre-buried, and simulating and displaying them on the working base map.

[0024] Furthermore, key areas refer to the locations where the boundary lines intersect with the land use boundaries; important turning points refer to the four turning points corresponding to the maximum and minimum values ​​of the north coordinates and the maximum and minimum values ​​of the east coordinates.

[0025] Furthermore, boundary markers and signs are simulated during the internal verification or on-site boundary survey process.

[0026] As can be seen from the above technical solution, the beneficial technical effects of the present invention are as follows:

[0027] This allows boundary demarcation and marking to no longer be constrained by traditional basic scale topographic maps and their digital products, greatly improving work efficiency. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0029] Figure 1 This is a flowchart of the boundary demarcation and marking method based on a real-scene 3D model according to an embodiment of the present invention;

[0030] Figure 2This is a schematic diagram illustrating the analysis and simulation of boundary marker and signage site selection based on a real-world 3D model, according to an embodiment of the present invention. Detailed Implementation

[0031] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0032] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0033] Example

[0034] This embodiment provides a boundary demarcation and marker method based on a real-scene 3D model, such as... Figure 1 As shown, it includes the following steps:

[0035] S1. Create the base map for the realistic 3D model.

[0036] In a specific implementation, the working base map of the real-scene 3D model consists of two parts: basic data and analysis data.

[0037] The basic data includes a realistic 3D model and defined boundaries. The realistic 3D model is divided into city-level oblique photogrammetry 3D models and terrain-level 3D models based on the topography and human activity distribution characteristics of the boundaries. The modeling method for the realistic 3D model can be implemented using any feasible existing technology. The defined boundaries include two element types: surface vector and line vector.

[0038] The data analyzed includes land category boundaries, spatial control boundaries, and ownership boundaries.

[0039] In this embodiment, land use boundaries are expressed as elements through national land survey data or geographic national condition monitoring data, including cultivated land, orchards, forest land, grassland, commercial and service land, industrial and mining storage land, residential land, public management and public service land, special land, transportation land, water area, wetland, and other land.

[0040] Spatial control boundaries include planning control boundaries and administrative division boundaries: planning control boundaries include permanent basic farmland, urban development boundaries, drinking water source protection area boundaries, and nature reserve boundaries; administrative division boundaries include provinces, cities, and counties.

[0041] Ownership boundaries include real estate ownership boundaries and natural resource ownership boundaries: Real estate ownership boundaries include houses, collective land, forests, trees, land contract management rights, construction land, homesteads, sea areas, and others. Natural resource ownership boundaries include watercourses, forests, mountains, grasslands, wastelands, tidal flats, sea areas, uninhabited islands, minerals, and others.

[0042] S2. Perform internal verification based on the real-scene 3D model working base map.

[0043] S2-1. Verification of conflicts between boundaries and land use boundaries based on the base map of the real-world 3D model.

[0044] On the working base map of the real scene 3D model, check the contradiction between the boundary and the land category boundary. If there is a deviation between the boundary and the land category boundary, correct the boundary based on the data information provided by the working base map of the real scene 3D model.

[0045] Specifically, the base map data includes the spatial coordinates and texture attributes of the real-world 3D model, as well as the land use boundary information from the analysis data. Boundary correction involves two methods: combining the real-world 3D model with land use boundaries. Boundary correction based on the real-world 3D model involves interpreting the planar and elevation coordinates and textures of the features depicted in the model, and performing interactive operations such as adding, deleting, and modifying boundary vertices (i.e., area vectors and line vectors). Boundary correction based on land use boundaries involves selecting the corresponding land use boundaries and performing interactive operations such as capturing and following them to edit and correct the boundary.

[0046] S2-2. Verification of contradictions between boundaries and spatial control boundaries based on the working base map of the real-scene 3D model. Verify the contradictions between boundaries and spatial control boundaries on the working base map of the real-scene 3D model.

[0047] For areas within the boundary that involve permanent basic farmland or urban development boundaries, these areas are marked and extracted as the first conflicting spatial control boundary patches. Combining the land category boundaries in the base map of the real-world 3D model, the extracted first conflicting spatial control boundary patches are processed as follows: If the total area enclosed by land category boundaries such as cultivated land, orchards, commercial and service land, industrial and mining storage land, residential land, public management and public service land, special land, and transportation land accounts for more than 50% of the area of ​​the first conflicting spatial control boundary patch, then the boundary boundary is corrected to remove or avoid this first conflicting spatial control boundary patch; otherwise, no boundary boundary correction is necessary.

[0048] For drinking water source protection areas and nature reserves outside the boundary, they are marked and extracted as the second conflicting plots of the spatial control boundary. Based on the land use boundaries in the base map of the real-world 3D model, the extracted second conflicting plots of the spatial control boundary are processed as follows: If the total area enclosed by land use boundaries such as forest land, grassland, water area, and wetland accounts for more than 50% of the area of ​​the second conflicting plot, then the boundary boundaries are corrected to incorporate or include it into the second conflicting plot; otherwise, no boundary correction is required.

[0049] In this step, 50% is the preferred area threshold.

[0050] S2-3. Verification of Boundaries and Ownership Boundaries Based on the Real-Scene 3D Model Working Base Map

[0051] Verify the boundaries and ownership boundaries on the working base map of the real-world 3D model. For those involving real estate or natural resource ownership within the boundaries, mark and extract them as ownership boundary conflict patches. Based on the ownership boundaries in the working base map of the real-world 3D model, process the extracted ownership boundary conflict patches according to the following method:

[0052] If the total area enclosed by the boundaries of real estate ownership or natural resource ownership accounts for more than 50% of the area of ​​the conflicting ownership boundary plot, then the conflicting ownership boundary plot should be removed or avoided by modifying the boundary; otherwise, there is no need to modify the boundary.

[0053] In this step, 50% is the preferred area threshold.

[0054] S3. Conduct on-site boundary demarcation based on the working base map of the real-scene 3D model;

[0055] S3-1. On-site positioning of boundary inflection points based on the working base map of the real-scene 3D model.

[0056] For boundaries that require on-site demarcation, the boundary inflection points are located on-site using the positioning and measurement method, based on the actual 3D model working base map.

[0057] S3-2. Based on the real-scene 3D model working base map, the boundary inflection points that have been located on-site are verified and adjusted on-site.

[0058] For boundary inflection points that require verification and adjustment after on-site positioning, the boundary inflection points are added, deleted, and modified according to the adjustment method, based on the working base map of the real scene 3D model and typical local features or orientation features, to complete the correction operation, and the corrected inflection points are plotted on the working base map of the real scene 3D model.

[0059] S4. Based on the real-world 3D model working base map, conduct site selection and pre-marking of boundary markers and signboards.

[0060] S4-1. Visualizing boundary markers and signs based on a real-world 3D model working base map.

[0061] Boundary markers and signs are stored as point elements and uniformly represented symbolically. In this embodiment, boundary markers and signs are represented as cubes not based on a scale. Specifically, the word "sign" is added to the front view of the sign cube symbol. Boundary markers and signs are plotted on the working base map of the real-world 3D model.

[0062] S4-2. Analysis and simulation of boundary marker and signage site selection based on the real-world 3D model working base map.

[0063] Based on the fundamental and analytical data contained in the working base map of the real-scene 3D model, site selection analysis and simulation are conducted for boundary markers and signposts. This includes analyzing potential key areas (locations) and important turning points of the boundary boundary for pre-installation of boundary markers and signposts, and simulating and displaying these locations on the working base map of the real-scene 3D model. In this embodiment, key areas (locations) refer to the locations where the boundary boundary intersects with the boundaries of commercial and service land, industrial and mining storage land, residential land, public management and public service land, and transportation land. Important turning points refer to the four turning points corresponding to the maximum and minimum values ​​of the north coordinate and the maximum and minimum values ​​of the east coordinate.

[0064] In addition, boundary markers and signs can also be simulated during the aforementioned steps of internal verification or on-site boundary surveying. The simulated display effect of boundary markers and signs on the working base map of the real-world 3D model is shown in the image below. Figure 2 As shown, Figure 2 There are two pictures. The top picture shows the position of the boundary markers before adjustment, and the bottom picture shows the position of the boundary markers after adjustment.

[0065] By adopting the technical solution of this embodiment, the internal verification can be carried out based on the real-scene 3D model, the on-site boundary survey can be assisted by the real-scene 3D model, and the selection and pre-marking of boundary markers and signs can be carried out based on the real-scene 3D model. This can make the boundary survey and marking no longer constrained by traditional basic scale topographic maps and their digital products, and greatly improve work efficiency.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A boundary demarcation and marking method based on a real-scene 3D model, characterized in that, Includes the following steps: A working base map for a realistic 3D model is created. This working base map includes basic data and analytical data. The basic data includes the realistic 3D model and defined boundaries. The realistic 3D model includes a city-level oblique photogrammetry 3D model and a terrain-level 3D model. The data information of the realistic 3D model includes spatial coordinates and texture attribute information. The defined boundaries include surface vectors and line vectors. The analytical data includes land use boundaries, spatial control boundaries, and ownership boundaries. Based on the working base map, the following internal verification is carried out: verification of contradictions between boundaries and land category boundaries, verification of contradictions between boundaries and spatial control boundaries, and verification of contradictions between boundaries and ownership boundaries. The on-site boundary demarcation is assisted by the working base map, including: using the positioning measurement method to locate the boundary inflection points on the working base map, and performing on-site verification and adjustment of the boundary inflection points after the on-site location is completed; The selection and pre-marking of boundary markers and signs based on the working base map includes: visualizing the boundary markers and signs based on the working base map, and analyzing and simulating the selection of boundary markers and signs based on the working base map.

2. The boundary demarcation and marking method based on a real-scene 3D model according to claim 1, characterized in that, Conduct conflict verification of boundaries and land category boundaries, including: By interpreting the plane, elevation coordinates, and texture of ground features, boundary vertex points can be added, deleted, and modified. By selecting and tracking different land use boundaries, the boundary lines can be corrected.

3. The boundary demarcation and marking method based on a real-scene 3D model according to claim 1, characterized in that, Conduct a check for discrepancies in boundaries and spatial control limits, including: For areas within the boundary that involve permanent basic farmland or urban development boundaries, these areas are marked and extracted as the first conflicting spatial control boundary patches. Combined with the land use boundaries in the working base map, the extracted first conflicting spatial control boundary patches are processed as follows: If the total area enclosed by the boundaries of cultivated land, orchards, commercial and service land, industrial and mining storage land, residential land, public management and public service land, special land, and transportation land in the first conflicting spatial control boundary patch exceeds the area threshold, then the first conflicting spatial control boundary patch is removed or avoided by correcting the boundary boundary; otherwise, no boundary boundary correction is required. For drinking water source protection areas and nature reserves outside the boundary, they are marked and extracted as the second conflicting plots of the spatial control boundary. Combined with the land category boundaries in the working base map, the extracted second conflicting plots of the spatial control boundary are processed as follows: if the total area enclosed by the land category boundaries of forest land, grassland, water area, and wetland in the second conflicting plot of the spatial control boundary exceeds the area threshold of the second conflicting plot of the spatial control boundary, then the boundary boundary is corrected and the plot is added or incorporated into the second conflicting plot of the spatial control boundary; otherwise, the boundary boundary does not need to be corrected.

4. The boundary demarcation and marking method based on a real-scene 3D model according to claim 1, characterized in that, Conduct boundary and ownership boundary verification, including: For those involving real estate or natural resource ownership within the boundary, they are marked and extracted as ownership boundary conflict patches. Combining the ownership boundaries in the working base map, the extracted ownership boundary conflict patches are processed as follows: If the total area enclosed by the real estate ownership or natural resource ownership boundaries in the ownership boundary conflict patch exceeds the area threshold, then the ownership boundary conflict patch is removed or avoided by correcting the boundary boundary; otherwise, there is no need to correct the boundary boundary.

5. The boundary demarcation and marking method based on a real-scene 3D model according to claim 1, characterized in that, The boundary inflection points that have been located on-site are checked and adjusted on-site, including: adding, deleting and modifying boundary inflection points according to the adjustment method based on the working base map and typical local features or orientation features to complete the correction operation, and then plotting the corrected boundary inflection points on the working base map.

6. The boundary demarcation and marking method based on a real-scene 3D model according to claim 1, characterized in that, The visualization of boundary markers and signs based on the working base map includes: storing the boundary markers and signs as point elements and uniformly representing them with symbols; and plotting the boundary markers and signs on the working base map.

7. The boundary demarcation and marking method based on a real-scene 3D model according to claim 1, characterized in that, Based on the working base map, conduct analysis and simulation of the selection of boundary markers and signs, including: analyzing the potential key areas and important turning points of the boundary boundary, and simulating the placement of boundary markers and signs on the working base map.

8. The boundary demarcation and marking method based on a real-scene 3D model according to claim 7, characterized in that, The key areas refer to the parts where the boundary line intersects with the land category boundary line; the important turning points refer to the four turning points corresponding to the maximum and minimum values ​​of the north coordinate and the maximum and minimum values ​​of the east coordinate.

9. The boundary demarcation and marking method based on a real-scene 3D model according to claim 1, characterized in that, Boundary markers and signs are simulated during the internal verification or on-site boundary survey process.

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