Three-dimensional modeling method of DEM dynamic cutting geologic body model

Abstract

The invention discloses a three-dimensional modeling method for a DEM dynamic cutting geologic body model, and relates to the technical field of three-dimensional modeling, and the method comprises the following steps: starting a three-dimensional modeling system, and importing to-be-processed DEM earth surface model data and geologic body model data. Accurate fusion of the earth surface DEM data and the underground geologic body model is achieved, the spatial relation between the internal structure of the geologic body and the earth surface topography can be displayed more visually, the accuracy of geological interpretation is remarkably improved, a user can adjust the position, direction and elevation of a cutting surface in real time through an interactive operation interface, and the user experience is improved. The method supports two sectioning modes of taking a surface as a top and a surface as a bottom, meets the requirements of different geological analysis scenes, improves the applicability of the technology, can be widely applied to the fields of mineral exploration, engineering geology, hydrogeology and the like, and provides an efficient three-dimensional analysis tool for geological exploration, disaster prevention, urban planning and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of three-dimensional modeling, in particular to a three-dimensional modeling method of a DEM dynamically cutting geological body model. Background Art

[0002] Cutting geological body models are widely used in many fields such as geological exploration, terrain analysis, urban planning, environmental monitoring, disaster prevention and management. They can provide more accurate and intuitive three-dimensional visualization models of geological bodies to assist research and decision-making in related fields. Through dynamic cutting technology, the present invention can effectively process and display geological body structures of different depths and ranges, providing new technical means for the analysis and research of geological bodies.

[0003] Accurate three-dimensional modeling of geological bodies is crucial in many fields, including geological exploration, mining development, civil engineering, and terrain analysis. Traditional three-dimensional geological modeling methods usually rely on geological exploration data, such as borehole, seismic, gravity, and magnetic measurements. These data are converted into geological body models in three-dimensional space through methods such as interpolation and extrapolation. However, these methods often have problems such as complex data processing, untimely model updates, and difficulty in dynamically reflecting geological changes.

[0004] With the development of computer technology, digital elevation models (DEMs) have been widely used in three-dimensional terrain modeling because they can provide an accurate description of the terrain surface. DEM models can represent the elevation information of the terrain surface through a series of regular or irregular grid points, thus providing new possibilities for three-dimensional modeling of geological bodies. However, existing DEM models still have limitations in processing the internal structure of geological bodies, especially in the cutting of geological bodies and the three-dimensional expression of internal structures.

[0005] Existing geological body cutting technologies usually adopt static cutting methods, that is, cutting according to predetermined rules or paths in three-dimensional space to reveal the internal structure of the geological body. Although these methods can show the internal structure of the geological body to a certain extent, they lack flexibility and dynamics and are difficult to adapt to the complexity and variability of the geological body structure. In addition, these methods are inefficient when processing large-scale data and are difficult to meet the needs of real-time or near-real-time geological body modeling. To this end, we propose a three-dimensional modeling method for DEM dynamic cutting of geological body models. Summary of the Invention

[0006] The purpose of the present invention is to provide a three-dimensional modeling method for dynamically cutting a geological body model using a DEM to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a three-dimensional modeling method for a DEM dynamic cutting geological body model, comprising the following steps:

[0008] S1: Start the 3D modeling system and import the DEM surface model data and geological body model data to be processed. The 3D modeling system loads an interactive operation interface, showing preview images of the DEM surface model and geological body model, as well as optional cutting surface tools and parameter setting options;

[0009] S2: Interactive operations are performed through the interface, including selecting the DEM surface model to be cut, defining the position and direction of the cutting surface, and setting the elevation parameters of the cutting surface. Inputting numerical values ​​can accurately adjust the vertical position of the cutting surface.

[0010] S3: The user selects the cutting surface position setting mode to determine the top or bottom boundary of the geological model after cutting;

[0011] S4: After clicking the "Cut" button, the dynamic cutting algorithm is started. The algorithm is based on the dynamic interactive cutting mechanism of DEM data and geological model, allowing the model to be cut in real time according to the parameters set by the user;

[0012] S5: Elevation correction technology is applied during the sectioning process to ensure the accurate spatial position relationship between the cutting surface and the DEM surface model. After the sectioning calculation is completed, the sectioning results are rendered in real time and displayed on the interactive interface.

[0013] Preferably, the section position setting modes in step S2 include one of the top and the bottom.

[0014] Preferably, the elevation correction technology in step S5 compares the elevation of the cutting surface with the corresponding elevation value in the DEM data, and adjusts the position of the cutting surface to eliminate errors.

[0015] Preferably, the dynamic interactive sectioning mechanism of the DEM data and the geological body model in step S4 is as follows: the DEM data needs to be preprocessed to match the data format and coordinate system of the geological body model, the geological body model is constructed based on geological exploration data, the discrete geological data is converted into a continuous model in three-dimensional space, and the DEM data and the geological body model are integrated into the same three-dimensional space environment to ensure spatial consistency, thereby providing a basis for dynamic interactive sectioning.

[0016] Preferably, the DEM data preprocessing includes format conversion, coordinate system one and resolution adjustment.

[0017] Preferably, when the sectioning result is saved as a file, the three-dimensional modeling system provides a variety of file format options. After selecting a suitable format, the sectioning result is exported as a file and saved in a location specified by the user.

[0018] Preferably, the sectioning result formats include OBJ, STL and PLY.

[0019] Preferably, the sectioning calculation in step S5 is specifically as follows: according to the cutting surface parameters defined by the user, the spatial relationship between the cutting surface and the DEM data and the geological body model is calculated, which includes determining the intersection point of the cutting surface and the DEM surface model, and the intersection area of ​​the cutting surface and the geological body model.

[0020] Preferably, the sectioning calculation traverses each grid point or voxel of the geological body model to determine its positional relationship with the cutting surface.

[0021] Preferably, the discrete geological data is converted into a continuous model in three-dimensional space by using interpolation and extrapolation methods.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] Through dynamic cutting technology, the present invention realizes the precise fusion of surface DEM data and underground geological body model, which can more intuitively display the spatial relationship between the internal structure of the geological body and the surface topography, and significantly improves the accuracy of geological interpretation. Through the interactive operation interface, users can adjust the position, direction and elevation of the cutting surface in real time, and support two cutting modes: surface top and surface bottom, which meet the needs of different geological analysis scenarios and improve the applicability of the technology. Through dynamic cutting and real-time visualization, the time for model updating and adjustment is reduced. It is particularly suitable for rapid analysis and decision support of large-scale geological data, and can be widely used in mineral exploration, engineering geology, hydrogeology and other fields, providing efficient three-dimensional analysis tools for geological exploration, disaster prevention, urban planning, etc., with high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a flow chart of the modeling method of the present invention;

[0025] Figure 2 This is a schematic diagram of the interactive interface of the three-dimensional modeling system of the present invention;

[0026] Figure 3 This is a schematic diagram of the geological model before cutting in the present invention;

[0027] Figure 4 This is a schematic diagram of the geological model after sectioning in the present invention. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example: See Figures 1 to 4 The present invention provides a technical solution: a three-dimensional modeling method of a DEM dynamic cutting geological body model, comprising the following steps:

[0030] S1: Start the 3D modeling system and import the DEM surface model data and geological body model data to be processed. The 3D modeling system loads an interactive operation interface, showing preview images of the DEM surface model and geological body model, as well as optional cutting surface tools and parameter setting options;

[0031] S2: Interactive operations are performed through the interface, including selecting the DEM surface model to be cut, defining the position and direction of the cutting surface, and setting the elevation parameters of the cutting surface. Inputting numerical values ​​can accurately adjust the vertical position of the cutting surface.

[0032] S3: The user selects the cutting surface position setting mode to determine the top or bottom boundary of the geological model after cutting;

[0033] S4: After clicking the "Cut" button, the dynamic cutting algorithm is started. The algorithm is based on the dynamic interactive cutting mechanism of DEM data and geological model, allowing the model to be cut in real time according to the parameters set by the user;

[0034] S5: Elevation correction technology is applied during the sectioning process to ensure the accurate spatial position relationship between the cutting surface and the DEM surface model. After the sectioning calculation is completed, the sectioning results are rendered in real time and displayed on the interactive interface.

[0035] As a further limitation of the present invention, the section position setting modes in step S2 include the section as top and the section as bottom.

[0036] The elevation correction technology in step S5 compares the elevation of the cutting surface with the corresponding elevation value in the DEM data and adjusts the position of the cutting surface to eliminate the error.

[0037] The dynamic interactive sectioning mechanism of DEM data and geological body model in step S4 is as follows: DEM data needs to be preprocessed to match the data format and coordinate system of the geological body model; the geological body model is constructed based on geological exploration data; discrete geological data is converted into a continuous model in three-dimensional space; DEM data and geological body model are integrated into the same three-dimensional space environment to ensure spatial consistency, providing a basis for dynamic interactive sectioning.

[0038] DEM data preprocessing includes format conversion, coordinate system and resolution adjustment.

[0039] When saving the sectioning results as files, the 3D modeling system provides a variety of file format options. After selecting the appropriate format, the sectioning results are exported as files and saved in the location specified by the user.

[0040] The sectioning result formats include OBJ, STL and PLY.

[0041] The sectioning calculation in step S5 is specifically as follows: according to the cutting plane parameters defined by the user, the spatial relationship between the cutting plane and the DEM data and the geological body model is calculated, which includes determining the intersection point of the cutting plane and the DEM surface model, and the intersection area of ​​the cutting plane and the geological body model.

[0042] The sectioning calculation will traverse each grid point or voxel of the geological model to determine its positional relationship with the cutting surface.

[0043] Discrete geological data are converted into continuous models in three-dimensional space using interpolation and extrapolation methods.

[0044] The specific implementation of this embodiment is as follows: the 3D modeling system provides an interactive operation interface, and the user can select the DEM surface model to be cut and the cutting surface by "clicking". After the cutting surface is selected, the 3D modeling system supports dynamic correction of the cutting surface elevation. The user can accurately adjust the vertical position of the cutting surface by entering a value (for example, "0.00") to ensure the accuracy of the cutting operation. The cutting surface position setting provides two modes: the user can choose to use the cutting surface as the top boundary ("surface as top") or the bottom boundary ("surface as bottom") after cutting, thereby flexibly controlling the cutting direction and results;

[0045] The 3D modeling system supports sectioning of "models to be cut" (such as volume models or DEM surface models) and triggers calculations through the "Cut" button. After the sectioning is completed, the user can choose to save the results as a file ("Output to File") for subsequent analysis and application. In addition, the 3D modeling system explicitly limits the current support to only DEM surface and volume model sectioning operations to ensure the applicability and stability of the algorithm. The entire process is guided step by step by the user through a graphical interface. Combined with elevation correction and ground position setting functions, high-precision sectioning of complex terrain or structures is achieved.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional modeling method for dynamically cutting a geological body model using a DEM, characterized by: The following steps are involved: S1: Start the 3D modeling system and import the DEM surface model data and geological body model data to be processed. The 3D modeling system loads an interactive operation interface, showing preview images of the DEM surface model and geological body model, as well as optional cutting surface tools and parameter setting options; S2: Interactive operations are performed through the interface, including selecting the DEM surface model to be cut, defining the position and direction of the cutting surface, and setting the elevation parameters of the cutting surface. Inputting numerical values ​​can accurately adjust the vertical position of the cutting surface. S3: The user selects the cutting surface position setting mode to determine the top or bottom boundary of the geological model after cutting; S4: After clicking the "Cut" button, the dynamic cutting algorithm is started. The algorithm is based on the dynamic interactive cutting mechanism of DEM data and geological model, allowing the model to be cut in real time according to the parameters set by the user; S5: Elevation correction technology is applied during the sectioning process to ensure the accurate spatial position relationship between the cutting surface and the DEM surface model. After the sectioning calculation is completed, the sectioning results are rendered in real time and displayed on the interactive interface.

2. The three-dimensional modeling method of a DEM dynamic cutting geological body model according to claim 1, characterized in that: The section position setting modes in step S2 include the top face and the bottom face.

3. The three-dimensional modeling method of a DEM dynamic cutting geological body model according to claim 1, characterized in that: The elevation correction technology in step S5 compares the elevation of the cutting surface with the corresponding elevation value in the DEM data, and adjusts the position of the cutting surface to eliminate errors.

4. The three-dimensional modeling method of a DEM dynamic cutting geological body model according to claim 1, characterized in that: The dynamic interactive sectioning mechanism between the DEM data and the geological body model in step S4 is specifically as follows: the DEM data needs to be preprocessed to match the data format and coordinate system of the geological body model; the geological body model is constructed based on geological exploration data; the discrete geological data is converted into a continuous model in three-dimensional space; the DEM data and the geological body model are integrated into the same three-dimensional space environment to ensure spatial consistency, thereby providing a basis for dynamic interactive sectioning.

5. The three-dimensional modeling method of a DEM dynamic cutting geological body model according to claim 4 is characterized in that: The DEM data preprocessing includes format conversion, coordinate system conversion and resolution adjustment.

6. The three-dimensional modeling method of a DEM dynamic cutting geological body model according to claim 1, characterized in that: When the sectioning result is saved as a file, the 3D modeling system provides a variety of file format options. After selecting the appropriate format, the sectioning result is exported as a file and saved in a location specified by the user.

7. The three-dimensional modeling method of a DEM dynamic cutting geological body model according to claim 1, characterized in that: The sectioning result formats include OBJ, STL and PLY.

8. The three-dimensional modeling method of a DEM dynamic cutting geological body model according to claim 1, characterized in that: The sectioning calculation in step S5 is specifically as follows: according to the cutting plane parameters defined by the user, the spatial relationship between the cutting plane and the DEM data and the geological body model is calculated, which includes determining the intersection point of the cutting plane and the DEM surface model, and the intersection area of ​​the cutting plane and the geological body model.

9. The three-dimensional modeling method of a DEM dynamic cutting geological body model according to claim 8, characterized in that: The sectioning calculation traverses each grid point or voxel of the geological body model to determine its positional relationship with the cutting surface.

10. The three-dimensional modeling method of a DEM dynamic cutting geological body model according to claim 4, characterized in that: The discrete geological data are converted into a continuous model in three-dimensional space by using interpolation and extrapolation methods.

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