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Solid three-dimensional model construction method for monoclinic rock stratum structure landform

A technology of three-dimensional models and construction methods, which is applied in the field of geographic information technology applications, and can solve problems such as different and different modeling methods

Active Publication Date: 2019-08-23
南京泛在地理信息产业研究院有限公司 +1
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Problems solved by technology

However, the geological knowledge used by different types of structural geomorphic entities is different, so the modeling methods are different. At present, there is no knowledge-driven 3D modeling method for monocline structural geomorphic entities

Method used

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  • Solid three-dimensional model construction method for monoclinic rock stratum structure landform
  • Solid three-dimensional model construction method for monoclinic rock stratum structure landform
  • Solid three-dimensional model construction method for monoclinic rock stratum structure landform

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Embodiment Construction

[0048] This embodiment provides a method for constructing a solid three-dimensional model of monoclinic rock structure and landform. The process is as follows figure 1 shown. In this example, Nanjing Zijin Mountain is taken as the research area. Nanjing Zijin Mountain is a typical single-sided mountain in the monocline structure and landform. Select the coordinate system as the Nanjing 92 local coordinate system and the topographic and geological map of the Zijin Mountain area in Nanjing with a scale of 1:50000 ( figure 2 ), there are 5 groups of monoclinic rock formations in the figure, and the occurrence of the rock formations has obvious changes from left to right. There are 3 faults, and the fault lines are the lateral boundaries of the rock formations. It is vectorized to obtain a digital topographic geological map ( image 3 ). Since the uppermost stratum of Zijin Mountain (Huangmaqing Formation) has been severely eroded and lacks the upper stratum boundary, it is im...

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Abstract

The invention discloses a solid three-dimensional model construction method for a monoclinic rock stratum structure landform, and the method comprises the steps: (1) calculating the attitude of a monoclinic rock stratum according to a monoclinic rock stratum geological map and DEM data, and obtaining a geological boundary line set and an attitude set; (2) according to the rock stratum attitude set, dividing the geological boundary line into a plurality of rock stratum surface boundary line segments with consistent attitudes; (3) according to the boundary line segment of the rock stratum surface, adopting a occurrence deduction method to obtain an attitude deduction point through deduction, and obtaining a rock stratum surface comprising the rock stratum surface and the rock stratum side surface; (4) according to the rock stratum side faces, generating fault layer faces through sequential combination; (5) according to the geological boundary line set, based on Morphing, carrying out interpolation to generate interpolation points of all rock layers in the rock layer set; and (6) generating the TIN of the rock stratum surface, the rock stratum side surface and the fault layer surfaceby adopting a point-by-point insertion method according to the interpolation points of the rock stratum surface, the fault layer surface and the rock stratum surface, and performing sewing to obtain asolid three-dimensional model. The method is higher in accuracy.

Description

technical field [0001] The invention relates to the application field of geographic information technology, in particular to a method for constructing a solid three-dimensional model of monoclinic rock layer structure and landform. Background technique [0002] The non-parametric and heterogeneous characteristics of structural and geomorphic entities, as well as the widespread existence of geological structures such as faults and folds, make structural and geomorphic entities mostly based on geological survey data such as geological drilling and geological sections, and use data-driven modeling methods to carry out modeling. However, this method relies too much on modeling data such as geological boreholes and geological profiles, which affects its application range and modeling quality to a certain extent. [0003] Faced with this deficiency, more and more scholars have begun to study knowledge-driven modeling methods. Compared with the data-driven modeling method, this m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/05
CPCG06T17/05
Inventor 李安波王凯亮万夏闾国年
Owner 南京泛在地理信息产业研究院有限公司
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