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A method for automatic identification and extraction of upright rock formations

A rock formation, flat technology, applied in the field of geographic information technology applications, can solve problems such as low efficiency, accuracy varies from person to person, and quality is difficult to guarantee

Active Publication Date: 2018-11-09
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the artificial identification method is inefficient, the accuracy varies from person to person, and the quality is difficult to guarantee

Method used

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  • A method for automatic identification and extraction of upright rock formations
  • A method for automatic identification and extraction of upright rock formations
  • A method for automatic identification and extraction of upright rock formations

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Embodiment Construction

[0050] The effect of the present invention will be further illustrated below in conjunction with the accompanying drawings and by describing an example of automatically identifying and marking upright rock formations. In this embodiment, a topographic geological map of a certain place is selected as sample data (mainly including contour layers and geological division layers), such as figure 2 shown.

[0051] (1) Reading and preprocessing of rock boundary

[0052] Step 1.1 Load the geological decent layer data "geological division" in shp format, read the rock layer elements and read the collection Stratums={sta i |i=1, 2, 3, . . . , 25}, this embodiment includes a total of 25 rock layer elements.

[0053] The basic parameters of the topographic and geological map layer loaded in step 1.2 are: width 2316.33m, height 1705.86m, map boundary point set BoundaryP={(461.44,-1999.47),(507.27,-1999.54),(716.37,-1999.88), (1,646.99,-2001.37),(1749.90,-2001.53),(1,891.30,-2001.76),(2...

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Abstract

The invention discloses an automated identification and extraction method of a vertical stratum on the basis of the surface layer and the contour line layer of a geologic body. The method comprises the following steps: 1) preprocessing a stratum surface element in a geologic map, and eliminating the influence of a polygonal inner island (hole) and a mapsheet boundary to obtain a linear stratum boundary line element; 2) carrying out Hough Transform on points on the stratum boundary line element, transforming the stratum boundary line element into one group of curves, judging whether the distribution of curve points of intersection is within a preset window or not to realize the extraction of the flat part of the stratum boundary line element; and 3) carrying out fault boundary line filtering, smooth boundary line filtering and non-parallel paired boundary line filtering on the extracted flat stratum boundary line, screening the paired boundary lines which form the vertical stratum, and drawing the vertical stratum.

Description

technical field [0001] The invention belongs to the application field of geographic information technology, and in particular relates to a method for realizing automatic identification and extraction of upright rock layers by using a Hough transform algorithm based on a geological decent layer and a contour layer. Background technique [0002] According to the type of tectonic occurrence, rock strata can be divided into horizontal strata, inclined strata and upright strata. Among them, the upright rock layer refers to the rock layer with an inclination angle greater than 85°, which generally occurs in areas with strong structures. Its geological boundary extends straight along its strike and is not affected by topography. In conventional geological applications, upright rock formations are mainly identified manually by reading geological maps and looking for elements whose boundaries are in the form of parallel lines. The existing computer automatic map reading technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00
CPCG06T2207/20061G06T2207/30184
Inventor 陈楹李安波姚蒙蒙李梦圆
Owner NANJING NORMAL UNIVERSITY