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Automated identification and extraction method of vertical stratum

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

Active Publication Date: 2016-10-12
NANJING NORMAL UNIVERSITY
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  • Claims
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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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  • Automated identification and extraction method of vertical stratum
  • Automated identification and extraction method of vertical stratum

Examples

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Embodiment Construction

[0050] The effects of the present invention will be further described below in conjunction with the accompanying drawings and by describing an example of automatically identifying and marking vertical rock formations. This embodiment selects the topographic and geological map of a certain place as example data (mainly including contour layers and geological division layers), such as figure 2 shown.

[0051] (1) Rock boundary reading and preprocessing

[0052] Step 1.1 Load the geological decent layer data "geological division" in shp format, read the rock layer elements into the set Stratums={sta i |i=1, 2, 3, . . . , 25}, this embodiment contains 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, 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),(2378.58,-2,002.53),(...

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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 formations by using a Hough transform algorithm based on a geological surface layer and a contour layer. Background technique [0002] According to the type of structural occurrence, rock formations can be divided into horizontal rock formations, inclined rock formations and vertical rock formations. Among them, the vertical rock formation refers to the rock formation with a dip angle greater than 85°, which generally occurs in areas with strong structures. Its geological boundary extends in a straight line along its strike and is not affected by terrain. In conventional geological applications, it is mainly to manually identify vertical rock formations by reading geological maps and looking for elements whose boundaries are in the form of parallel straight line...

Claims

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Application Information

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