Loess landform ditch line extraction method based on mean neighborhood

Abstract

The invention discloses a loess geomorphic ditch line extraction method based on a mean neighborhood, which comprises the following steps of firstly, taking the high-resolution grid DEM data of a research region as the basic data, and selecting a proper analysis window to carry out the mean neighborhood analysis according to the geomorphic type of the research region; subtracting the original DEMdata of the research area from a neighborhood analysis result, and extracting the planar data of a normal terrain area; and finally, editing and modifying the orthotopographic map spots, converting the orthotopographic map spots into the line data, and screening out the ditch lines according to the geographic meaning of the ditch lines to obtain a final ditch line extraction result. According to the method for extracting the loess landform ditch line based on the DEM data and the mean neighborhood, the more accurate and effective extraction of the loess landform ditch lines can be achieved, meanwhile, an existing ditch line extraction method system is supplemented, and the method has the guidance and practical significance for the loess plateau research in actual work.

Description

technical field [0001] The invention relates to a method for extracting along a loess plateau ditch, in particular to a method for extracting along a loess landform ditch based on a mean neighborhood. Background technique [0002] The study of the loess landform and its spatial differentiation is one of the key points in the study of the Loess Plateau. The ditch line, also known as the ditch margin line, valley margin line, ditch edge line, and mound edge line, is a special topographic structure line. The correct extraction and effective analysis of it is to explore the topography, soil erosion mode and land use of the Loess Plateau. The basis of the pattern. [0003] Accurate and efficient extraction along the ditch has always been an important task in the scientific research and production construction of the Loess Plateau. The extraction along the ditch mainly includes field measurement method, remote sensing image extraction method and DEM extraction method. The line ...

AI Technical Summary

Problems solved by technology

The line along the ditch can be obtained with a certain accuracy by using the field measurement method, but in general, the accuracy is greatly affected by the operator's subjectivity, and the extraction efficiency is low

The use of remote sensing images to delineate can obtain high-precision ditch lines, but when it comes to more complicated technical links such as later transfer drawing, it requires a higher level of knowledge and proficiency of the operator

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