A Method of Dike Line Data Extraction Based on High Resolution Digital Terrain

Abstract

A method for extracting embankment line data based on high-resolution digital terrain, which aims at high-resolution digital terrain data of embankments, automatically constructs a detection ring on the digital terrain along the direction of embankment travel, and finds the intersecting grid between the ring and the digital terrain The grid unit with the highest mid-elevation value is used as the center of the circle to continue to construct the detection circle until the digital terrain detection of the embankment is completed, and the high-precision embankment line data is constructed by connecting the center points of the circle, so as to realize the detection of embankment line data. Automatic extraction. Compared with the traditional manual field surveying and mapping method, the present invention greatly improves the efficiency of embankment line data production, and compared with the current embankment line data extraction common minimum cost path analysis method, matrix method, vertical line method and point matching vertical line Compared with other methods, it better solves the problem of abnormal line data extraction due to damage to dikes. The present invention has great advantages in both online data extraction accuracy and extraction efficiency, and is a better embankment line data extraction. method.

Description

technical field [0001] The invention relates to the technical field of water conservancy information, in particular to a method for extracting embankment line data based on high-resolution digital topography. Background technique [0002] Dikes are an important measure for flood control. At present, the length of dikes built in my country has reached more than 200,000 kilometers, and they have played an important role in flood control and disaster relief. The specifications and shapes of dikes, such as the minimum elevation of the dike, the width of the crest, and the slope of the embankment, usually have a set of design specifications. In China, the latest design specifications for dikes are the national standards "Code for Design of Dike Engineering" released in 2013 ( GB 50286-2013). With the extension of the service life of the embankment, the flood control capacity of the embankment will decrease due to flood erosion, subsidence of embankment foundation, human activiti...

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Problems solved by technology

[0006] Aiming at the shortcomings of conventional high-resolution DEM to extract embankment line data, such as low efficiency, manual intervention, and high sensitivity to embankment damage, resulting in poor adaptability of the method, the present invention proposes an embankment based on high-resolution digital terrain Line data extraction method, which uses the ring detection method to construct a fully automatic extraction method for embankment line data, which can efficiently realize large-scale, high-precision embankment line data extraction, and meet the high-efficiency, large-scale, high-precision and automation of embankment centerlines extraction request

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