AUTOMATIC RECOGNITION METHOD OF CONTINENTAL SLOPE FOOT POINT BASED ON TERRAIN GRID

摘要

The present invention relates to a recognition method of submarine topography, and in particular, to an automatic recognition method of foot point of continental slope based on topography grid. The present invention comprises the steps of cutting a topography grid model through a straight line or a broken line to generate a two-dimensional topography section line, then carrying out first derivation on the two-dimensional topography section to generate a slope section line and a second derivative section line, then obtaining an extreme point of the second derivative section line, using a D-P algorithm to obtain a D-P topography section after second simplification, then carrying out second derivation on the D-P topography section and using a topography and slope judgment method to recognize and eliminate concave hull topography in the D-P section, and finally using such judgment methods as slope, water depth, second derivation, concavity and convexity, continuity and segmentation and the like based on the D-P topography, slope and second derivative section to form an recognition method. The present invention has the advantages that the present invention has accurate mapping data, is convenient to operate, and is less affected by the natural weather in coastal mapping process of our country, and the like during a costal mapping process in our country.