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39 results about "Contour mapping" patented technology

Method and system for searching safety zone of elevation map based on Monte Carlo algorithm

The invention provides a method and system for searching a safety zone of an elevation map based on a Monte Carlo algorithm. The method comprises the following steps: using the Monte Carlo algorithm to simulate an acquired obstacle threshold segmentation map of a surface contour map and a contour map of a surface elevation map, and obtaining a safe landing preselected zone of a detector; transforming the surface elevation map into a two-dimensional binary matrix, using the Monte Carlo algorithm to perform plane fitting on random extracted matrix elements of the two-dimensional binary matrix, and obtaining a fitting plane slope; taking a zone corresponding to a minimum value of the fitting plane slope as a safe landing zone of the detector, and detecting a corresponding central point as a safe landing point of the detector; and acquiring an optimum zone for the safe landing of the detector according to the safe landing preselected zone, the safe landing zone of the detector acquired by the fitting plane slope and the condition of safe landing of the detector. By adopting the method and system for searching the safety zone of the elevation map based on the Monte Carlo algorithm provided by the invention, the problems of time-consuming, omission and so on in the traditional searching method of the detector can be solved.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Contour line drawing method based on ArcGIS and AutoCAD

The invention relates to a contour line drawing method based on ArcGIS and AutoCAD, and the method comprises the following steps: S1, downloading required digital elevation model data matched with a real terrain, and carrying out contour line extraction through opening in ArcGIS to obtain a contour line shp layer; s2, adding entity attributes in the CAD to the contour line shp layer, and assigning a 'Contour' attribute in the contour line shp layer to an Element in the CAD attribute in an attribute table; checking whether a contour line crossing phenomenon exists in the contour line shp layer or not; s3, exporting by utilizing an ArcGIS contour line shp layer to obtain a dwg format file; s4, opening the dwg-format file by using AutoCAD, and ungrouping the contour lines to obtain a dwg-format file with the contour lines of the three-dimensional polyline and the two-dimensional polyline at the same time; s5, opening the dwg format file by utilizing ArcGIS, and converting a three-dimensional polyline in the contour line into a two-dimensional polyline to obtain a contour line shp layer; and S6, exporting the contour line shp layer into a dwg format file again by utilizing ArcGIS, wherein the dwg format file has a contour line layer containing elevation information.
Owner:SHANGHAI INVESTIGATION DESIGN & RES INST
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