Earth and rockfill dam deformation earthquake damage quantitative evaluation method based on DEM digital terrain analysis
A digital terrain and quantitative evaluation technology, applied in geometric CAD, special data processing applications, design optimization/simulation, etc., can solve the failure of deformation monitoring benchmark failure, the difficulty of analyzing and evaluating the overall deformation of the dam body, and affecting the absolute deformation of the earth-rock dam body Quantity acquisition and other issues
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[0030] Digital Elevation Model (DEM), referred to as DEM, is a data set of the plane coordinates of the earth's surface topography and geomorphology grid points and their elevations, or a digital description of the three-dimensional surface shape space feature vectors and their attribute characteristics such as longitude, latitude, and altitude. . Various terrain elements such as slope, aspect, and roughness can be directly or indirectly extracted from DEM.
[0031] The construction of DEM mainly adopts regular grid model (Regular Square Grid, RSG) or irregular triangulated network model (Triangulated Irregular Networks, TIN). The data storage method of TIN is more complicated than that of RSG. Its advantage is that it can change the density of sampling points and determine the location of sampling points according to the complexity of terrain fluctuations, and avoid data redundancy in flat terrain. , valley lines, terrain change lines, etc. represent digital elevation featur...
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