Study on Fast Extraction of Landslide Environmental Indicator Parameters Based on High-Precision DEM and RS—A Case Study of Changleyuan Super Large-Scale Landslide in Jintai District, Baoji City, Shaanxi Province, China
DEM and RS are important data and ways in terms of landslide geo-hazard study. Referring to 3-D visual principle of Google Earth for reference, the author superimposes DEM (the accuracy is 5 m) derived from IRS-P5 and high spatial resolution QuickBird (0.61 m) data on the digital globe and thus results in 3-D visual image to study fast extraction method of landslide environmental indicator parameters. The result shows 3-D parameters of landslide environmental indicator can be extracted directly from image, and the method, which provides quantitative data for landslide geo-hazard evaluation and regional geo-hazards risk assessment, is objective, accurate and rapid.