GIS Data and Data Sources DEM, TIGER, DLG, LULC, Soils, DOQQ, DRG
GIS Data and Data Sources DEM, TIGER, DLG, LULC, Soils, DOQQ, DRG. 1. Digital Elevation Models (DEM). The elevation value are stored as a matrix of regularly spaced ground positions Each data point represents the elevation of the grid cell in which it is located. 1. DEM 1:24,000 .
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