FAILURE: Not enough arguments. GDAL 2.2.1, released 2017/06/23 Usage: - To generate a shaded relief map from any GDAL-supported elevation raster : gdaldem hillshade input_dem output_hillshade [-z ZFactor (default=1)] [-s scale* (default=1)] [-az Azimuth (default=315)] [-alt Altitude (default=45)] [-alg ZevenbergenThorne] [-combined | -multidirectional] [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generates a slope map from any GDAL-supported elevation raster : gdaldem slope input_dem output_slope_map [-p use percent slope (default=degrees)] [-s scale* (default=1)] [-alg ZevenbergenThorne] [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generate an aspect map from any GDAL-supported elevation raster Outputs a 32-bit float tiff with pixel values from 0-360 indicating azimuth : gdaldem aspect input_dem output_aspect_map [-trigonometric] [-zero_for_flat] [-alg ZevenbergenThorne] [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generate a color relief map from any GDAL-supported elevation raster gdaldem color-relief input_dem color_text_file output_color_relief_map [-alpha] [-exact_color_entry | -nearest_color_entry] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] where color_text_file contains lines of the format "elevation_value red green blue" - To generate a Terrain Ruggedness Index (TRI) map from any GDAL-supported elevation raster gdaldem TRI input_dem output_TRI_map [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generate a Topographic Position Index (TPI) map from any GDAL-supported elevation raster gdaldem TPI input_dem output_TPI_map [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generate a roughness map from any GDAL-supported elevation raster gdaldem roughness input_dem output_roughness_map [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] Notes : Scale is the ratio of vertical units to horizontal for Feet:Latlong use scale=370400, for Meters:LatLong use scale=111120

Usage: - To generate a shaded relief map from any GDAL-supported elevation raster : gdaldem hillshade input_dem output_hillshade [-z ZFactor (default=1)] [-s scale* (default=1)] [-az Azimuth (default=315)] [-alt Altitude (default=45)] [-alg ZevenbergenThorne] [-combined | -multidirectional] [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generates a slope map from any GDAL-supported elevation raster : gdaldem slope input_dem output_slope_map [-p use percent slope (default=degrees)] [-s scale* (default=1)] [-alg ZevenbergenThorne] [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generate an aspect map from any GDAL-supported elevation raster Outputs a 32-bit float tiff with pixel values from 0-360 indicating azimuth : gdaldem aspect input_dem output_aspect_map [-trigonometric] [-zero_for_flat] [-alg ZevenbergenThorne] [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generate a color relief map from any GDAL-supported elevation raster gdaldem color-relief input_dem color_text_file output_color_relief_map [-alpha] [-exact_color_entry | -nearest_color_entry] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] where color_text_file contains lines of the format "elevation_value red green blue" - To generate a Terrain Ruggedness Index (TRI) map from any GDAL-supported elevation raster gdaldem TRI input_dem output_TRI_map [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generate a Topographic Position Index (TPI) map from any GDAL-supported elevation raster gdaldem TPI input_dem output_TPI_map [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] - To generate a roughness map from any GDAL-supported elevation raster gdaldem roughness input_dem output_roughness_map [-compute_edges] [-b Band (default=1)] [-of format] [-co "NAME=VALUE"]* [-q] Notes : Scale is the ratio of vertical units to horizontal for Feet:Latlong use scale=370400, for Meters:LatLong use scale=111120