File Format GeoTIFF Esri Binary Grid Esri ASCII Grid Esri GridFloat DTED SDTS USGS DEM ER Mapper ERS ENVI ERDAS IMAGINE Extension .tif or .tiff .adf .asc or .grd .flt .dt0, .dt1, or .dt2 .DDF .dem .ers .dat .img WMS Database: Search updated database 25 new servers and 1374 ...