conc_chl conc_chl conc_tsm conc_tsm OR PROJCS["WGS 84 / Auto UTM", GEOGCS["WGS84(DD)", DATUM["WGS84", SPHEROID["WGS84", 6378137.0, 298.257223563]], PRIMEM["Greenwich", 0.0], UNIT["degree", 0.017453292519943295], AXIS["Geodetic longitude", EAST], AXIS["Geodetic latitude", NORTH]], PROJECTION["Transverse_Mercator"], PARAMETER["central_meridian", -3.0], PARAMETER["latitude_of_origin", 0.0], PARAMETER["scale_factor", 0.9996], PARAMETER["false_easting", 500000.0], PARAMETER["false_northing", 0.0], UNIT["m", 1.0], AXIS["Easting", EAST], AXIS["Northing", NORTH]] true SRTM 1Sec Grid Nearest -4.6176392298946976 56.337458448268684 -2.0619251301385715 55.84704000104481 20.0 20.0