PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"],AUTHORITY["EPSG","3857"]] -14236366.61466772, 38.00964586157284, 0, 6728989.271149526, 0, -38.00964586157284 Red vrt_webmercator.vrt 1 1:86,254.999999999999943:86,255:0,255:0 Green vrt_webmercator.vrt 1 1:180,254.999999999999943:180,255:0,255:0 Blue vrt_webmercator.vrt 1 1:233,254.999999999999943:233,255:0,255:0 Alpha vrt_webmercator.vrt 1 1:255,254.999999999999943:255,255:0,255:0