proj4 = '+proj=tmerc +lat_0=37.75 +lon_0=-122.45 +k=1.000007 +x_0=48000 +y_0=24000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs' m = Map(256,256,proj4) lyr = Layer('Name',proj4)