proj4.defs("EPSG:3987","+proj=tmerc +lat_0=-9 +lon_0=28 +k=1 +x_0=200000 +y_0=500000 +ellps=clrk66 +towgs84=-103.746,-9.614,-255.95,0,0,0,0 +units=m +no_defs +type=crs");