proj4.defs("EPSG:3108","+proj=tmerc +lat_0=49.5 +lon_0=-2.41666666666667 +k=0.999997 +x_0=47000 +y_0=50000 +ellps=GRS80 +towgs84=-485.014055,-169.473618,-483.842943,7.78625453,4.39770887,4.10248899,0 +units=m +no_defs +type=crs");