GEOGCS["GCS_Guam_1963",DATUM["D_Guam_1963",SPHEROID["Clarke_1866",6378206.4,294.978698213898],EXTENSION["PROJ4_GRIDS","us_noaa_guhpgn.tif"]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]