I am new to GIS and I want to read population data from a GeoTiff Grid using the java geotools library.

The following throws a runtime error

GridCoverage2D image = new GeoTiffReader(f);

Error message: GeoTiffMetadata2CRSAdapter::createCoordinateSystem:Only Geographic & Projected Systems are supported.

Is there a way to have geotools to use Mollweide ? Or can I convert the tiff file ?

Below is the gdalinfo. Thank you ! Peter

Driver: GTiff/GeoTIFF Files: GHS_POP_GPW42015_GLOBE_R2015A_54009_1k_v1_0.tif GHS_POP_GPW42015_GLOBE_R2015A_54009_1k_v1_0.tif.ovr GHS_POP_GPW42015_GLOBE_R2015A_54009_1k_v1_0.tif.aux.xml Size is 35497, 15236 Coordinate System is: PROJCS["World_Mollweide", GEOGCS["GCS_WGS_1984", DATUM["D_WGS_1984", SPHEROID["WGS_1984",6378137.0,298.257223563]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.017453292519943295]], PROJECTION["Mollweide"], PARAMETER["False_Easting",0.0], PARAMETER["False_Northing",0.0], PARAMETER["Central_Meridian",0.0], UNIT["Meter",1.0]] Origin = (-17619594.547443531453609,8751029.461868489161134) Pixel Size = (1000.000000000000000,-1000.000000000000000) Metadata: AREA_OR_POINT=Area Image Structure Metadata: COMPRESSION=LZW INTERLEAVE=BAND Corner Coordinates: Upper Left (-17619594.547, 8751029.462) ( 5d15'16.97"W, 83d38'22.73"N) Lower Left (-17619594.547,-6484970.538) (107d 3'58.73"E, 55d59' 2.97"S) Upper Right (17877405.453, 8751029.462) ( 15d52' 0.05"E, 83d38'22.73"N) Lower Right (17877405.453,-6484970.538) (103d21'55.35"W, 55d59' 2.97"S) Center ( 128905.453, 1133029.462) ( 1d17'47.25"E, 9d10'43.07"N)