CoordinateAxis1D xaxis = (CoordinateAxis1D) gsys.getXHorizAxis();
CoordinateAxis1D yaxis = (CoordinateAxis1D) gsys.getYHorizAxis();
p.projToLatLon(xaxis.getCoordValue(0), yaxis.getCoordValue(0) );
LatLonPointImpl start1 = p.projToLatLon(xaxis.getCoordValue(0), yaxis.getCoordValue(0));
LatLonPointImpl start2 = p.projToLatLon(xaxis.getCoordValue((int)xaxis.getSize()-1), yaxis.getCoordValue((int)yaxis.getSize()-1));
System.out.printf( "start = %f %f%n", start1.getLatitude(), start1.getLongitude());
System.out.printf( "end = %f %f%n", start2.getLatitude(), start2.getLongitude());
/*
wgrib2 /data/laps/lapsprd/gr2/102711000.gr2 -ijlat 358 353 -d 1