if ( s != null )
projection.setScaleFactor( Double.parseDouble( s ) );
s = (String)params.get( Proj4Keyword.units );
if ( s != null ) {
Unit unit = Units.findUnits( s );
// TODO: report unknown units name as error
if ( unit != null ) {
projection.setFromMetres( 1.0 / unit.value );
projection.setUnits( unit );
}