axis = a.getNumericValue().doubleValue();
if (null != (a = ctv.findAttribute( "inverse_flattening")))
f = a.getNumericValue().doubleValue();
// double a, double f, int zone, boolean isNorth
UtmProjection proj = (axis != 0.0) ? new UtmProjection(axis, f, zone, isNorth) : new UtmProjection(zone, isNorth);
return new ProjectionCT(ctv.getShortName(), "FGDC", proj);
}