if (nadgridsId.startsWith("@")) {
nadgridsId = nadgridsId.substring(1);
}
if ("null".equals(nadgridsId))
return new NullDatum(null, ellps);
NTV2GridShiftFileWrapper nadgrids = Projections.getNTV2Grid(nadgridsId);
if (nadgrids == null)
throw new ProjectionConfigurationException(tr("Grid shift file ''{0}'' for option +nadgrids not supported.", nadgridsId));
return new NTV2Datum(nadgridsId, null, ellps, nadgrids);
}