cdm/src/main/java/ucar/unidata/geoloc/projection/UtmProjection.java
@Override
  public ProjectionImpl constructCopy() {
    ProjectionImpl result = (saveParams == null) ? new UtmProjection(getZone(), isNorth()) : new UtmProjection(saveParams.a, saveParams.f, getZone(), isNorth());
    result.setDefaultMapArea(defaultMapArea);
    result.setName(name);
    return result;
  }
@Override
  public ProjectionImpl constructCopy() {
    ProjectionImpl result = (saveParams == null) ? new UtmProjection(getZone(), isNorth()) : new UtmProjection(saveParams.a, saveParams.f, getZone(), isNorth());
    result.setDefaultMapArea(defaultMapArea);
    result.setName(name);
    return result;
  }
needed for constructCopy