* or {@code true} for the valid area of target points.
*/
private GeographicBoundingBox getValidArea(final boolean target) {
GeneralEnvelope envelope = getEnvelope(target);
if (envelope != null) try {
return new GeographicBoundingBoxImpl(envelope);
} catch (TransformException exception) {
/*
* Can't transform the envelope. Do not rethrown this exception. We don't
* log it neither (at least not at the warning level) because this method
* is optional.