//*************************************************************************************************
//! Creates given an EPSG spec in the form "EPSG:<datum_code>".
//*************************************************************************************************
const ossimDatum* ossimEpsgDatumFactory::create(ossim_uint32 gcs_code) const
{
// Find the datum code in the map in order to determine the corresponding OSSIM/Geotrans alpha
// code. Then use the datum factory to create the datum.
ossimString alphaCode = findAlphaCode(gcs_code);
if (!alphaCode.empty())
return ossimDatumFactory::instance()->create(alphaCode);
return 0;
}
//*************************************************************************************************
//! Creates given an EPSG spec in the form "EPSG:<datum_code>".
//*************************************************************************************************
const ossimDatum* ossimEpsgDatumFactory::create(ossim_uint32 datum_code) const
{
// Geographic coordinate system codes (4XXX) are sometimes used in place of their corresponding
// datum code (6XXX). Check for this possibility and transpose the code if so:
if ((datum_code >= 4135) && (datum_code <= 4807))
datum_code += 2000;
// Find the datum code in the map in order to determine the corresponding OSSIM/Geotrans alpha
// code. Then use the datum factory to create the datum.
ossimString alphaCode = findAlphaCode(datum_code);
if (!alphaCode.empty())
return ossimDatumFactory::instance()->create(alphaCode);
return 0;
}