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/******************************************************************************
*
* Project: GDAL
* Purpose: "reproject" step of "vector pipeline"
* Author: Even Rouault <even dot rouault at spatialys.com>
*
******************************************************************************
* Copyright (c) 2024, Even Rouault <even dot rouault at spatialys.com>
*
* SPDX-License-Identifier: MIT
****************************************************************************/
#include "gdalalg_vector_reproject.h"
#include "gdal_priv.h"
#include "ogr_spatialref.h"
#include "ogrsf_frmts.h"
#include "ogrwarpedlayer.h"
//! @cond Doxygen_Suppress
#ifndef _
#define _(x) (x)
#endif
/************************************************************************/
/* GDALVectorReprojectAlgorithm::GDALVectorReprojectAlgorithm() */
/************************************************************************/
GDALVectorReprojectAlgorithm::GDALVectorReprojectAlgorithm(bool standaloneStep)
: GDALVectorPipelineStepAlgorithm(NAME, DESCRIPTION, HELP_URL,
standaloneStep)
{
AddActiveLayerArg(&m_activeLayer);
AddArg("src-crs", 's', _("Source CRS"), &m_srsCrs)
.SetIsCRSArg()
.AddHiddenAlias("s_srs");
AddArg("dst-crs", 'd', _("Destination CRS"), &m_dstCrs)
.SetIsCRSArg()
.SetRequired()
.AddHiddenAlias("t_srs");
}
/************************************************************************/
/* GDALVectorReprojectAlgorithm::RunStep() */
/************************************************************************/
bool GDALVectorReprojectAlgorithm::RunStep(GDALPipelineStepRunContext &)
{
auto poSrcDS = m_inputDataset[0].GetDatasetRef();
CPLAssert(poSrcDS);
CPLAssert(m_outputDataset.GetName().empty());
CPLAssert(!m_outputDataset.GetDatasetRef());
std::unique_ptr<OGRSpatialReference> poSrcCRS;
if (!m_srsCrs.empty())
{
poSrcCRS = std::make_unique<OGRSpatialReference>();
poSrcCRS->SetFromUserInput(m_srsCrs.c_str());
poSrcCRS->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
}
OGRSpatialReference oDstCRS;
oDstCRS.SetFromUserInput(m_dstCrs.c_str());
oDstCRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
auto reprojectedDataset =
std::make_unique<GDALVectorPipelineOutputDataset>(*poSrcDS);
const int nLayerCount = poSrcDS->GetLayerCount();
bool ret = true;
for (int i = 0; ret && i < nLayerCount; ++i)
{
auto poSrcLayer = poSrcDS->GetLayer(i);
ret = (poSrcLayer != nullptr);
if (ret)
{
if (m_activeLayer.empty() ||
m_activeLayer == poSrcLayer->GetDescription())
{
const OGRSpatialReference *poSrcLayerCRS;
if (poSrcCRS)
poSrcLayerCRS = poSrcCRS.get();
else
poSrcLayerCRS = poSrcLayer->GetSpatialRef();
if (!poSrcLayerCRS)
{
ReportError(CE_Failure, CPLE_AppDefined,
"Layer '%s' has no spatial reference system",
poSrcLayer->GetName());
return false;
}
auto poCT = std::unique_ptr<OGRCoordinateTransformation>(
OGRCreateCoordinateTransformation(poSrcLayerCRS, &oDstCRS));
auto poReversedCT =
std::unique_ptr<OGRCoordinateTransformation>(
OGRCreateCoordinateTransformation(&oDstCRS,
poSrcLayerCRS));
ret = (poCT != nullptr) && (poReversedCT != nullptr);
if (ret)
{
reprojectedDataset->AddLayer(
*poSrcLayer,
std::make_unique<OGRWarpedLayer>(
poSrcLayer, /* iGeomField = */ 0,
/*bTakeOwnership = */ false, poCT.release(),
poReversedCT.release()));
}
}
else
{
reprojectedDataset->AddLayer(
*poSrcLayer,
std::make_unique<GDALVectorPipelinePassthroughLayer>(
*poSrcLayer));
}
}
}
if (ret)
m_outputDataset.Set(std::move(reprojectedDataset));
return ret;
}
GDALVectorReprojectAlgorithmStandalone::
~GDALVectorReprojectAlgorithmStandalone() = default;
//! @endcond
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