OGRLayer *GNMGenericNetwork::CopyLayer(OGRLayer *poSrcLayer,
const char *pszNewName, char **papszOptions)
{
if(CSLFindName(papszOptions, "DST_SRSWKT") == -1)
{
papszOptions = CSLAddNameValue(papszOptions, "DST_SRSWKT",
GetProjectionRef());
}
else
{
papszOptions = CSLSetNameValue(papszOptions, "DST_SRSWKT",
GetProjectionRef());
}
return GDALDataset::CopyLayer(poSrcLayer, pszNewName, papszOptions);
}
OGRLayer *GNMGenericNetwork::GetPath(GNMGFID nStartFID, GNMGFID nEndFID,
GNMGraphAlgorithmType eAlgorithm, char **papszOptions)
{
if(!m_bIsGraphLoaded && LoadGraph() != CE_None)
{
return NULL;
}
GDALDriver* poMEMDrv =
OGRSFDriverRegistrar::GetRegistrar()->GetDriverByName("Memory");
if (poMEMDrv == NULL)
{
CPLError(CE_Failure, CPLE_AppDefined, "Cannot load 'Memory' driver");
return NULL;
}
GDALDataset* poMEMDS =
poMEMDrv->Create("dummy_name", 0, 0, 0, GDT_Unknown, NULL);
OGRSpatialReference oDstSpaRef(GetProjectionRef());
OGRLayer* poMEMLayer = poMEMDS->CreateLayer(GetAlgorithmName(eAlgorithm,
true), &oDstSpaRef, wkbGeometryCollection, NULL);
OGRGNMWrappedResultLayer* poResLayer =
new OGRGNMWrappedResultLayer(poMEMDS, poMEMLayer);
const bool bReturnEdges = CPLFetchBool(papszOptions, GNM_MD_FETCHEDGES, true);
const bool bReturnVertices = CPLFetchBool(papszOptions, GNM_MD_FETCHVERTEX, true);
switch (eAlgorithm)
{
case GATDijkstraShortestPath:
{
GNMPATH path = m_oGraph.DijkstraShortestPath(nStartFID, nEndFID);
// fill features in result layer
FillResultLayer(poResLayer, path, 1, bReturnVertices, bReturnEdges);
}
break;
case GATKShortestPath:
{
int nK = atoi(CSLFetchNameValueDef(papszOptions, GNM_MD_NUM_PATHS,
"1"));
CPLDebug("GNM", "Search %d path(s)", nK);
std::vector<GNMPATH> paths = m_oGraph.KShortestPaths(nStartFID,
nEndFID, nK);
// fill features in result layer
for(size_t i = 0; i < paths.size(); ++i)
{
FillResultLayer(poResLayer, paths[i], static_cast<int>(i + 1), bReturnVertices,
bReturnEdges);
}
}
break;
case GATConnectedComponents:
{
GNMVECTOR anEmitters;
if(NULL != papszOptions)
{
char** papszEmitter = CSLFetchNameValueMultiple(papszOptions, GNM_MD_EMITTER);
for(int i = 0; papszEmitter[i] != NULL; ++i)
{
GNMGFID nEmitter = atol(papszEmitter[i]);
anEmitters.push_back(nEmitter);
}
CSLDestroy(papszEmitter);
}
if(nStartFID != -1)
{
anEmitters.push_back(nStartFID);
}
if(nStartFID != -1)
{
anEmitters.push_back(nEndFID);
}
GNMPATH path = m_oGraph.ConnectedComponents(anEmitters);
// fill features in result layer
FillResultLayer(poResLayer, path, 1, bReturnVertices, bReturnEdges);
}
break;
}
return poResLayer;
}
int Raster::Copy(const char * pOutputRaster,
double * dNewCellSize,
double fLeft, double fTop, int nRows, int nCols)
{
if (fLeft <=0)
return LEFT_ERROR;
if (fTop <=0)
return TOP_ERROR;
if (nRows <=0)
return ROWS_ERROR;
if (nCols <=0)
return COLS_ERROR;
// Open the original dataset
GDALDataset * pDSOld = (GDALDataset*) GDALOpen(m_sFilePath, GA_ReadOnly);
if (pDSOld == NULL)
return INPUT_FILE_ERROR;
GDALRasterBand * pRBInput = pDSOld->GetRasterBand(1);
/* Create the new dataset. Determine the driver from the output file extension.
* Enforce LZW compression for TIFs. The predictor 3 is used for floating point prediction.
* Not using this value defaults the LZW to prediction to 1 which causes striping.
*/
char **papszOptions = NULL;
GDALDriver * pDR = NULL;
std::string psDR = "";
const char * pSuffix = ExtractFileExt(pOutputRaster);
if (pSuffix == NULL)
return OUTPUT_FILE_EXT_ERROR;
else
{
if (strcmp(pSuffix, ".tif") == 0)
{
psDR = "GTiff";
pDR = GetGDALDriverManager()->GetDriverByName(psDR.c_str());
papszOptions = CSLSetNameValue(papszOptions, "COMPRESS", "LZW");
//papszOptions = CSLSetNameValue(papszOptions, "PREDICTOR", "3");
}
else if (strcmp(pSuffix, ".img") == 0){
psDR = "HFA";
pDR = GetGDALDriverManager()->GetDriverByName(psDR.c_str());
}
else
return OUTPUT_UNHANDLED_DRIVER;
}
double dNewCellHeight = (*dNewCellSize) * -1;
RasterMeta OutputMeta(fTop, fLeft, nRows, nCols, &dNewCellHeight,
dNewCellSize, GetNoDataValuePtr(), psDR.c_str(), GetGDALDataType(), GetProjectionRef() );
//const char * pC = pDR->GetDescription();
GDALDataset * pDSOutput = pDR->Create(pOutputRaster, nCols, nRows, 1, *GetGDALDataType(), papszOptions);
CSLDestroy( papszOptions );
if (pDSOutput == NULL)
return OUTPUT_FILE_ERROR;
if (HasNoDataValue())
{
CPLErr er = pDSOutput->GetRasterBand(1)->SetNoDataValue(GetNoDataValue());
if (er == CE_Failure || er == CE_Fatal)
return OUTPUT_NO_DATA_ERROR;
}
pDSOutput->SetGeoTransform(OutputMeta.GetGeoTransform());
pDSOutput->SetProjection(pDSOld->GetProjectionRef());
int nInputCols = pRBInput->GetXSize();
int nInputRows = pRBInput->GetYSize();
double * pInputLine = (double *) CPLMalloc(sizeof(double)*nInputCols);
double * pOutputLine = (double *) CPLMalloc(sizeof(double)*pDSOutput->GetRasterBand(1)->GetXSize());
int nRowTrans = GetRowTranslation(&OutputMeta);
int nColTrans = GetColTranslation(&OutputMeta);
/*
* Loop over the raster rows. Note that geographic coordinate origin is bottom left. But
* the GDAL image anchor is top left. The cell height is negative.
*
* The loop is over the centres of the output raster cells. Two rows are read from the
* input raster. The line just above the output cell and the line just below. The line
* just above is called the "anchor" row.
*/
int nOldRow, nOldCol;
int i, j;
for (i = 0; i < nRows; i++)
{
nOldRow = i - nRowTrans;
if (nOldRow >= 0 && nOldRow < nInputRows)
{
pRBInput->RasterIO(GF_Read, 0, nOldRow, nInputCols, 1, pInputLine, nInputCols, 1, GDT_Float64, 0, 0);
for (j = 0; j < nCols; j++)
{
nOldCol = j + nColTrans;
if (nOldCol >=0 && nOldCol < nInputCols)
{
pOutputLine[j] = pInputLine[nOldCol];
}
else
{
if (HasNoDataValue()) {
pOutputLine[j] = GetNoDataValue();
}
else
{
pOutputLine[j] = 0;
}
}
}
}
else
{
// Outside the bounds of the input image. Loop over all cells in current output row and set to NoData.
for (j = 0; j < nCols; j++)
{
pOutputLine[j] = GetNoDataValue();
}
}
pDSOutput->GetRasterBand(1)->RasterIO(GF_Write, 0, i,
pDSOutput->GetRasterBand(1)->GetXSize(), 1,
pOutputLine,
pDSOutput->GetRasterBand(1)->GetXSize(), 1,
GDT_Float64, 0, 0);
}
CPLFree(pInputLine);
CPLFree(pOutputLine);
CalculateStats(pDSOutput->GetRasterBand(1));
GDALClose(pDSOld);
GDALClose(pDSOutput);
GDALDumpOpenDatasets(stderr);
return PROCESS_OK;
}
/*
* Algorithm taken from: http://www.quantdec.com/SYSEN597/GTKAV/section9/map_algebra.htm
*
*/
int Raster::ReSample(const char * pOutputRaster, double fNewCellSize,
double fNewLeft, double fNewTop, int nNewRows, int nNewCols)
{
if (fNewCellSize <= 0)
return CELL_SIZE_ERROR;
if (fNewLeft <=0)
return LEFT_ERROR;
if (fNewTop <=0)
return TOP_ERROR;
if (nNewRows <=0)
return ROWS_ERROR;
if (nNewCols <=0)
return COLS_ERROR;
/*************************************************************************************************
* Open the original dataset and retrieve its basic properties
*/
GDALDataset * pDSOld = (GDALDataset*) GDALOpen(m_sFilePath, GA_ReadOnly);
if (pDSOld == NULL)
return INPUT_FILE_ERROR;
GDALRasterBand * pRBInput = pDSOld->GetRasterBand(1);
/*************************************************************************************************
* Create the new dataset. Determine the driver from the output file extension.
* Enforce LZW compression for TIFs. The predictor 3 is used for floating point prediction.
* Not using this value defaults the LZW to prediction to 1 which causes striping.
*/
char **papszOptions = NULL;
GDALDriver * pDR = NULL;
const char * pSuffix = ExtractFileExt(pOutputRaster);
if (pSuffix == NULL)
return OUTPUT_FILE_EXT_ERROR;
else
{
if (strcmp(pSuffix, ".tif") == 0)
{
pDR = GetGDALDriverManager()->GetDriverByName("GTiff");
papszOptions = CSLSetNameValue(papszOptions, "COMPRESS", "LZW");
//papszOptions = CSLSetNameValue(papszOptions, "PREDICTOR", "3");
}
else if (strcmp(pSuffix, ".img") == 0)
pDR = GetGDALDriverManager()->GetDriverByName("HFA");
else
return OUTPUT_UNHANDLED_DRIVER;
}
GDALDataset * pDSOutput = pDR->Create(pOutputRaster, nNewCols, nNewRows, 1, *GetGDALDataType(), papszOptions);
CSLDestroy( papszOptions );
if (pDSOutput == NULL)
return OUTPUT_FILE_ERROR;
GDALRasterBand * pRBOutput = pDSOutput->GetRasterBand(1);
if (HasNoDataValue())
{
CPLErr er = pRBOutput->SetNoDataValue(this->GetNoDataValue());
if (er == CE_Failure || er == CE_Fatal)
return OUTPUT_NO_DATA_ERROR;
}
double newTransform[6];
newTransform[0] = fNewLeft;
newTransform[1] = fNewCellSize;
newTransform[2] = 0;
newTransform[3] = fNewTop;
newTransform[4] = 0;
newTransform[5] = -1 * fNewCellSize;
pDSOutput->SetGeoTransform(newTransform);
pDSOutput->SetProjection(GetProjectionRef());
ReSampleRaster(pRBInput, pRBOutput, fNewCellSize, fNewLeft, fNewTop, nNewRows, nNewCols);
CalculateStats(pDSOutput->GetRasterBand(1));
GDALClose(pDSOld);
GDALClose(pDSOutput);
return PROCESS_OK;
}
CPLErr GDALPamDataset::CloneInfo( GDALDataset *poSrcDS, int nCloneFlags )
{
int bOnlyIfMissing = nCloneFlags & GCIF_ONLY_IF_MISSING;
int nSavedMOFlags = GetMOFlags();
PamInitialize();
/* -------------------------------------------------------------------- */
/* Supress NotImplemented error messages - mainly needed if PAM */
/* disabled. */
/* -------------------------------------------------------------------- */
SetMOFlags( nSavedMOFlags | GMO_IGNORE_UNIMPLEMENTED );
/* -------------------------------------------------------------------- */
/* GeoTransform */
/* -------------------------------------------------------------------- */
if( nCloneFlags & GCIF_GEOTRANSFORM )
{
double adfGeoTransform[6];
if( poSrcDS->GetGeoTransform( adfGeoTransform ) == CE_None )
{
double adfOldGT[6];
if( !bOnlyIfMissing || GetGeoTransform( adfOldGT ) != CE_None )
SetGeoTransform( adfGeoTransform );
}
}
/* -------------------------------------------------------------------- */
/* Projection */
/* -------------------------------------------------------------------- */
if( nCloneFlags & GCIF_PROJECTION )
{
const char *pszWKT = poSrcDS->GetProjectionRef();
if( pszWKT != NULL && strlen(pszWKT) > 0 )
{
if( !bOnlyIfMissing
|| GetProjectionRef() == NULL
|| strlen(GetProjectionRef()) == 0 )
SetProjection( pszWKT );
}
}
/* -------------------------------------------------------------------- */
/* GCPs */
/* -------------------------------------------------------------------- */
if( nCloneFlags & GCIF_GCPS )
{
if( poSrcDS->GetGCPCount() > 0 )
{
if( !bOnlyIfMissing || GetGCPCount() == 0 )
{
SetGCPs( poSrcDS->GetGCPCount(),
poSrcDS->GetGCPs(),
poSrcDS->GetGCPProjection() );
}
}
}
/* -------------------------------------------------------------------- */
/* Metadata */
/* -------------------------------------------------------------------- */
if( nCloneFlags & GCIF_METADATA )
{
if( poSrcDS->GetMetadata() != NULL )
{
if( !bOnlyIfMissing
|| CSLCount(GetMetadata()) != CSLCount(poSrcDS->GetMetadata()) )
{
SetMetadata( poSrcDS->GetMetadata() );
}
}
if( poSrcDS->GetMetadata("RPC") != NULL )
{
if( !bOnlyIfMissing
|| CSLCount(GetMetadata("RPC"))
!= CSLCount(poSrcDS->GetMetadata("RPC")) )
{
SetMetadata( poSrcDS->GetMetadata("RPC"), "RPC" );
}
}
}
/* -------------------------------------------------------------------- */
/* Process bands. */
/* -------------------------------------------------------------------- */
if( nCloneFlags & GCIF_PROCESS_BANDS )
{
int iBand;
for( iBand = 0; iBand < GetRasterCount(); iBand++ )
{
GDALPamRasterBand *poBand = (GDALPamRasterBand *)
GetRasterBand(iBand+1);
if( poBand == NULL || !(poBand->GetMOFlags() & GMO_PAM_CLASS) )
continue;
if( poSrcDS->GetRasterCount() >= iBand+1 )
poBand->CloneInfo( poSrcDS->GetRasterBand(iBand+1),
nCloneFlags );
else
CPLDebug( "GDALPamDataset", "Skipping CloneInfo for band not in source, this is a bit unusual!" );
}
}
/* -------------------------------------------------------------------- */
/* Copy masks. These are really copied at a lower level using */
/* GDALDefaultOverviews, for formats with no native mask */
/* support but this is a convenient central point to put this */
/* for most drivers. */
/* -------------------------------------------------------------------- */
if( nCloneFlags & GCIF_MASK )
{
GDALDriver::DefaultCopyMasks( poSrcDS, this, FALSE );
}
/* -------------------------------------------------------------------- */
/* Restore MO flags. */
/* -------------------------------------------------------------------- */
SetMOFlags( nSavedMOFlags );
return CE_None;
}
