void IDADataset::ProcessGeoref()
{
OGRSpatialReference oSRS;
if( nProjection == 3 )
{
oSRS.SetWellKnownGeogCS( "WGS84" );
}
else if( nProjection == 4 )
{
oSRS.SetLCC( dfParallel1, dfParallel2,
dfLatCenter, dfLongCenter,
0.0, 0.0 );
oSRS.SetGeogCS( "Clarke 1866", "Clarke 1866", "Clarke 1866",
6378206.4, 293.97869821389662 );
}
else if( nProjection == 6 )
{
oSRS.SetLAEA( dfLatCenter, dfLongCenter, 0.0, 0.0 );
oSRS.SetGeogCS( "Sphere", "Sphere", "Sphere",
6370997.0, 0.0 );
}
else if( nProjection == 8 )
{
oSRS.SetACEA( dfParallel1, dfParallel2,
dfLatCenter, dfLongCenter,
0.0, 0.0 );
oSRS.SetGeogCS( "Clarke 1866", "Clarke 1866", "Clarke 1866",
6378206.4, 293.97869821389662 );
}
else if( nProjection == 9 )
{
oSRS.SetGH( dfLongCenter, 0.0, 0.0 );
oSRS.SetGeogCS( "Sphere", "Sphere", "Sphere",
6370997.0, 0.0 );
}
if( oSRS.GetRoot() != NULL )
{
CPLFree( pszProjection );
pszProjection = NULL;
oSRS.exportToWkt( &pszProjection );
}
adfGeoTransform[0] = 0 - dfDX * dfXCenter;
adfGeoTransform[1] = dfDX;
adfGeoTransform[2] = 0.0;
adfGeoTransform[3] = dfDY * dfYCenter;
adfGeoTransform[4] = 0.0;
adfGeoTransform[5] = -dfDY;
if( nProjection == 3 )
{
adfGeoTransform[0] += dfLongCenter;
adfGeoTransform[3] += dfLatCenter;
}
}
OGRSpatialReference *OGROCIDataSource::FetchSRS( int nId )
{
if( nId < 0 )
return NULL;
/* -------------------------------------------------------------------- */
/* First, we look through our SRID cache, is it there? */
/* -------------------------------------------------------------------- */
int i;
for( i = 0; i < nKnownSRID; i++ )
{
if( panSRID[i] == nId )
return papoSRS[i];
}
/* -------------------------------------------------------------------- */
/* Try looking up in MDSYS.CS_SRS table. */
/* -------------------------------------------------------------------- */
OGROCIStatement oStatement( GetSession() );
char szSelect[200], **papszResult;
snprintf( szSelect, sizeof(szSelect),
"SELECT WKTEXT, AUTH_SRID, AUTH_NAME FROM MDSYS.CS_SRS "
"WHERE SRID = %d AND WKTEXT IS NOT NULL", nId );
if( oStatement.Execute( szSelect ) != CE_None )
return NULL;
papszResult = oStatement.SimpleFetchRow();
if( CSLCount(papszResult) < 1 )
return NULL;
/* -------------------------------------------------------------------- */
/* Turn into a spatial reference. */
/* -------------------------------------------------------------------- */
char *pszWKT = papszResult[0];
OGRSpatialReference *poSRS = NULL;
poSRS = new OGRSpatialReference();
if( poSRS->importFromWkt( &pszWKT ) != OGRERR_NONE )
{
delete poSRS;
poSRS = NULL;
}
/* -------------------------------------------------------------------- */
/* If we have a corresponding EPSG code for this SRID, use that */
/* authority. */
/* -------------------------------------------------------------------- */
int bGotEPSGMapping = FALSE;
for( i = 0; anEPSGOracleMapping[i] != 0; i += 2 )
{
if( anEPSGOracleMapping[i] == nId )
{
poSRS->SetAuthority( poSRS->GetRoot()->GetValue(), "EPSG",
anEPSGOracleMapping[i+1] );
bGotEPSGMapping = TRUE;
break;
}
}
/* -------------------------------------------------------------------- */
/* Insert authority information, if it is available. */
/* -------------------------------------------------------------------- */
if( papszResult[1] != NULL && atoi(papszResult[1]) != 0
&& papszResult[2] != NULL && strlen(papszResult[1]) != 0
&& poSRS->GetRoot() != NULL
&& !bGotEPSGMapping )
{
poSRS->SetAuthority( poSRS->GetRoot()->GetValue(),
papszResult[2], atoi(papszResult[1]) );
}
/* -------------------------------------------------------------------- */
/* Add to the cache. */
/* -------------------------------------------------------------------- */
panSRID = (int *) CPLRealloc(panSRID,sizeof(int) * (nKnownSRID+1) );
papoSRS = (OGRSpatialReference **)
CPLRealloc(papoSRS, sizeof(void*) * (nKnownSRID + 1) );
panSRID[nKnownSRID] = nId;
papoSRS[nKnownSRID] = poSRS;
nKnownSRID++;
return poSRS;
}
GDALDataset *BTDataset::Open( GDALOpenInfo * poOpenInfo )
{
/* -------------------------------------------------------------------- */
/* Verify that this is some form of binterr file. */
/* -------------------------------------------------------------------- */
if( poOpenInfo->nHeaderBytes < 256)
return NULL;
if( !STARTS_WITH((const char *) poOpenInfo->pabyHeader, "binterr") )
return NULL;
/* -------------------------------------------------------------------- */
/* Create the dataset. */
/* -------------------------------------------------------------------- */
BTDataset *poDS = new BTDataset();
memcpy( poDS->abyHeader, poOpenInfo->pabyHeader, 256 );
/* -------------------------------------------------------------------- */
/* Get the version. */
/* -------------------------------------------------------------------- */
char szVersion[4] = {};
strncpy( szVersion, (char *) (poDS->abyHeader + 7), 3 );
szVersion[3] = '\0';
poDS->nVersionCode = static_cast<int>(CPLAtof(szVersion) * 10);
/* -------------------------------------------------------------------- */
/* Extract core header information, being careful about the */
/* version. */
/* -------------------------------------------------------------------- */
GInt32 nIntTemp = 0;
memcpy( &nIntTemp, poDS->abyHeader + 10, 4 );
poDS->nRasterXSize = CPL_LSBWORD32( nIntTemp );
memcpy( &nIntTemp, poDS->abyHeader + 14, 4 );
poDS->nRasterYSize = CPL_LSBWORD32( nIntTemp );
if( !GDALCheckDatasetDimensions(poDS->nRasterXSize, poDS->nRasterYSize) )
{
delete poDS;
return NULL;
}
GInt16 nDataSize = 0;
memcpy( &nDataSize, poDS->abyHeader+18, 2 );
nDataSize = CPL_LSBWORD16( nDataSize );
GDALDataType eType = GDT_Unknown;
if( poDS->abyHeader[20] != 0 && nDataSize == 4 )
eType = GDT_Float32;
else if( poDS->abyHeader[20] == 0 && nDataSize == 4 )
eType = GDT_Int32;
else if( poDS->abyHeader[20] == 0 && nDataSize == 2 )
eType = GDT_Int16;
else
{
CPLError( CE_Failure, CPLE_AppDefined,
".bt file data type unknown, got datasize=%d.",
nDataSize );
delete poDS;
return NULL;
}
/*
rcg, apr 7/06: read offset 62 for vert. units.
If zero, assume 1.0 as per spec.
*/
memcpy( &poDS->m_fVscale, poDS->abyHeader + 62, 4 );
CPL_LSBPTR32(&poDS->m_fVscale);
if(poDS->m_fVscale == 0.0f)
poDS->m_fVscale = 1.0f;
/* -------------------------------------------------------------------- */
/* Try to read a .prj file if it is indicated. */
/* -------------------------------------------------------------------- */
OGRSpatialReference oSRS;
if( poDS->nVersionCode >= 12 && poDS->abyHeader[60] != 0 )
{
const char *pszPrjFile = CPLResetExtension( poOpenInfo->pszFilename,
"prj" );
VSILFILE *fp = VSIFOpenL( pszPrjFile, "rt" );
if( fp != NULL )
{
const int nBufMax = 10000;
char *pszBuffer = static_cast<char *>(CPLMalloc(nBufMax));
const int nBytes =
static_cast<int>(VSIFReadL( pszBuffer, 1, nBufMax-1, fp ));
CPL_IGNORE_RET_VAL(VSIFCloseL( fp ));
pszBuffer[nBytes] = '\0';
char *pszBufPtr = pszBuffer;
if( oSRS.importFromWkt( &pszBufPtr ) != OGRERR_NONE )
{
CPLError( CE_Warning, CPLE_AppDefined,
"Unable to parse .prj file, "
"coordinate system missing." );
}
CPLFree( pszBuffer );
}
}
/* -------------------------------------------------------------------- */
/* If we didn't find a .prj file, try to use internal info. */
/* -------------------------------------------------------------------- */
if( oSRS.GetRoot() == NULL )
{
GInt16 nUTMZone = 0;
memcpy( &nUTMZone, poDS->abyHeader + 24, 2 );
nUTMZone = CPL_LSBWORD16( nUTMZone );
GInt16 nDatum = 0;
memcpy( &nDatum, poDS->abyHeader + 26, 2 );
nDatum = CPL_LSBWORD16( nDatum );
GInt16 nHUnits = 0;
memcpy( &nHUnits, poDS->abyHeader + 22, 2 );
nHUnits = CPL_LSBWORD16( nHUnits );
if( nUTMZone != 0 )
oSRS.SetUTM( std::abs(static_cast<int>(nUTMZone)), nUTMZone > 0 );
else if( nHUnits != 0 )
oSRS.SetLocalCS( "Unknown" );
if( nHUnits == 1 )
oSRS.SetLinearUnits( SRS_UL_METER, 1.0 );
else if( nHUnits == 2 )
oSRS.SetLinearUnits( SRS_UL_FOOT, CPLAtof(SRS_UL_FOOT_CONV) );
else if( nHUnits == 3 )
oSRS.SetLinearUnits( SRS_UL_US_FOOT, CPLAtof(SRS_UL_US_FOOT_CONV) );
// Translate some of the more obvious old USGS datum codes
if( nDatum == 0 )
nDatum = 6201;
else if( nDatum == 1 )
nDatum = 6209;
else if( nDatum == 2 )
nDatum = 6210;
else if( nDatum == 3 )
nDatum = 6202;
else if( nDatum == 4 )
nDatum = 6203;
else if( nDatum == 6 )
nDatum = 6222;
else if( nDatum == 7 )
nDatum = 6230;
else if( nDatum == 13 )
nDatum = 6267;
else if( nDatum == 14 )
nDatum = 6269;
else if( nDatum == 17 )
nDatum = 6277;
else if( nDatum == 19 )
nDatum = 6284;
else if( nDatum == 21 )
nDatum = 6301;
else if( nDatum == 22 )
nDatum = 6322;
else if( nDatum == 23 )
nDatum = 6326;
if( !oSRS.IsLocal() )
{
if( nDatum >= 6000 )
{
char szName[32];
snprintf( szName, sizeof(szName), "EPSG:%d", nDatum-2000 );
oSRS.SetWellKnownGeogCS( szName );
}
else
oSRS.SetWellKnownGeogCS( "WGS84" );
}
}
/* -------------------------------------------------------------------- */
/* Convert coordinate system back to WKT. */
/* -------------------------------------------------------------------- */
if( oSRS.GetRoot() != NULL )
oSRS.exportToWkt( &poDS->pszProjection );
/* -------------------------------------------------------------------- */
/* Get georeferencing bounds. */
/* -------------------------------------------------------------------- */
if( poDS->nVersionCode >= 11 )
{
double dfLeft = 0.0;
memcpy( &dfLeft, poDS->abyHeader + 28, 8 );
CPL_LSBPTR64( &dfLeft );
double dfRight = 0.0;
memcpy( &dfRight, poDS->abyHeader + 36, 8 );
CPL_LSBPTR64( &dfRight );
double dfBottom = 0.0;
memcpy( &dfBottom, poDS->abyHeader + 44, 8 );
CPL_LSBPTR64( &dfBottom );
double dfTop = 0.0;
memcpy( &dfTop, poDS->abyHeader + 52, 8 );
CPL_LSBPTR64( &dfTop );
poDS->adfGeoTransform[0] = dfLeft;
poDS->adfGeoTransform[1] = (dfRight - dfLeft) / poDS->nRasterXSize;
poDS->adfGeoTransform[2] = 0.0;
poDS->adfGeoTransform[3] = dfTop;
poDS->adfGeoTransform[4] = 0.0;
poDS->adfGeoTransform[5] = (dfBottom - dfTop) / poDS->nRasterYSize;
poDS->bGeoTransformValid = TRUE;
}
/* -------------------------------------------------------------------- */
/* Re-open the file with the desired access. */
/* -------------------------------------------------------------------- */
if( poOpenInfo->eAccess == GA_Update )
poDS->fpImage = VSIFOpenL( poOpenInfo->pszFilename, "rb+" );
else
poDS->fpImage = VSIFOpenL( poOpenInfo->pszFilename, "rb" );
if( poDS->fpImage == NULL )
{
CPLError( CE_Failure, CPLE_OpenFailed,
"Failed to re-open %s within BT driver.\n",
poOpenInfo->pszFilename );
delete poDS;
return NULL;
}
poDS->eAccess = poOpenInfo->eAccess;
/* -------------------------------------------------------------------- */
/* Create band information objects */
/* -------------------------------------------------------------------- */
poDS->SetBand( 1, new BTRasterBand( poDS, poDS->fpImage, eType ) );
#ifdef notdef
poDS->bGeoTransformValid =
GDALReadWorldFile( poOpenInfo->pszFilename, ".wld",
poDS->adfGeoTransform );
#endif
/* -------------------------------------------------------------------- */
/* Initialize any PAM information. */
/* -------------------------------------------------------------------- */
poDS->SetDescription( poOpenInfo->pszFilename );
poDS->TryLoadXML();
/* -------------------------------------------------------------------- */
/* Check for overviews. */
/* -------------------------------------------------------------------- */
poDS->oOvManager.Initialize( poDS, poOpenInfo->pszFilename );
return poDS;
}
GDALDataset *NDFDataset::Open( GDALOpenInfo * poOpenInfo )
{
/* -------------------------------------------------------------------- */
/* The user must select the header file (ie. .H1). */
/* -------------------------------------------------------------------- */
if( poOpenInfo->nHeaderBytes < 50 )
return NULL;
if( !EQUALN((const char *)poOpenInfo->pabyHeader,"NDF_REVISION=2",14)
&& !EQUALN((const char *)poOpenInfo->pabyHeader,"NDF_REVISION=0",14) )
return NULL;
/* -------------------------------------------------------------------- */
/* Read and process the header into a local name/value */
/* stringlist. We just take off the trailing semicolon. The */
/* keyword is already seperated from the value by an equal */
/* sign. */
/* -------------------------------------------------------------------- */
VSILFILE* fp = VSIFOpenL(poOpenInfo->pszFilename, "rb");
if (fp == NULL)
return NULL;
const char *pszLine;
const int nHeaderMax = 1000;
int nHeaderLines = 0;
char **papszHeader = (char **) CPLMalloc(sizeof(char *) * (nHeaderMax+1));
while( nHeaderLines < nHeaderMax
&& (pszLine = CPLReadLineL( fp )) != NULL
&& !EQUAL(pszLine,"END_OF_HDR;") )
{
char *pszFixed;
if( strstr(pszLine,"=") == NULL )
break;
pszFixed = CPLStrdup( pszLine );
if( pszFixed[strlen(pszFixed)-1] == ';' )
pszFixed[strlen(pszFixed)-1] = '\0';
papszHeader[nHeaderLines++] = pszFixed;
papszHeader[nHeaderLines] = NULL;
}
VSIFCloseL(fp);
fp = NULL;
if( CSLFetchNameValue( papszHeader, "PIXELS_PER_LINE" ) == NULL
|| CSLFetchNameValue( papszHeader, "LINES_PER_DATA_FILE" ) == NULL
|| CSLFetchNameValue( papszHeader, "BITS_PER_PIXEL" ) == NULL
|| CSLFetchNameValue( papszHeader, "PIXEL_FORMAT" ) == NULL )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Dataset appears to be NDF but is missing a required field.");
CSLDestroy( papszHeader );
return NULL;
}
if( !EQUAL(CSLFetchNameValue( papszHeader, "PIXEL_FORMAT"),
"BYTE" )
|| !EQUAL(CSLFetchNameValue( papszHeader, "BITS_PER_PIXEL"),"8") )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Currently NDF driver supports only 8bit BYTE format." );
CSLDestroy( papszHeader );
return NULL;
}
/* -------------------------------------------------------------------- */
/* Confirm the requested access is supported. */
/* -------------------------------------------------------------------- */
if( poOpenInfo->eAccess == GA_Update )
{
CSLDestroy( papszHeader );
CPLError( CE_Failure, CPLE_NotSupported,
"The NDF driver does not support update access to existing"
" datasets.\n" );
return NULL;
}
/* -------------------------------------------------------------------- */
/* Create a corresponding GDALDataset. */
/* -------------------------------------------------------------------- */
NDFDataset *poDS;
poDS = new NDFDataset();
poDS->papszHeader = papszHeader;
poDS->nRasterXSize = atoi(poDS->Get("PIXELS_PER_LINE",""));
poDS->nRasterYSize = atoi(poDS->Get("LINES_PER_DATA_FILE",""));
/* -------------------------------------------------------------------- */
/* Create a raw raster band for each file. */
/* -------------------------------------------------------------------- */
int iBand;
const char* pszBand = CSLFetchNameValue(papszHeader,
"NUMBER_OF_BANDS_IN_VOLUME");
if (pszBand == NULL)
{
CPLError(CE_Failure, CPLE_AppDefined, "Cannot find band count");
delete poDS;
return NULL;
}
int nBands = atoi(pszBand);
if (!GDALCheckDatasetDimensions(poDS->nRasterXSize, poDS->nRasterYSize) ||
!GDALCheckBandCount(nBands, FALSE))
{
delete poDS;
return NULL;
}
for( iBand = 0; iBand < nBands; iBand++ )
{
char szKey[100];
CPLString osFilename;
sprintf( szKey, "BAND%d_FILENAME", iBand+1 );
osFilename = poDS->Get(szKey,"");
// NDF1 file do not include the band filenames.
if( osFilename.size() == 0 )
{
char szBandExtension[15];
sprintf( szBandExtension, "I%d", iBand+1 );
osFilename = CPLResetExtension( poOpenInfo->pszFilename,
szBandExtension );
}
else
{
CPLString osBasePath = CPLGetPath(poOpenInfo->pszFilename);
osFilename = CPLFormFilename( osBasePath, osFilename, NULL);
}
VSILFILE *fpRaw = VSIFOpenL( osFilename, "rb" );
if( fpRaw == NULL )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to open band file: %s",
osFilename.c_str() );
delete poDS;
return NULL;
}
poDS->papszExtraFiles =
CSLAddString( poDS->papszExtraFiles,
osFilename );
RawRasterBand *poBand =
new RawRasterBand( poDS, iBand+1, fpRaw, 0, 1, poDS->nRasterXSize,
GDT_Byte, TRUE, TRUE );
sprintf( szKey, "BAND%d_NAME", iBand+1 );
poBand->SetDescription( poDS->Get(szKey, "") );
sprintf( szKey, "BAND%d_WAVELENGTHS", iBand+1 );
poBand->SetMetadataItem( "WAVELENGTHS", poDS->Get(szKey,"") );
sprintf( szKey, "BAND%d_RADIOMETRIC_GAINS/BIAS", iBand+1 );
poBand->SetMetadataItem( "RADIOMETRIC_GAINS_BIAS",
poDS->Get(szKey,"") );
poDS->SetBand( iBand+1, poBand );
}
/* -------------------------------------------------------------------- */
/* Fetch and parse USGS projection parameters. */
/* -------------------------------------------------------------------- */
double adfUSGSParms[15] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
char **papszParmTokens =
CSLTokenizeStringComplex( poDS->Get( "USGS_PROJECTION_NUMBER", "" ),
",", FALSE, TRUE );
if( CSLCount( papszParmTokens ) >= 15 )
{
int i;
for( i = 0; i < 15; i++ )
adfUSGSParms[i] = CPLAtof(papszParmTokens[i]);
}
CSLDestroy(papszParmTokens);
papszParmTokens = NULL;
/* -------------------------------------------------------------------- */
/* Minimal georef support ... should add full USGS style */
/* support at some point. */
/* -------------------------------------------------------------------- */
OGRSpatialReference oSRS;
int nUSGSProjection = atoi(poDS->Get( "USGS_PROJECTION_NUMBER", "" ));
int nZone = atoi(poDS->Get("USGS_MAP_ZONE","0"));
oSRS.importFromUSGS( nUSGSProjection, nZone, adfUSGSParms, 12 );
CPLString osDatum = poDS->Get( "HORIZONTAL_DATUM", "" );
if( EQUAL(osDatum,"WGS84") || EQUAL(osDatum,"NAD83")
|| EQUAL(osDatum,"NAD27") )
{
oSRS.SetWellKnownGeogCS( osDatum );
}
else if( EQUALN(osDatum,"NAD27",5) )
{
oSRS.SetWellKnownGeogCS( "NAD27" );
}
else
{
CPLError( CE_Warning, CPLE_AppDefined,
"Unrecognised datum name in NLAPS/NDF file:%s, assuming WGS84.",
osDatum.c_str() );
oSRS.SetWellKnownGeogCS( "WGS84" );
}
if( oSRS.GetRoot() != NULL )
{
CPLFree( poDS->pszProjection );
poDS->pszProjection = NULL;
oSRS.exportToWkt( &(poDS->pszProjection) );
}
/* -------------------------------------------------------------------- */
/* Get geotransform. */
/* -------------------------------------------------------------------- */
char **papszUL = CSLTokenizeString2(
poDS->Get("UPPER_LEFT_CORNER",""), ",", 0 );
char **papszUR = CSLTokenizeString2(
poDS->Get("UPPER_RIGHT_CORNER",""), ",", 0 );
char **papszLL = CSLTokenizeString2(
poDS->Get("LOWER_LEFT_CORNER",""), ",", 0 );
if( CSLCount(papszUL) == 4
&& CSLCount(papszUR) == 4
&& CSLCount(papszLL) == 4 )
{
poDS->adfGeoTransform[0] = CPLAtof(papszUL[2]);
poDS->adfGeoTransform[1] =
(CPLAtof(papszUR[2]) - CPLAtof(papszUL[2])) / (poDS->nRasterXSize-1);
poDS->adfGeoTransform[2] =
(CPLAtof(papszUR[3]) - CPLAtof(papszUL[3])) / (poDS->nRasterXSize-1);
poDS->adfGeoTransform[3] = CPLAtof(papszUL[3]);
poDS->adfGeoTransform[4] =
(CPLAtof(papszLL[2]) - CPLAtof(papszUL[2])) / (poDS->nRasterYSize-1);
poDS->adfGeoTransform[5] =
(CPLAtof(papszLL[3]) - CPLAtof(papszUL[3])) / (poDS->nRasterYSize-1);
// Move origin up-left half a pixel.
poDS->adfGeoTransform[0] -= poDS->adfGeoTransform[1] * 0.5;
poDS->adfGeoTransform[0] -= poDS->adfGeoTransform[4] * 0.5;
poDS->adfGeoTransform[3] -= poDS->adfGeoTransform[2] * 0.5;
poDS->adfGeoTransform[3] -= poDS->adfGeoTransform[5] * 0.5;
}
CSLDestroy( papszUL );
CSLDestroy( papszLL );
CSLDestroy( papszUR );
/* -------------------------------------------------------------------- */
/* Initialize any PAM information. */
/* -------------------------------------------------------------------- */
poDS->SetDescription( poOpenInfo->pszFilename );
poDS->TryLoadXML();
/* -------------------------------------------------------------------- */
/* Check for overviews. */
/* -------------------------------------------------------------------- */
poDS->oOvManager.Initialize( poDS, poOpenInfo->pszFilename );
return( poDS );
}
void BExtractorDoc::OnImportimage2(LPCTSTR szPathName)
{
VTLOG("OnImportimage2 %s\n", szPathName);
m_picLoaded = false;
m_pImage = new CBImage;
if (1)
{
CProgressDlg prog(CG_IDS_PROGRESS_CAPTION3);
prog.Create(NULL); // top level
CDC *pDC = GetView()->GetDC();
bool success = m_pImage->LoadFromFile(szPathName, pDC, m_hdd);
GetView()->ReleaseDC(pDC);
if (!success)
{
VTLOG("LoadFromFile failed\n");
return;
}
}
// we don't know projection unless we have read a geotiff
OGRSpatialReference *srs = m_pImage->m_pSpatialReference;
if (srs == NULL || (srs != NULL && srs->GetRoot() == NULL))
{
VTLOG("no SRS, opening Projection dialog.\n");
// Assume that I have loaded from a world file
// and need some more info
// get utm zone from a dialog
CProjectionDlg dlg;
dlg.m_iZone = 1;
if (dlg.DoModal() != IDOK)
return;
m_proj.SetWellKnownGeogCS( "WGS84" );
switch (dlg.m_iProjection)
{
case 0: // UTM
m_proj.SetUTMZone(dlg.m_iZone);
m_Buildings.m_proj.SetUTMZone(dlg.m_iZone);
m_Links.GetProjection().SetUTMZone(dlg.m_iZone);
break;
case 1: // OSGB
m_proj.SetProjectionSimple(false, -1, 6277); // OSGB 1936
m_Buildings.m_proj.SetProjectionSimple(false, -1, 6277);
m_Links.GetProjection().SetProjectionSimple(false, -1, 6277);
break;
default: // default to UTM
m_proj.SetUTMZone(dlg.m_iZone);
m_Buildings.m_proj.SetUTMZone(dlg.m_iZone);
m_Links.GetProjection().SetUTMZone(dlg.m_iZone);
break;
}
}
else
{
// Loaded from a GDAL dataset (Geotiff etc.)
// I should have a valid projection
m_proj.SetSpatialReference(m_pImage->m_pSpatialReference);
m_Buildings.m_proj.SetSpatialReference(m_pImage->m_pSpatialReference);
m_Links.GetProjection().SetSpatialReference(m_pImage->m_pSpatialReference);
}
// is image >50 million pixels?
if (m_pImage->m_PixelSize.x * m_pImage->m_PixelSize.y > 45000000)
{
CString str;
str.Format("Warning! That image is really large (%d * %d)\n"
"You can save memory by disabling color display.\n"
"Do you want to do this?",
m_pImage->m_PixelSize.x, m_pImage->m_PixelSize.y);
int result = AfxMessageBox(str, MB_YESNO);
if (result == IDYES)
{
if (NULL != m_pImage->m_pSourceDIB)
{
delete m_pImage->m_pSourceDIB;
m_pImage->m_pSourceDIB = NULL;
}
}
}
m_picLoaded = true;
// Tell the view to zoom to the freshly loaded bitmap
m_Buildings.Empty(); //clear out any old buildings we have lying around
m_Links.DeleteElements();
GetView()->ZoomToImage(m_pImage);
VTLOG("OnImportimage2 finished\n");
}
/** Apply a vertical shift grid to a source (DEM typically) dataset.
*
* hGridDataset will typically use WGS84 as horizontal datum (but this is
* not a requirement) and its values are the values to add to go from geoid
* elevations to WGS84 ellipsoidal heights.
*
* hGridDataset will be on-the-fly reprojected and resampled to the projection
* and resolution of hSrcDataset, using bilinear resampling by default.
*
* Both hSrcDataset and hGridDataset must be single band datasets, and have
* a valid geotransform and projection.
*
* On success, a reference will be taken on hSrcDataset and hGridDataset.
* Reference counting semantics on the source and grid datasets should be
* honoured. That is, don't just GDALClose() it, unless it was opened with
* GDALOpenShared(), but rather use GDALReleaseDataset() if wanting to
* immediately release the reference(s) and make the returned dataset the
* owner of them.
*
* Valid use cases:
*
* \code
* hSrcDataset = GDALOpen(...)
* hGridDataset = GDALOpen(...)
* hDstDataset = GDALApplyVerticalShiftGrid(hSrcDataset, hGridDataset, ...)
* GDALReleaseDataset(hSrcDataset);
* GDALReleaseDataset(hGridDataset);
* if( hDstDataset )
* {
* // Do things with hDstDataset
* GDALClose(hDstDataset) // will close hSrcDataset and hGridDataset
* }
* \endcode
*
* @param hSrcDataset source (DEM) dataset. Must not be NULL.
* @param hGridDataset vertical grid shift dataset. Must not be NULL.
* @param bInverse if set to FALSE, hGridDataset values will be added to
* hSrcDataset. If set to TRUE, they will be subtracted.
* @param dfSrcUnitToMeter the factor to convert values from hSrcDataset to
* meters (1.0 if source values are in meter).
* @param dfDstUnitToMeter the factor to convert shifted values from meter
* (1.0 if output values must be in meter).
* @param papszOptions list of options, or NULL. Supported options are:
* <ul>
* <li>RESAMPLING=NEAREST/BILINEAR/CUBIC. Defaults to BILINEAR.</li>
* <li>MAX_ERROR=val. Maximum error measured in input pixels that is allowed in
* approximating the transformation (0.0 for exact calculations). Defaults
* to 0.125</li>
* <li>DATATYPE=Byte/UInt16/Int16/Float32/Float64. Output data type. If not
* specified will be the same as the one of hSrcDataset.
* <li>ERROR_ON_MISSING_VERT_SHIFT=YES/NO. Whether a missing/nodata value in
* hGridDataset should cause I/O requests to fail. Default is NO (in which case
* 0 will be used)
* <li>SRC_SRS=srs_def. Override projection on hSrcDataset;
* </ul>
*
* @return a new dataset corresponding to hSrcDataset adjusted with
* hGridDataset, or NULL. If not NULL, it must be closed with GDALClose().
*
* @since GDAL 2.2
*/
GDALDatasetH GDALApplyVerticalShiftGrid( GDALDatasetH hSrcDataset,
GDALDatasetH hGridDataset,
int bInverse,
double dfSrcUnitToMeter,
double dfDstUnitToMeter,
const char* const* papszOptions )
{
VALIDATE_POINTER1( hSrcDataset, "GDALApplyVerticalShiftGrid", nullptr );
VALIDATE_POINTER1( hGridDataset, "GDALApplyVerticalShiftGrid", nullptr );
double adfSrcGT[6];
if( GDALGetGeoTransform(hSrcDataset, adfSrcGT) != CE_None )
{
CPLError(CE_Failure, CPLE_NotSupported,
"Source dataset has no geotransform.");
return nullptr;
}
const char* pszSrcProjection = CSLFetchNameValueDef(papszOptions,
"SRC_SRS",
GDALGetProjectionRef(hSrcDataset));
if( pszSrcProjection == nullptr || pszSrcProjection[0] == '\0' )
{
CPLError(CE_Failure, CPLE_NotSupported,
"Source dataset has no projection.");
return nullptr;
}
if( GDALGetRasterCount(hSrcDataset) != 1 )
{
CPLError(CE_Failure, CPLE_NotSupported,
"Only single band source dataset is supported.");
return nullptr;
}
double adfGridGT[6];
if( GDALGetGeoTransform(hGridDataset, adfGridGT) != CE_None )
{
CPLError(CE_Failure, CPLE_NotSupported,
"Grid dataset has no geotransform.");
return nullptr;
}
const char* pszGridProjection = GDALGetProjectionRef(hGridDataset);
if( pszGridProjection == nullptr || pszGridProjection[0] == '\0' )
{
CPLError(CE_Failure, CPLE_NotSupported,
"Grid dataset has no projection.");
return nullptr;
}
if( GDALGetRasterCount(hGridDataset) != 1 )
{
CPLError(CE_Failure, CPLE_NotSupported,
"Only single band grid dataset is supported.");
return nullptr;
}
GDALDataType eDT = GDALGetRasterDataType(GDALGetRasterBand(hSrcDataset,1));
const char* pszDataType = CSLFetchNameValue(papszOptions, "DATATYPE");
if( pszDataType )
eDT = GDALGetDataTypeByName(pszDataType);
if( eDT == GDT_Unknown )
{
CPLError(CE_Failure, CPLE_NotSupported,
"Invalid DATATYPE=%s", pszDataType);
return nullptr;
}
const int nSrcXSize = GDALGetRasterXSize(hSrcDataset);
const int nSrcYSize = GDALGetRasterYSize(hSrcDataset);
OGRSpatialReference oSRS;
CPLString osSrcProjection(pszSrcProjection);
oSRS.SetFromUserInput(osSrcProjection);
if( oSRS.IsCompound() )
{
OGR_SRSNode* poNode = oSRS.GetRoot()->GetChild(1);
if( poNode != nullptr )
{
char* pszWKT = nullptr;
poNode->exportToWkt(&pszWKT);
osSrcProjection = pszWKT;
CPLFree(pszWKT);
}
}
void* hTransform = GDALCreateGenImgProjTransformer3( pszGridProjection,
adfGridGT,
osSrcProjection,
adfSrcGT );
if( hTransform == nullptr )
return nullptr;
GDALWarpOptions* psWO = GDALCreateWarpOptions();
psWO->hSrcDS = hGridDataset;
psWO->eResampleAlg = GRA_Bilinear;
const char* pszResampling = CSLFetchNameValue(papszOptions, "RESAMPLING");
if( pszResampling )
{
if( EQUAL(pszResampling, "NEAREST") )
psWO->eResampleAlg = GRA_NearestNeighbour;
else if( EQUAL(pszResampling, "BILINEAR") )
psWO->eResampleAlg = GRA_Bilinear;
else if( EQUAL(pszResampling, "CUBIC") )
psWO->eResampleAlg = GRA_Cubic;
}
psWO->eWorkingDataType = GDT_Float32;
int bHasNoData = FALSE;
const double dfSrcNoData = GDALGetRasterNoDataValue(
GDALGetRasterBand(hGridDataset, 1), &bHasNoData );
if( bHasNoData )
{
psWO->padfSrcNoDataReal =
static_cast<double*>(CPLMalloc(sizeof(double)));
psWO->padfSrcNoDataReal[0] = dfSrcNoData;
}
psWO->padfDstNoDataReal = static_cast<double*>(CPLMalloc(sizeof(double)));
const bool bErrorOnMissingShift = CPLFetchBool( papszOptions,
"ERROR_ON_MISSING_VERT_SHIFT",
false );
psWO->padfDstNoDataReal[0] =
(bErrorOnMissingShift) ? -std::numeric_limits<float>::infinity() : 0.0;
psWO->papszWarpOptions = CSLSetNameValue(psWO->papszWarpOptions,
"INIT_DEST",
"NO_DATA");
psWO->pfnTransformer = GDALGenImgProjTransform;
psWO->pTransformerArg = hTransform;
const double dfMaxError = CPLAtof(CSLFetchNameValueDef(papszOptions,
"MAX_ERROR",
"0.125"));
if( dfMaxError > 0.0 )
{
psWO->pTransformerArg =
GDALCreateApproxTransformer( psWO->pfnTransformer,
psWO->pTransformerArg,
dfMaxError );
psWO->pfnTransformer = GDALApproxTransform;
GDALApproxTransformerOwnsSubtransformer(psWO->pTransformerArg, TRUE);
}
psWO->nBandCount = 1;
psWO->panSrcBands = static_cast<int *>(CPLMalloc(sizeof(int)));
psWO->panSrcBands[0] = 1;
psWO->panDstBands = static_cast<int *>(CPLMalloc(sizeof(int)));
psWO->panDstBands[0] = 1;
VRTWarpedDataset* poReprojectedGrid =
new VRTWarpedDataset(nSrcXSize, nSrcYSize);
// This takes a reference on hGridDataset
CPLErr eErr = poReprojectedGrid->Initialize(psWO);
CPLAssert(eErr == CE_None);
CPL_IGNORE_RET_VAL(eErr);
GDALDestroyWarpOptions(psWO);
poReprojectedGrid->SetGeoTransform(adfSrcGT);
poReprojectedGrid->AddBand(GDT_Float32, nullptr);
GDALApplyVSGDataset* poOutDS = new GDALApplyVSGDataset(
reinterpret_cast<GDALDataset*>(hSrcDataset),
poReprojectedGrid,
eDT,
CPL_TO_BOOL(bInverse),
dfSrcUnitToMeter,
dfDstUnitToMeter,
// Undocumented option. For testing only
atoi(CSLFetchNameValueDef(papszOptions, "BLOCKSIZE", "256")) );
poReprojectedGrid->ReleaseRef();
if( !poOutDS->IsInitOK() )
{
delete poOutDS;
return nullptr;
}
poOutDS->SetDescription( GDALGetDescription( hSrcDataset ) );
return reinterpret_cast<GDALDatasetH>(poOutDS);
}
bool WriteTilesetHeader(const char *filename, int cols, int rows, int lod0size,
const DRECT &area, const vtProjection &proj,
float minheight, float maxheight,
LODMap *lodmap, bool bJPEG)
{
FILE *fp = vtFileOpen(filename, "wb");
if (!fp)
return false;
fprintf(fp, "[TilesetDescription]\n");
fprintf(fp, "Columns=%d\n", cols);
fprintf(fp, "Rows=%d\n", rows);
fprintf(fp, "LOD0_Size=%d\n", lod0size);
fprintf(fp, "Extent_Left=%.16lg\n", area.left);
fprintf(fp, "Extent_Right=%.16lg\n", area.right);
fprintf(fp, "Extent_Bottom=%.16lg\n", area.bottom);
fprintf(fp, "Extent_Top=%.16lg\n", area.top);
// write CRS, but pretty it up a bit
OGRSpatialReference *poSimpleClone = proj.Clone();
poSimpleClone->GetRoot()->StripNodes( "AXIS" );
poSimpleClone->GetRoot()->StripNodes( "AUTHORITY" );
char *wkt;
poSimpleClone->exportToWkt(&wkt);
fprintf(fp, "CRS=%s\n", wkt);
OGRFree(wkt); // Free CRS
delete poSimpleClone;
// For elevation tilesets, also write vertical extents
if (minheight != INVALID_ELEVATION)
{
fprintf(fp, "Elevation_Min=%.f\n", minheight);
fprintf(fp, "Elevation_Max=%.f\n", maxheight);
}
if (lodmap != NULL)
{
int mmin, mmax;
for (int i = 0; i < rows; i++)
{
fprintf(fp, "RowLODs %2d:", i);
for (int j = 0; j < cols; j++)
{
lodmap->get(j, i, mmin, mmax);
fprintf(fp, " %d/%d", mmin, mmax);
}
fprintf(fp, "\n");
}
}
// create a transformation that will map from the current projection to Lat/Lon WGS84
vtProjection proj_llwgs84;
proj_llwgs84.SetWellKnownGeogCS("WGS84");
OCT *LLWGS84transform=CreateCoordTransform(&proj,&proj_llwgs84);
// write center point of the tileset in Lat/Lon WGS84
// this is helpful for libMini to compute an approximate translation
double cx=(area.left+area.right)/2;
double cy=(area.bottom+area.top)/2;
if (LLWGS84transform->Transform(1,&cx,&cy)==1)
fprintf(fp, "CenterPoint_LLWGS84=(%.16lg,%.16lg)\n",cx,cy);
// write north point of the tileset in Lat/Lon WGS84
// this is helpful for libMini to compute an approximate rotation
double nx=(area.left+area.right)/2;
double ny=area.top;
if (LLWGS84transform->Transform(1,&nx,&ny)==1)
fprintf(fp, "NorthPoint_LLWGS84=(%.16lg,%.16lg)\n",nx,ny);
// delete Lat/Lon WGS84 transformation
delete LLWGS84transform;
// write CRS info
// this is helpful for libMini to easily identify the coordinate reference system
// supported CRS are: Geographic, UTM, Mercator
const int crs=mapCRS2MINI(proj);
const int datum=mapEPSG2MINI(proj.GetDatum());
const int utmzone=proj.GetUTMZone();
fprintf(fp, "CoordSys=(%d,%d,%d)\n",crs,datum,utmzone);
if (bJPEG)
fprintf(fp, "Format=JPEG\n");
else
fprintf(fp, "Format=DB\n");
fclose(fp);
return true;
}