/**
* Get Geotransform information for COSMO-SKYMED files
* In case of success it stores the transformation
* in adfGeoTransform. In case of failure it doesn't
* modify adfGeoTransform
* @param iProductType type of CSK subproduct, see HDF5CSKProduct
*/
void HDF5ImageDataset::CaptureCSKGeoTransform(int iProductType)
{
const char *pszSubdatasetName = GetSubdatasetName();
bHasGeoTransform = false;
//If the product level is not L1C or L1D then
//it doesn't have a valid projection
if(iProductType == PROD_CSK_L1C || iProductType == PROD_CSK_L1D)
{
//If there is a subdataset
if(pszSubdatasetName != NULL)
{
CPLString osULPath = pszSubdatasetName ;
osULPath += "/Top Left East-North";
CPLString osLineSpacingPath = pszSubdatasetName;
osLineSpacingPath += "/Line Spacing";
CPLString osColumnSpacingPath = pszSubdatasetName;
osColumnSpacingPath += "/Column Spacing";
double *pdOutUL = NULL;
double *pdLineSpacing = NULL;
double *pdColumnSpacing = NULL;
//If it could find the attributes on the metadata
if(HDF5ReadDoubleAttr(osULPath.c_str(), &pdOutUL) == CE_Failure ||
HDF5ReadDoubleAttr(osLineSpacingPath.c_str(), &pdLineSpacing) == CE_Failure ||
HDF5ReadDoubleAttr(osColumnSpacingPath.c_str(), &pdColumnSpacing) == CE_Failure)
{
bHasGeoTransform = false;
}
else
{
// geotransform[1] : width of pixel
// geotransform[4] : rotational coefficient, zero for north up images.
// geotransform[2] : rotational coefficient, zero for north up images.
// geotransform[5] : height of pixel (but negative)
adfGeoTransform[0] = pdOutUL[0];
adfGeoTransform[1] = pdLineSpacing[0];
adfGeoTransform[2] = 0;
adfGeoTransform[3] = pdOutUL[1];
adfGeoTransform[4] = 0;
adfGeoTransform[5] = -pdColumnSpacing[0];
CPLFree(pdOutUL);
CPLFree(pdLineSpacing);
CPLFree(pdColumnSpacing);
bHasGeoTransform = TRUE;
}
}
}
}
/**
* Captures Geolocation information from a COSMO-SKYMED
* file.
* The geoid will allways be WGS84
* The projection type may be UTM or UPS, depending on the
* latitude from the center of the image.
* @param iProductType type of CSK subproduct, see HDF5CSKProduct
*/
void HDF5ImageDataset::CaptureCSKGeolocation(int iProductType)
{
double *dfProjFalseEastNorth;
double *dfProjScaleFactor;
double *dfCenterCoord;
//Set the ellipsoid to WGS84
oSRS.SetWellKnownGeogCS( "WGS84" );
if(iProductType == PROD_CSK_L1C||iProductType == PROD_CSK_L1D)
{
//Check if all the metadata attributes are present
if(HDF5ReadDoubleAttr("Map Projection False East-North", &dfProjFalseEastNorth) == CE_Failure||
HDF5ReadDoubleAttr("Map Projection Scale Factor", &dfProjScaleFactor) == CE_Failure||
HDF5ReadDoubleAttr("Map Projection Centre", &dfCenterCoord) == CE_Failure||
GetMetadataItem("Projection_ID") == NULL)
{
pszProjection = CPLStrdup("");
pszGCPProjection = CPLStrdup("");
CPLError( CE_Failure, CPLE_OpenFailed,
"The CSK hdf5 file geolocation information is malformed\n" );
}
else
{
//Fetch projection Type
CPLString osProjectionID = GetMetadataItem("Projection_ID");
//If the projection is UTM
if(EQUAL(osProjectionID,"UTM"))
{
// @TODO: use SetUTM
oSRS.SetProjCS(SRS_PT_TRANSVERSE_MERCATOR);
oSRS.SetTM(dfCenterCoord[0],
dfCenterCoord[1],
dfProjScaleFactor[0],
dfProjFalseEastNorth[0],
dfProjFalseEastNorth[1]);
}
else
{
//TODO Test! I didn't had any UPS projected files to test!
//If the projection is UPS
if(EQUAL(osProjectionID,"UPS"))
{
oSRS.SetProjCS(SRS_PT_POLAR_STEREOGRAPHIC);
oSRS.SetPS(dfCenterCoord[0],
dfCenterCoord[1],
dfProjScaleFactor[0],
dfProjFalseEastNorth[0],
dfProjFalseEastNorth[1]);
}
}
//Export Projection to Wkt.
//In case of error then clean the projection
if (oSRS.exportToWkt(&pszProjection) != OGRERR_NONE)
pszProjection = CPLStrdup("");
CPLFree(dfCenterCoord);
CPLFree(dfProjScaleFactor);
CPLFree(dfProjFalseEastNorth);
}
}
else
{
//Export GCPProjection to Wkt.
//In case of error then clean the projection
if(oSRS.exportToWkt(&pszGCPProjection) != OGRERR_NONE)
pszGCPProjection = CPLStrdup("");
}
}
/**
* Retrieves and stores the GCPs from a COSMO-SKYMED dataset
* It only retrieves the GCPs for L0, L1A and L1B products
* for L1C and L1D products, geotransform is provided.
* The GCPs provided will be the Image's corners.
* @param iProductType type of CSK product @see HDF5CSKProductEnum
*/
void HDF5ImageDataset::CaptureCSKGCPs(int iProductType)
{
//Only retrieve GCPs for L0,L1A and L1B products
if(iProductType == PROD_CSK_L0||iProductType == PROD_CSK_L1A||
iProductType == PROD_CSK_L1B)
{
int i;
double *pdCornerCoordinates;
nGCPCount=4;
pasGCPList = (GDAL_GCP *) CPLCalloc(sizeof(GDAL_GCP),4);
CPLString osCornerName[4];
double pdCornerPixel[4];
double pdCornerLine[4];
const char *pszSubdatasetName = GetSubdatasetName();
//Load the subdataset name first
for(i=0;i <4;i++)
osCornerName[i] = pszSubdatasetName;
//Load the attribute name, and raster coordinates for
//all the corners
osCornerName[0] += "/Top Left Geodetic Coordinates";
pdCornerPixel[0] = 0;
pdCornerLine[0] = 0;
osCornerName[1] += "/Top Right Geodetic Coordinates";
pdCornerPixel[1] = GetRasterXSize();
pdCornerLine[1] = 0;
osCornerName[2] += "/Bottom Left Geodetic Coordinates";
pdCornerPixel[2] = 0;
pdCornerLine[2] = GetRasterYSize();
osCornerName[3] += "/Bottom Right Geodetic Coordinates";
pdCornerPixel[3] = GetRasterXSize();
pdCornerLine[3] = GetRasterYSize();
//For all the image's corners
for(i=0;i<4;i++)
{
GDALInitGCPs( 1, pasGCPList + i );
CPLFree( pasGCPList[i].pszId );
pasGCPList[i].pszId = NULL;
//Retrieve the attributes
if(HDF5ReadDoubleAttr(osCornerName[i].c_str(),
&pdCornerCoordinates) == CE_Failure)
{
CPLError( CE_Failure, CPLE_OpenFailed,
"Error retrieving CSK GCPs\n" );
// Free on failure, e.g. in case of QLK subdataset.
for( int i = 0; i < 4; i++ )
{
if( pasGCPList[i].pszId )
CPLFree( pasGCPList[i].pszId );
if( pasGCPList[i].pszInfo )
CPLFree( pasGCPList[i].pszInfo );
}
CPLFree( pasGCPList );
pasGCPList = NULL;
nGCPCount = 0;
break;
}
//Fill the GCPs name
pasGCPList[i].pszId = CPLStrdup( osCornerName[i].c_str() );
//Fill the coordinates
pasGCPList[i].dfGCPX = pdCornerCoordinates[1];
pasGCPList[i].dfGCPY = pdCornerCoordinates[0];
pasGCPList[i].dfGCPZ = pdCornerCoordinates[2];
pasGCPList[i].dfGCPPixel = pdCornerPixel[i];
pasGCPList[i].dfGCPLine = pdCornerLine[i];
//Free the returned coordinates
CPLFree(pdCornerCoordinates);
}
}
}
