bool BAGRasterBand::Initialize( hid_t hDatasetID, const char *pszName )
{
SetDescription( pszName );
this->hDatasetID = hDatasetID;
hid_t datatype = H5Dget_type( hDatasetID );
dataspace = H5Dget_space( hDatasetID );
hid_t n_dims = H5Sget_simple_extent_ndims( dataspace );
native = H5Tget_native_type( datatype, H5T_DIR_ASCEND );
hsize_t dims[3], maxdims[3];
eDataType = GH5_GetDataType( native );
if( n_dims == 2 )
{
H5Sget_simple_extent_dims( dataspace, dims, maxdims );
nRasterXSize = dims[1];
nRasterYSize = dims[0];
}
else
{
CPLError( CE_Failure, CPLE_AppDefined,
"Dataset not of rank 2." );
return false;
}
nBlockXSize = nRasterXSize;
nBlockYSize = 1;
/* -------------------------------------------------------------------- */
/* Check for chunksize, and use it as blocksize for optimized */
/* reading. */
/* -------------------------------------------------------------------- */
hid_t listid = H5Dget_create_plist( hDatasetID );
if (listid>0)
{
if(H5Pget_layout(listid) == H5D_CHUNKED)
{
hsize_t panChunkDims[3];
int nDimSize = H5Pget_chunk(listid, 3, panChunkDims);
nBlockXSize = panChunkDims[nDimSize-1];
nBlockYSize = panChunkDims[nDimSize-2];
}
H5Pclose(listid);
}
/* -------------------------------------------------------------------- */
/* Load min/max information. */
/* -------------------------------------------------------------------- */
if( EQUAL(pszName,"elevation")
&& GH5_FetchAttribute( hDatasetID, "Maximum Elevation Value",
dfMaximum )
&& GH5_FetchAttribute( hDatasetID, "Minimum Elevation Value",
dfMinimum ) )
bMinMaxSet = true;
else if( EQUAL(pszName,"uncertainty")
&& GH5_FetchAttribute( hDatasetID, "Maximum Uncertainty Value",
dfMaximum )
&& GH5_FetchAttribute( hDatasetID, "Minimum Uncertainty Value",
dfMinimum ) )
bMinMaxSet = true;
else if( EQUAL(pszName,"nominal_elevation")
&& GH5_FetchAttribute( hDatasetID, "max_value",
dfMaximum )
&& GH5_FetchAttribute( hDatasetID, "min_value",
dfMinimum ) )
bMinMaxSet = true;
return true;
}
bool BAGRasterBand::Initialize( hid_t hDatasetID, const char *pszName )
{
SetDescription( pszName );
this->hDatasetID = hDatasetID;
hid_t datatype = H5Dget_type( hDatasetID );
dataspace = H5Dget_space( hDatasetID );
int n_dims = H5Sget_simple_extent_ndims( dataspace );
native = H5Tget_native_type( datatype, H5T_DIR_ASCEND );
hsize_t dims[3], maxdims[3];
eDataType = GH5_GetDataType( native );
if( n_dims == 2 )
{
H5Sget_simple_extent_dims( dataspace, dims, maxdims );
nRasterXSize = (int) dims[1];
nRasterYSize = (int) dims[0];
}
else
{
CPLError( CE_Failure, CPLE_AppDefined,
"Dataset not of rank 2." );
return false;
}
nBlockXSize = nRasterXSize;
nBlockYSize = 1;
/* -------------------------------------------------------------------- */
/* Check for chunksize, and use it as blocksize for optimized */
/* reading. */
/* -------------------------------------------------------------------- */
hid_t listid = H5Dget_create_plist( hDatasetID );
if (listid>0)
{
if(H5Pget_layout(listid) == H5D_CHUNKED)
{
hsize_t panChunkDims[3];
int nDimSize = H5Pget_chunk(listid, 3, panChunkDims);
nBlockXSize = (int) panChunkDims[nDimSize-1];
nBlockYSize = (int) panChunkDims[nDimSize-2];
}
int nfilters = H5Pget_nfilters( listid );
H5Z_filter_t filter;
char name[120];
size_t cd_nelmts = 20;
unsigned int cd_values[20];
unsigned int flags;
for (int i = 0; i < nfilters; i++)
{
filter = H5Pget_filter(listid, i, &flags, (size_t *)&cd_nelmts, cd_values, 120, name);
if (filter == H5Z_FILTER_DEFLATE)
poDS->SetMetadataItem( "COMPRESSION", "DEFLATE", "IMAGE_STRUCTURE" );
else if (filter == H5Z_FILTER_NBIT)
poDS->SetMetadataItem( "COMPRESSION", "NBIT", "IMAGE_STRUCTURE" );
else if (filter == H5Z_FILTER_SCALEOFFSET)
poDS->SetMetadataItem( "COMPRESSION", "SCALEOFFSET", "IMAGE_STRUCTURE" );
else if (filter == H5Z_FILTER_SZIP)
poDS->SetMetadataItem( "COMPRESSION", "SZIP", "IMAGE_STRUCTURE" );
}
H5Pclose(listid);
}
/* -------------------------------------------------------------------- */
/* Load min/max information. */
/* -------------------------------------------------------------------- */
if( EQUAL(pszName,"elevation")
&& GH5_FetchAttribute( hDatasetID, "Maximum Elevation Value",
dfMaximum )
&& GH5_FetchAttribute( hDatasetID, "Minimum Elevation Value",
dfMinimum ) )
bMinMaxSet = true;
else if( EQUAL(pszName,"uncertainty")
&& GH5_FetchAttribute( hDatasetID, "Maximum Uncertainty Value",
dfMaximum )
&& GH5_FetchAttribute( hDatasetID, "Minimum Uncertainty Value",
dfMinimum ) )
{
/* Some products where uncertainty band is completely set to nodata */
/* wrongly declare minimum and maximum to 0.0 */
if( dfMinimum != 0.0 && dfMaximum != 0.0 )
bMinMaxSet = true;
}
else if( EQUAL(pszName,"nominal_elevation")
&& GH5_FetchAttribute( hDatasetID, "max_value",
dfMaximum )
&& GH5_FetchAttribute( hDatasetID, "min_value",
dfMinimum ) )
bMinMaxSet = true;
return true;
}
