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; }