Hello list I am trying to create a .VRT file to mosaic a bunch of HDF5 files. It is starting to work, except for the fact that I can't seem to set the relativeToVRT attribute of the SourceFilename tag to "0".
I've been adapting the online vrt tutorial[1] from C++ to Python. The tutorial says that relativeToVRT will default to "0", but I'm getting the exact opposite. It is defaulting to "1", and even if I try to set it to "0" explicitly when using the SetMetadataItem method, it will still be saved as a "1". I have included an excerpt of the code at the end of this message. I'll post the rest of it if it is relevant. After saving the file, I can open a text editor and replace all the "1" with "0" and this fixes it, allowing me to get the desired visualization (on QGIS). Am I doing something wrong here? Or is this possibly a bug? I'm using gdal 1.7.3, as available on the ubuntugis-unstable repository. Another question: is it possible to use derived bands via python bindings? I guess I'll have to write a pixel function and somehow register it with gdal... [1] - http://www.gdal.org/gdal_vrttut.html [2] - python code follows: def get_xml_source(fileName, dataSet, xSize, ySize, dType, blockX, blockY, sXOff, sYOff, sXSize, sYSize, dXOff, dYOff, dXSize, dYSize, relToVRT=0, band=1): template = """ <SimpleSource> <SourceFilename relativeToVRT='%i'>HDF5:%s://%s</SourceFilename> <SourceBand>%i</SourceBand> <SourceProperties RasterXSize='%i' RasterYSize='%i' DataType='%s' BlockXSize='%i' BlockYSize='%i' /> <SrcRect xOff='%i' yOff='%i' xSize='%i' ySize='%i' /> <DstRect xOff='%i' yOff='%i' xSize='%i' ySize='%i' /> </SimpleSource> """ return template % (relToVRT, fileName, dataSet, band, xSize, ySize, dType, blockX, blockY, sXOff, sYOff, sXSize, sYSize, dXOff, dYOff, dXSize, dYSize) .... somewhere down the code... xmlSource = get_xml_source(lit, dataSet, xResolution, yResolution, "Int16", blockXSize, blockYSize, 0, 0, xResolution, yResolution, xOff, yOff, xResolution, yResolution) outBand.SetMetadataItem("teste", xmlSource, "new_vrt_sources") -- ___________________________ ___ __ Ricardo Garcia Silva _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
