Am 11.08.2014 15:27, schrieb SCHULZ Wolfgang:
Hello, I want to import the following data (hdf format) into QGIS:
http://ghrc.nsstc.nasa.gov/hydro/search.pl?method=quick&keyword=HRFC&context=Any+field
Any idea how to georeference it? I can import it. The interesting
layer of the hdf4 file is the first layer. The layer should contain
data -180 to +180 longitude and -90 to +90 latitude in 0.5 degree
resolution. How can I tell to QGIS the limits of the data layer for a
hdf4 file?
If you query the subdatasets of the HDF file with
gdalinfo LISOTD_HRFC_V2.3.2013.hdf
gdalinfo HDF4_SDS:UNKOWN:"LISOTD_HRFC_V2.3.2013.hdf":0
gdalinfo HDF4_SDS:UNKOWN:"LISOTD_HRFC_V2.3.2013.hdf":1
gdalinfo HDF4_SDS:UNKOWN:"LISOTD_HRFC_V2.3.2013.hdf":2
you learn that SDS 1 contains the longitudes from -180 to +180, and SDS
2 the latitudes from -90 to +90. Unfortunately, the GDAL driver is not
able to use these coordinate infos.
I got around it by extracting the SDS 0 and applying the corner
coordinates with GDAL:
gdal_translate -a_srs EPSG:4326 -a_ullr -180 -90 180 90 -of "Gtiff"
HDF4_SDS:UNKOWN:"LISOTD_HRFC_V2.3.2013.hdf":0 test.tif
HTH,
André Joost
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