On Monday 06 July 2009, Michael Perdue wrote: > I was able to generate a ENVI style header that will allow you to read > the files with GDAL. Modify as necessary and you should be able to > work with the *.img files.
Fantastic. Thanks for the tips Mike. I will give this a try. For the record, Frank W. over on the GDAL mailing list suggested the code samples below. A script could be used to generate a single file for all 224 bands. # make one of these for the entire set of data # add more VRTRasterBand elements for the bands you want: # <VRTDataset rasterXSize="614" rasterYSize="512"> <VRTRasterBand dataType="Int16" band="1" subClass="VRTRawRasterBand"> <SourceFilename relativetoVRT="1">f970619t01p02_r02_sc01.c.img</SourceFilename> <ImageOffset>0</ImageOffset> <PixelOffset>448</PixelOffset> <LineOffset>275072</LineOffset> <ByteOrder>MSB</ByteOrder> </VRTRasterBand> </VRTDataset> # multi-band example: <VRTDataset rasterXSize="614" rasterYSize="512"> <VRTRasterBand dataType="Int16" band="1" subClass="VRTRawRasterBand"> <SourceFilename relativetoVRT="1">f970619t01p02_r02_sc01.c.img</SourceFilename> <ImageOffset>0</ImageOffset> <PixelOffset>448</PixelOffset> <LineOffset>275072</LineOffset> <ByteOrder>MSB</ByteOrder> </VRTRasterBand> <VRTRasterBand dataType="Int16" band="2" subClass="VRTRawRasterBand"> <SourceFilename relativetoVRT="1">f970619t01p02_r02_sc01.c.img</SourceFilename> <ImageOffset>2</ImageOffset> <PixelOffset>448</PixelOffset> <LineOffset>275072</LineOffset> <ByteOrder>MSB</ByteOrder> </VRTRasterBand> </VRTDataset> This works well in QGIS-- and I imagine in GRASS as well. The tricky part from here is applying the rectification and "navigation" parameters... Cheers, Dylan > On 5-Jul-09, at 6:56 PM, Michael Perdue wrote: > > ... you might be able to manipulate GDAL to read it. If you can > > create a header file for a generic binary file that will provide > > GDAL with the number of rows, columns, byte order, #channels, # of > > bytes/sample and the interleave method then you can tell GDAL how to > > read it. > > > > On 5-Jul-09, at 3:49 PM, Dylan Beaudette wrote: > >> I > >> have tried working with the "radiance" data, which when uncompressed > >> comes with several .img files-- however my copy of GDAL does not know > >> what to make of it. It looks like it may be possible [2] to import > >> the > >> data using r.in.bin... I was not able to get this working. > > Cheers, > > Mike -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341 _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user