On lundi 27 février 2017 03:55:54 CET Taylor Alexander Brown wrote: > Greetings GDAL Community, > > I am developing an application [0] to process georeferenced raster > hyperspectral imagery in ENVI format from NASA's Airborne > Visual/Infrared Imaging Spectrometer (AVIRIS) [1]. > > The `map info` section of the header files contain an undocumented [2] > rotation field which is currently ignored by GDAL. As a result, the > image is rotated incorrectly when I process it with `gdalwarp` or the > GDAL Python API. Furthermore, the image is scaled incorrectly when I try > to override the geotransform. > > I documented my experiences on the GIS Stack Exchange [3]. It has > previously been described on the GDAL mailing list [4] and bug tracker > [5]. I believe this issue also affects ASTER imagery [6][7]. > > I have implemented a fix based off of branch `tags/2.1.3` and shared my > code on GitHub [8]. It reads the `units` and `rotation` parameter from > the `map info` section and uses these to calculate the geotransform. The > scaling was off because the code expected the `units` parameter to be > the last element in the list, when in my case it was the second to last. > You can verify this behavior with the single-band image I have been > using for testing [9]. > > You are welcome to evaluate my code and contribute it back to the > library. I am a novice at both GDAL and GIS, so there may well be > problems. I would be willing to submit a pull request against your > GitHub mirror if desired.
Yes, please issue a P.R. against the github mirror. Preferably against trunk which has more complete regression testing. Even -- Spatialys - Geospatial professional services http://www.spatialys.com
_______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
