I'm trying to process a GeoTIFF in QGIS 1.8 using SEXTANTE and GRASS via the r.neighbors tool. I'd like to process the image, then be able to utlize it in ArcGIS.
The problem I'm running into is that the output file has a different nodata value than the input, and Arc isn't recognizing the correct nodata value (which is 3 E-38). Arc reads the output file as having a nodata value of 0, and QGIS reads it of having a nodata value of NaN. This causes Arc to render the file incorrectly, and makes utilizing the output file in Arc difficult.
When identifying nodata pixels in ArcGIS, they return the cell value of nodata, however the raster's nodata value is 0, instead of nodata (as in the cell value nodata). This causes them to be rendered as black, instead of nofill, and may impact further processing of the file.