I am trying to convert a DEM file from meters to feet using a fairly simple formula. The range of elevations in the source file is 551 - 1250.
- When I multiply by 3.28 I get nan results.
- When I multiply by 1.1 I get the expected results (although obviously, this is not a useful conversion to feet from meters)
I didn't have this problem with the essen version of qgis, but I recently upgraded to 2.18.