When I import DEM raster layers and try to change the contrast to "no enhancement" I get a blank white image in the map window. Changing "black to white" to "white to black", the map remains a blank white image.

I want to import DEMs without stretching the histogram at all as some of them may be 8-bit images.

How can I get an un-stretched image in the map window?

  • How many bands has your raster? Is there any kind of colour interpretation stored in the file metadata? – AndreJ Feb 8 '15 at 18:43
  • It's a single band grayscale DEM. 16-bit but sometimes 8-bit. Very very dark- you know what they look like. They will export as unchanged, but I was hoping that the map window could display them without any "stretching" of the levels. – Joe LeMonnier Feb 9 '15 at 18:14

"No enhancement" means that the colour range is from 0 to infinity (or 32768, depending on the datatype).

QGIS usually scales between 2% and 98%, which might lead to an almost unicoloured rendering, when your data is within the first 2%.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.