Dear friends, I am making a map of directions, with mdt-25 and the new version of sextant, 324 algorithms. As you'll see in the picture I attached, many of the values I get are negative, the option of choosing both radians and degrees. I guess I should do a post-processing to remove these values and take them to 0 or something to represent the raster in steps of guidance. Any suggestions? [image: Inline images 1] -- Sáez