I'm performing raster analysis on a QGIS 2.14 project CRS is EPSG: 32632. I used the official 10m DEM extracting the area of interest of 446 raster cells. I've made a slope map in 5 classes, and this task was accomplished without problems.
Then I used Raster Calculator to reclass the slope map assigning weight to each class as follows:
0-10% -> 2; 11-20% -> 1; 21-35% -> 0; 36-50% -> -1; >50% -> -2
So I inserted the following expression:
( "Slope_clip_UTM@1" < 11 ) * 2 + ( ( "Slope_clip_UTM@1" >= 11 ) AND ( "Slope_clip_UTM@1" < 20 ) ) * 1 + ( ( "Slope_clip_UTM@1" >= 20 ) AND ( "Slope_clip_UTM@1" < 36 ) ) * 0 + ( ( "Slope_clip_UTM@1" >= 36 ) AND ( "Slope_clip_UTM@1" < 50 ) ) * -1 + ( "Slope_clip_UTM@1" >= 50 )*-2*
First I've performed raster calculation on a slope raster the CRS of which was EPSG 3003 by default and I obtained an empty raster (no cells and no values), but when I carghed Min/Max values they were both equal 2.
Latter attempt was made right after saving the slope raster in EPSG 32632, the same of the Project: this time as a result I obtained an uniform raster in wich the values of each cell is equal to 0; but when I charged Min/Max this values are both equal to 1.79769e+308.
How do I fix the problem?