I'm a new user of QGIS and learning some tips from this book https://www.amazon.com.au/Learn-QGIS-Andrew-Cutts/dp/1788997425. I'm currently practising how to use raster calculator to find areas at elevations > 1000 m with a slope < 5 m.
- First, I downloaded the image from http://srtm.csi.cgiar.org/wp-content/uploads/files/srtm_5x5/TIFF/srtm_05_01.zip (WGS84 projection)
- Then I loaded this .tiff file to QGIS and saved a new layer DEM_local with another projection (NAD27-ESPG:2964)
- After that I used Slope tool for this DEM_local to make a new slope layer.
- Use raster calculator to find elevations > 1000m and Slope < 5m
Although I followed book guides the result layer was still disable. Some previous posts said it's caused by improper layer names or projections. As they suggested, I've changed srtm_05_01 to srtm0501 or checked projections , but the problem still remains.
The range of raster_calculator_eg should be 0 - 1 (similar to this book) instead of +/- 1.79769e+308
Could anyone please help me?