New answers tagged

1 vote
Accepted

Raster DEM projection rendering problem

Your DEM is in a geographic CRS (coordinate are in degree and reference the location on an ellipsoid). If you dont set a specific projection QGIS use by default an less than adequate projection (Plate ...
  • 13.1k
1 vote

Detect sharp changes in elevation

Use the slope tool in Arc with D8 or Dinf checked, and output set as degree. It will generate a raster which you can then threshold in your raster calculator. These sharp changes are likely above 85° ...
  • 11
2 votes
Accepted

Polygons from a raster within an elevation range

Using standard Qgis Contour that is a front end to gdal_contour utility. The solution to draw polygons instead lines is to add these parameters in addition to the command line, -amin -amax is the ...
  • 376
0 votes

Polygons from a raster within an elevation range

As a workaround you could use this workflow: You need to translate your Line-Geometry to a Polygon-Geometry. You could use a buffer with a very small buffersize for this. If you habe more than one ...
  • 315
-1 votes

Adjusting heights of two DTM rasters using ArcMap

If I understand your post, this is the situation: The summer DTM values are correct. Some (or all) winter DTM values do not match their corresponding summer values. Therefore, they are in error and ...
  • 7,210

Top 50 recent answers are included