Hello,
I'm using 20-m contour maps to create a DEM of a river system using TopoToRaster. In general it works fine if the contour lines are near each other, but the function over-interpolates between widely spaced contour lines. I realize that this is maybe a natural product of interpolation, but since TopoToRaster is specifically for creating hydrologically correct DEMs, I thought there might be some fix that I haven't figured out? Or a setting that can be changed?
I've attached a map illustrating my problem. Currently the TopoToRaster-created DEM is classified to match the contour lines, but you can see there are elevations which exceed the 20 m difference within one contour. Most problematic are the low-areas within the river valley itself.
Any help on this wouuld be greatly apprecaited.
Thanks so much,
Stephanie
I'm using 20-m contour maps to create a DEM of a river system using TopoToRaster. In general it works fine if the contour lines are near each other, but the function over-interpolates between widely spaced contour lines. I realize that this is maybe a natural product of interpolation, but since TopoToRaster is specifically for creating hydrologically correct DEMs, I thought there might be some fix that I haven't figured out? Or a setting that can be changed?
I've attached a map illustrating my problem. Currently the TopoToRaster-created DEM is classified to match the contour lines, but you can see there are elevations which exceed the 20 m difference within one contour. Most problematic are the low-areas within the river valley itself.
Any help on this wouuld be greatly apprecaited.
Thanks so much,
Stephanie