I spend the whole last week in trying to find a way to merge two DEM files without steps between then.
When using the feathering option in GlobalMapper, both DEMs merge just perfect until I export them to GeoTIFF or whatever other format. When I re-open that saved new DEM, the merger/feather areas are full of steps.
See attached screenshots from GlobalMapper. The first one shows how it looks like after the feathering has been done along selected polys, the second ones shows the result of the same after it has been saved.
What I did so far:
- Brought both DEMs up to exactly the same resolution.
- Tried all kinds of resample options GlobalMapper offers
- Saved the whole thing in a higher resolution. After that the steps are smaller but still there.
- Tried almost all other export formats GlobalMapper offers
Any help would be highly appreciated.