[GRASS-user] creating high-resolution DMT

[Blumentrath, Stefan]

Hei Martin,

Same experience here.
For larger datasets from LiDAR I rather use IDW for interpolation.

The "per hole filling" in r.fillnulls is not utilizing multiple cores and if you have a lot of holes that can slow down the whole process significantly.
Not sure if a mask can help to avoid filling no data areas around your data.

For r.fillnulls there is an enhancement ticket (with a patch) for speedup of the patching of the maps at the end...
https://trac.osgeo.org/grass/ticket/1938
However, it does not tackle parallel filling of holes...

Cheers
Stefan