Re: [GRASS-user] creating high-resolution DMT

2017-04-15 Thread Benjamin Ducke
On 15/04/17 05:31, Vaclav Petras wrote: > Back to filling holes in lidar data, I also think that the "fill in the > gaps" approach is quite promising, so I ported the r.fill.gaps module to G7: Great! I have read the diff and that was very helpful for me. I can see that the old and new raster APIs

Re: [GRASS-user] creating high-resolution DMT

2017-04-14 Thread Vaclav Petras
On Tue, Mar 21, 2017 at 10:01 AM, Markus Neteler wrote: > > > Another drawback is that it was written > > for GRASS 6 (but converting it to GRASS 7 should not > > be hard, since it uses only the basic raster API). > > FWIW New names can be looked up here: >

Re: [GRASS-user] creating high-resolution DMT

2017-04-14 Thread Vaclav Petras
Back to filling holes in lidar data, I also think that the "fill in the gaps" approach is quite promising, so I ported the r.fill.gaps module to G7: https://grass.osgeo.org/grass72/manuals/addons/r.fill.gaps.html I didn't review the code, but the documentation is very nice and detailed. I did

Re: [GRASS-user] creating high-resolution DMT

2017-03-21 Thread Markus Neteler
On Tue, Mar 21, 2017 at 12:29 PM, Benjamin Ducke wrote: ... > I just realized that I have never committed "r.fill.gaps" > to the add-ins repo. > > I have just done that now: > http://grasswiki.osgeo.org/wiki/AddOns/GRASS_6#r.fill.gaps cool! ... > The code is optimized to

Re: [GRASS-user] creating high-resolution DMT

2017-03-21 Thread Benjamin Ducke
On 21/03/17 10:12, Blumentrath, Stefan wrote: > Hei Martin, > > Same experience here. For larger datasets from LiDAR I rather use IDW > for interpolation. I just realized that I have never committed "r.fill.gaps" to the add-ins repo. I have just done that now:

Re: [GRASS-user] creating high-resolution DMT

2017-03-21 Thread 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

[GRASS-user] creating high-resolution DMT

2017-03-21 Thread Martin Landa
Hi, recently I was playing with DMT products available in Czech Republic, basically: * DMR4G regular grid of points (spacing 5m) * DMR5G irregular point network (average spacing ~3m) When creating raster-based DMT I tested scenarios bellow: 1) create raster with resolution 5m from DMR4G (no