DEM - Spurious local low elevation and rivers dug too deep

rosepearson / GeoFabrics

A package for generating hydrologically conditioned DEMs and roughness maps from LiDAR and other infrastructure data. Check the wiki for install and usage instructions, and documentation at https://rosepearson.github.io/GeoFabrics/

GNU General Public License v3.0

27 stars 11 forks source link

DEM - Spurious local low elevation and rivers dug too deep #218

Closed JoePelmard closed 7 months ago

JoePelmard commented 11 months ago

In the new DEM generated for the Heretaunga plains (Napier), I found a spurious hole in the Oingo lake with z going to -100m when elevations around this location are about 20m (see image below Location: x=1921706 ; y=5614662)

Similarly in the Aropaoanui catchment, the te Ngarue stream is dug too deep ( z going to -40m, see image below). This might appear in other tiles.

After talking with Alice, I was suggested to raise an issue in here.

Regards, Joe

rosepearson commented 7 months ago

Thanks @JoePelmard. This has been addressed through updating the parameters being used to control how the DEM is generated. I will close this here. For your record the case where this was addressed is: https://git.niwa.co.nz/flood-resilience-aotearoa/cylc-combine-geofabric-tiles/-/issues/4