María and list On Thu, May 14, 2020, 00:46 Priv.-Doz. Dr. Maria Shinoto < [email protected]> wrote:
> Chris, > > Thank you for your ideas. I am trying now, but there are some questions: > > > For this, rather than use the Raster > Rasterize tool, the approach > should be: > > • open the processing toolbox Processing > Toolbox > > • in the toolbox open Interpolation > TIN interpolation > > OK until this point > > > > • in the TIN Interpolation screen: > > • select the Vector layer > > OK. > > > • select the Interpolation attribute > > First problem: I stored the vector layer in a Geopackage; so I have an fid > from the geopackage database, an ID from the original xyz-File in field_1, > and the x, y, z values in field_2, _3 and _4. > > Which attribute should I choose? I think only field_2 and field_3? > No you just want the elevation field here I guess it's your _4? > > There is a checkbox for the Z-coordinate, whether I with to use it for > interpolation. I guess I leave unchecked? > Yes > > > • click the + to add to the vector layer panel > > So I added the two fields, they are "Points" > Just the one field > > > • choose the interpolation method - probably best to use > cubic > > • click on the ... next to extent and set it to the layer > extent > > OK > > > • set the pixel size to 5.0 and 5.0 > > OK > > > • click Run > > OK > > > This way you won't have the odd sizes you mentioned. This may give you > a smoother surface in the end as well. > > I started the prozess, but with more than 11 Million points, it seems to > take too long, I am stuck at 50%. Will try later again. > You can always try IDW instead of TIN. Chris
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