Hi,
Multi-part geometries can complicate things. The best way is to use
Vector/Geometry tools/Multipart to Single part. You can also try the
zonal statistics module found in the processing toolbox.
Nicolas
On 2021-02-25 8:43 a.m., Giacomo Uguccioni wrote:
A warm greeting to all,
I ask you for help.
I have to fill a column of a shapefile (which I believe is a
multi-part geometry but I have to verify) with the Z (elevation)
information.
I would like to ask for the elevation from an online DEM resource,
relying on the coordinates of the feature, but for now I am happy to
be able to query a dem that I load in the same qgis project.
The raster_value function does not work with multi-part geometries (it
returns NULL), while the sampling raster values algorithms create a
new layer, fact that must not happen for other reasons related to the
sharing format of the qgis project.
Can you give me some suggestions or some solutions? thank you so much
--
*Giacomo Uguccioni*
*Geospatial Data Acquisition & Processing*
+39 3920431219
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--
Nicolas Cadieux
https://gitlab.com/njacadieux
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