Hi,
If you are using a geopackage, you are probably getting a message that
the file cannot be saved as geopackage requires a unique id field. You
can open the field calculator and update the field using $id for the
unique ID field. If you delete this unique ID field, it will be
recreated correctly if you delete the field and save the file (if you
save in a geopackage file format). (I guess this also has the potential
to corrupt the file so this would be a last chance option). You can
also use the autoincremental field function found in processing if you
don't have a unique id field.
Nicolas
On 2022-05-11 5:32 a.m., Keith Trees via Qgis-user wrote:
Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
Windows
Hi All
I have two vector polygon layers, soil and native vegetation
respectively. I used vector-geoprocessing tools-Difference to get the
output of the soils that had no native vegetation.
The problem is that there are now multiple polygons that share the
same objectid as they are remnants of an original polygon. This is
repeated through the layer.
How can I renumber the objectids so each polygon has a unique value?
I need to be able to identify each polygon and also calculate its area.
Regards
Keith
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--
Nicolas Cadieux
https://gitlab.com/njacadieux
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