Hi,
may be it will be easier to use thhis algorithm: "Add geometry
attributes" ->
https://docs.qgis.org/3.10/en/docs/user_manual/processing_algs/qgis/vectorgeometry.html?highlight=exportaddgeometrycolumns#add-geometry-attributes
best regards
Stefan
Am 30.01.2023 um 14:13 schrieb Igor Oliveira Ribeiro via QGIS-User:
Hi community,
I need your help. I'm using QGIS 3.10.11 with Grass 7.8.4. I'm
building a QGIS modeler and I want to calculate the area of an input
polygon.
So, my input polygon is a vector feature. I tried using a field
calculator ($area) and Advanced Python Field Calculator (Field
"Formula", I used "value = $geom.area() ).
However, nothing is working. When I run the modeler, there is no error
message. But, I'dont have the area calculated either.
Thanks for your help.
--
See our last paper: <https://doi.org/10.1016/j.envpol.2020.114029>
Impact of biomass burning on a metropolitan area in the Amazon during
the 2015 El Niño: The enhancement of carbon monoxide and levoglucosan
concentrations. <https://doi.org/10.1016/j.envpol.2020.114029>
Igor Oliveira Ribeiro
Post-Doc on Regional Climate Change, Vulnerability, Impacts and
Adaptation - Cuomo Foundation/UEA
+55 92 98103 7136 | skype: igorflorestal
Universidade do Estado do Amazonas | Instituto Nacional de Pesquisas
da Amazônia
Visite: www.geoescrita.com.br <http://www.geoescrita.com.br>
<https://www.linkedin.com/in/igoroliveiraribeiro/><https://www.instagram.com/geoescrita/><https://www.researchgate.net/profile/Igor_Oliveira_Ribeiro><http://lattes.cnpq.br/3909691804095045><https://orcid.org/0000-0002-3529-0525><https://www.geoescrita.com.br/>
Think globally, act locally!
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Stefan Giese
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