[Qgis-user] [Modeller] How to calculate area in the graphical modeler of QGIS

[Alexandre Neto]

Hello Igor,

Can you please explain what settings you have used in the field calculator
dialog. A screenshot would be helpful.

Alexandre Neto
User Support
alexandre.neto at qcooperative.net
www.qcooperative.net
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Igor Oliveira Ribeiro via QGIS-User <qgis-user at lists.osgeo.org> escreveu no
dia segunda, 30/01/2023 à(s) 13:14:

> 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
>
> <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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-- 
Alexandre Neto
User Support
alexandre.neto at qcooperative.net
www.qcooperative.net
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