Hello Igor, I don't have qgis here to test, but...
If I remember well, you need to change the parameter type from value to precalculated value. If not, try adding single quotes around the expression. Good luck, Alexandre Neto A segunda, 30/01/2023, 19:06, Igor Oliveira Ribeiro < [email protected]> escreveu: > Hey Alexandre, thanks for your reply. > See below > [image: image.png] > > On Mon, Jan 30, 2023 at 10:51 AM Alexandre Neto < > [email protected]> wrote: > >> 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 >> [email protected] >> www.qcooperative.net >> [image: www.qcooperative.net] <http://www.qcooperative.net> >> >> Igor Oliveira Ribeiro via QGIS-User <[email protected]> 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! >>> _______________________________________________ >>> QGIS-User mailing list >>> [email protected] >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> >> >> >> -- >> Alexandre Neto >> User Support >> [email protected] >> www.qcooperative.net >> [image: www.qcooperative.net] <http://www.qcooperative.net> >> > > > -- > > 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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