Re: [Qgis-user] Correct the attribute table automatically

[mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Josefine Petrenz Sent: 10 February 2016 09:18 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Correct the attribute table automatically hej hej, at first, I would like to apologize for my english. I have a shape-file with several areas

Re: [Qgis-user] Correct the attribute table automatically

Ahhh, now I finally got what those virtual fields are good for! Great! The non-noob way of achieving this so far was e.g. to use a SpatiaLite db and create triggers there. See http://gis.stackexchange.com/a/86470 This would then be a permanent solution. Cheers Bernd Am 10.02.2016, 10:53 Uhr,

Re: [Qgis-user] Correct the attribute table automatically

Hi, The question is if you need a "physical field" (stored in your data provider) or if a virtual field is good enough. If you don't need physical storage in the table, I suggest you add a virtual field with an expression to calculate the area an potentially also round/format the result.

[Qgis-user] Correct the attribute table automatically

hej hej, at first, I would like to apologize for my english. I have a shape-file with several areas. In my attribut table, each area has an information about the area size. Step by step the areas become bigger or smaller. Every time, when this happened, i have to recalculate the area size. is

Re: [Qgis-user] Correct the attribute table automatically

Great!! The virtual fields are the solution. Thank you!! 2016-02-10 11:50 GMT+01:00 Bernd Vogelgesang : > Ahhh, > now I finally got what those virtual fields are good for! Great! > The non-noob way of achieving this so far was e.g. to use a SpatiaLite db > and create