<div dir="ltr"><div>Great!! The virtual fields are the solution.<br></div>Thank you!!<br></div><div class="gmail_extra"><br><div class="gmail_quote">2016-02-10 11:50 GMT+01:00 Bernd Vogelgesang <span dir="ltr"><<a href="mailto:bernd.vogelgesang@gmx.de" target="_blank">bernd.vogelgesang@gmx.de</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
<div text="#000000" bgcolor="#FFFFFF"><div>Ahhh,</div><div>now I finally got what those virtual fields are good for! Great!</div><div>The non-noob way of achieving this so far was e.g. to use a SpatiaLite db and create triggers there. See <a href="http://gis.stackexchange.com/a/86470" target="_blank">http://gis.stackexchange.com/a/86470</a></div><div>This would then be a permanent solution.</div><div><br></div><div>Cheers</div><div>Bernd</div><div><div class="h5"><div><br></div><div>Am 10.02.2016, 10:53 Uhr, schrieb Piotr Kania <<a href="mailto:p.kania@op.pl" target="_blank">p.kania@op.pl</a>>:<br></div><br><blockquote style="margin:0 0 0.80ex;border-left:#0000ff 2px solid;padding-left:1ex">
Here it's nice info:<br>
<a href="http://www.northrivergeographic.com/archives/qgis-2-6-virtual-fields" target="_blank">http://www.northrivergeographic.com/archives/qgis-2-6-virtual-fields</a><br>
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<div>W dniu 2016-02-10 o 10:18, Josefine
Petrenz pisze:<br>
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<div>hej hej,<br>
<br>
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at first, I would like to apologize for my english.<br>
<br>
I have a shape-file with several areas. In my attribut
table, each area has an information about the area size.<br>
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Step by step the areas become bigger or smaller. Every time,
when this happened, i have to recalculate the area size. is
there a way, that the area size correct automatically in the
attribute table, when i change the area?<br>
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thanks in advance<br>
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josi <br>
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<br>
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</blockquote><br><br><br></div></div><div><div>-- </div><div>Bernd Vogelgesang<br>Siedlerstraße 2<br>91083 Baiersdorf/Igelsdorf<br>Tel: <a href="tel:09133-825374" value="+499133825374" target="_blank">09133-825374</a></div></div></div><br>_______________________________________________<br>
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