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List: qgis-user
Subject: Re: [Qgis-user] Maximum value - attribute table
From: j.huber () post-ist-da ! de
Date: 2020-05-23 19:51:08
Message-ID: 75cfdf52-48cd-bbd7-cc51-3b23c807a4cb () post-ist-da ! de
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Hi,
if the data is likely to change frequently, you might want to add a
virtual field. Thus, the MAX_AREA would always be up to date.
https://docs.qgis.org/3.10/en/docs/user_manual/working_with_vector/attribute_table.html?#creating-a-virtual-field
Regards
Jochen
Am 20.05.20 um 00:09 schrieb Riccardo D'Alvito:
> Hi!
> I would like to have information about a problem that I have.
>
> In the attribute table I have three columns: COUNT which indicates the
> name of the selected polygon, AREA_1 and AREA_2 which are two
> different area values.
> I would like to create a column called MAX_AREA that gives me the
> maximum value between the two AREA_1 and AREA_2 values relating to the
> same polygon.
>
> Thank you,
>
> Regars
>
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<div class="moz-cite-prefix">Hi,</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">if the data is likely to change
frequently, you might want to add a virtual field. Thus, the
MAX_AREA would always be up to date.</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix"><a class="moz-txt-link-freetext" \
href="https://docs.qgis.org/3.10/en/docs/user_manual/working_with_vector/attribute_tab \
le.html?#creating-a-virtual-field">https://docs.qgis.org/3.10/en/docs/user_manual/working_with_vector/attribute_table.html?#creating-a-virtual-field</a><br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Regards</div>
<div class="moz-cite-prefix">Jochen<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Am 20.05.20 um 00:09 schrieb Riccardo
D'Alvito:<br>
</div>
<blockquote type="cite"
cite="mid:DB6P18901MB0215BCD89CFFE2E4A82623769FB90@DB6P18901MB0215.EURP189.PROD.OUTLOOK.COM">
<div>
Hi!</div>
<div>
<span>I would like to have information about a problem that I
have.</span><br>
</div>
<div>
<span><br>
</span></div>
<div>
In the attribute table I have three columns: COUNT which
indicates the name of the selected polygon, AREA_1 and AREA_2
which are two different area values.</div>
<div>
I would like to create a column called MAX_AREA that gives me
the maximum value between the two AREA_1 and AREA_2 values
relating to the same polygon.</div>
<div>
<br>
</div>
<div>
Thank you,</div>
<div>
<br>
</div>
<div>
Regars</div>
<br>
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