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<p>Noticed that the issue in this thread was specific to geometries containing CompoundCurve geometries. Not sure if you use them?</p>
<p>Andreas</p>
<p>On 2017-07-06 17:16, Neumann, Andreas wrote:</p>
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<p>Hi Morten,</p>
<p>Sounds familiar - see <a href="http://osgeo-org.1560.x6.nabble.com/Area-calculation-issues-td5305669.html">http://osgeo-org.1560.x6.nabble.com/Area-calculation-issues-td5305669.html</a></p>
<p>Perhaps you have an older version of 2.18 without the bug fix? Note that there is now version 2.8.10 with numerous bug fixes since 2.18.3 (which you seem to use).</p>
<p>Andreas</p>
<p>On 2017-07-06 16:38, magerlin wrote:</p>
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<div class="pre" style="margin: 0; padding: 0; font-family: monospace;">I normally use $area in the field calculator to calculate areas of polygon<br /> but now this is really weird.<br /> <br /> I have 5 polygons in the same shape file and tries to calculate the areas -<br /> but two of the polygon get areas of about 100 times as big as they should be<br /> while the 3 remaining polygons get ok areas. If I use area($geometry)<br /> instead I get OK areas:<br /> <br /> <<a href="http://osgeo-org.1560.x6.nabble.com/file/n5326908/Area_Calc.png">http://osgeo-org.1560.x6.nabble.com/file/n5326908/Area_Calc.png</a>> <br /> <br /> According to the field calculator:<br /> $area: The area calculated by this function respects both the current<br /> project's ellipsoid setting and area unit settings<br /> <br /> Area($geometry): Calculations are always planimetric in the Spatial<br /> Reference System (SRS) of this geometry, and the units of the returned area<br /> will match the units for the SRS.<br /> <br /> According to the "Topology Checker" the topology of the polygons are OK.<br /> <br /> The file is here (EPSG: 32634): <br /> Test_Area.zip<br /> <<a href="http://osgeo-org.1560.x6.nabble.com/file/n5326908/Test_Area.zip">http://osgeo-org.1560.x6.nabble.com/file/n5326908/Test_Area.zip</a>> <br /> <br /> <br /> <br /> -----<br /> Regards Morten<br /> <br /> Currently using Qgis 2.18.3 (OSGeo4),<br /> Windows 7, 64bit<br /> --<br /> View this message in context: <a href="http://osgeo-org.1560.x6.nabble.com/Area-Calculations-what-the-h-is-going-on-tp5326908.html">http://osgeo-org.1560.x6.nabble.com/Area-Calculations-what-the-h-is-going-on-tp5326908.html</a><br /> Sent from the QGIS - User mailing list archive at Nabble.com.<br /> _______________________________________________<br /> Qgis-user mailing list<br /> <a href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a><br /> List info: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><br /> Unsubscribe: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user">https://lists.osgeo.org/mailman/listinfo/qgis-user</a></div>
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