$length gives the same result as length($geometry)
Michel Van: Springfield Harrison [mailto:[email protected]] Verzonden: vrijdag 18 mei 2018 2:52 Aan: Michel Stuyts <[email protected]> CC: qgis-user <[email protected]> Onderwerp: Re: [Qgis-user] results Measure Tool vs. length() Interesting and alarming observation. And how do those results compare with output from the $length variable? Cheers . . . . . Springfield Samsung Tab 4 On May 17, 2018 5:26 AM, "Michel Stuyts" <[email protected]<mailto:[email protected]>> wrote: In the length() function QGIS uses the CRS unit of the layer to calculate the result. When I use for example a layer in a local CRS like EPSG:31370 or EPSG:5439 and a layer in EPSG:3857 (that all use meters as unit) the results are very different (+40% difference). Changing the project CRS makes no difference. When I check the length using the Measure Tool the results are very similar to the local CRS. How can I measure the length of a line and use it as a label independent from the layer CRS and get results similar to the results of the Measure Tool? Michel _______________________________________________ Qgis-user mailing list [email protected]<mailto:[email protected]> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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