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well thanks a lot, problem solved :)<br><br><div><br><b><span class="ecxApple-style-span" style="font-family:arial;font-weight:normal;font-size:small"><b>Frederick Löbig</b><br>Röderichstraße 59<br>60489 Frankfurt am Main<br>---<br>E:: <a href="mailto:Frederick.Loebig@grunsnid.de">Frederick.Loebig@grunsnid.de</a><br>P: +49 (0) 69 - 78 99 52 41<br>M: +49 (0) 174 - 70 89 296<br>---<br><b>Office:</b><br><b>euNetworks GmbH</b><br>Ludwig-Landmann-Straße 405<div>60486 Frankfurt am Main</div><div>P: +49 (0) 69 - 90 554 - 532<br>E: <a href="mailto:Frederick.Loebig@eunetworks.com">Frederick.Loebig@eunetworks.com</a><br>S: floebig<br><br>This email and any attachments may contain confidential and/or legally privileged information. If you are not the intended recipient, please delete the email without reading it and notify the sender.</div></span></b></div><br><br><br><br>> Date: Sun, 5 Dec 2010 20:04:55 +0100<br>> Subject: Re: [Qgis-user] FW: Again a problem with legth<br>> From: goyodiaz@gmail.com<br>> To: frederick.loebig@grunsnid.de<br>> CC: qgis-user@lists.osgeo.org<br>> <br>> 2010/12/5 Frederick Löbig <frederick.loebig@live.de>:<br>> > Hey list...<br>> > I again have a problem with analyzing vector-data:<br>> > I have a Polyline-Shapefile with EPSG:900913 Projection. I know, by<br>> > measurements through Google Earth, that the total length of this line should<br>> > be 1000m.<br>> > I used the qGIS Ruler-Tool and checked that with "on the fly transf." on and<br>> > it was 1000m as well. After that, I used the field-calculator and the<br>> > $length-parameter in a "real"-field, but somehow it gives me out 1529.508<br>> > (m??)...<br>> <br>> I can confirm this in trunk. The problem seems to be projection<br>> dependant as it does not happen using EPSG:23030. I guess you can get<br>> correct measures by reprojecting your shapefiles into a suitable UTM<br>> srs (you may have to change the project crs too, I did not test this).<br>> Far from ideal but it can help you to get the work done.<br>> <br>> Goyo<br>> _______________________________________________<br>> Qgis-user mailing list<br>> Qgis-user@lists.osgeo.org<br>> http://lists.osgeo.org/mailman/listinfo/qgis-user<br> </body>
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