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Hey list... <div><br></div><div>I again have a problem with analyzing vector-data:<div><br></div><div>I have a Polyline-Shapefile with EPSG:900913 Projection. I know, by measurements through Google Earth, that the total length of this line should be 1000m. </div><div>I used the qGIS Ruler-Tool and checked that with "on the fly transf." on and it was 1000m as well. After that, I used the field-calculator and the $length-parameter in a "real"-field, but somehow it gives me out 1529.508 (m??)...</div><div><br></div><div>I've tried to detect a pattern in the differences between the attribute-table and the ruler results, but i didn't find any. </div><div><br></div><div>I need to mesaure the exact length of polylines to analyze data-loss in subterrain-cables...</div><div><br></div><div>I really hope you can tell me how to fix that problem.. If you need any further Information:</div><div><br></div><div>qGIS 1.5.0</div><div>Project-SRS: EPSG:900913</div><div>Shapefile-SRS: EPSG:900913</div><div>On the fly transformation: ON</div><div>Measure-Spheroid: WGS84</div><div><br></div><div>Thank you in advance..</div><div><br></div><div>Regards,</div><div>Freddy<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><div style="z-index:-1;top:0px;left:0px;width:100%;height:294px"></div><br><br></div></div><div style="z-index: -1; position:absolute; top:0px; left: 0px; width: 100%; height: 1036px;"></div> </body>
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