Like Maurício said, the origin of the "problem" might come from the use of different projections for layer and project.
The buffer tool will use the input layer's units (from the layer's projection), and it will calculate it with precision. On the other hand, the measure tools use the project's Coordinate System units. Due to the differences\distortion between the projections, the values will probably not be the same. If you need the buffers at the project CRS, you should convert the original data to it first. Hope it helped, Alexandre Neto On Thu, Jul 25, 2013 at 2:51 PM, Mauricio de Paulo <mauricio....@gmail.com>wrote: > I'm guessing here, but are you using on the fly projection? I'm not > entirely sure if the buffer works on the displayed projection or the > layer's projection, but I'm guessing that it's in the layer's. > All the best, > Maurício de Paulo > > On 07/25/2013 10:09 AM, > qgis-user-request@lists.osgeo.**org<qgis-user-requ...@lists.osgeo.org>wrote: > >> Message: 1 >> Date: Thu, 25 Jul 2013 11:44:08 +0200 >> From: "Koning, Bart" <b.kon...@vrzw.nl> >> To: <qgis-user@lists.osgeo.org> >> Subject: [Qgis-user] Buffersize circa 0.666 >> Message-ID: >> >> <1AA138CF303B78408EC8F0F30EEF4**58c0491e...@rbzw-srv10.rbzw.nl<1aa138cf303b78408ec8f0f30eef458c0491e...@rbzw-srv10.rbzw.nl> >> **> >> Content-Type: text/plain; charset="us-ascii" >> >> >> Dear all, >> When adding a buffer to a centroid (VECTOR --> GEOPROCESSING TOOLS --> >> BUFFER(S)), the size of the buffer is circa 0.666 * smaller than I >> expect. E.G. Buffersize input 100, results in a 66,67 m buffer. >> I now must multiply the real buffersize by 1.65 to get the desired >> result. >> Who knows what the problem is? >> Kind regards, >> Bart Koning >> >> > ______________________________**_________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/**mailman/listinfo/qgis-user<http://lists.osgeo.org/mailman/listinfo/qgis-user> >
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