[Qgis-user] Centroid error

[Bernd Vogelgesang]

Hi Paddy,

i doubt that you can set a "tolerance" somewhere.
As a general hint: use functions provided by SEXTANTE-plugin/Processing.  
Most of the time, they perform much better than the standard ftools  
functions, and you don't litter your project with tons of test-files as  
the output is always only temporary.
For centroids, there is a function in SAGA for this.

Besides that, with 17.000 polygons,it's quite likely that there are some  
topology errors. Maybe thats also a possible reason for malfunctions (just  
guessing).

Greetz
Bernd


Am 01.09.2013, 17:34 Uhr, schrieb Pat Brown <mistyhaven at gmail.com>:

> Hi List,
> I have a layer of around 17000 polygons, for which I want to derive the
> centroid. Using the Vector/Geometry Tools/Polygon Centroid tool the  
> process
> progressed to around 45% when this message came up: "Error processing
> specified tolerance. Please choose larger tolerance". Can anybody tell me
> why this occurred and how does one set a larger tolerance?
>
> Thanks,
>
> Paddy


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