[Qgis-user] Polygon digitalization

2013-03-15 Thread bertGIS
Hello.

My firm passed under QGis one year ago, and we encounter a problem with the
use of QGis for our botanists.
Indeed they will be confronted with the need of digitizing hundreds of
habitats polygon with correct joins.

Some have tested under QGis Lisboa and the result is discussable because, as
you can see on the attached image, the created polygons (with the option
avoid intersections and topological editing checked) shows some garbage.
Here I have moved one of them and we see the results.

http://osgeo-org.1560.n6.nabble.com/file/n5040680/OSGeo2.png 

Reading the former messages on this subject, I have tested the options of
digitizing polilines with 'traceedit' and poligonize with 'poligonizer', and
the GRASS vector layer. But it is not practical for our experts.

Can you help me about that ?

Thanks
Cheers
Bert



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[Qgis-user] Problem in FTools 0.6.1 union

2012-02-14 Thread bertGIS
Hi.

It seems that the Union tool furnished with QGIS Wroclaw and Ftools 0.6.1
does not manage the union attributes correctly.

Tested with one A layer with an ID attribute with value 125, one B
layer with an ID attribute with value 200 and the two layers (simple
vector layers with only one feature for each one) overlapping on one part.

You make the union. 
After that, you have a resulting layer with 2 fields : ID and ID_2

The attribute table is the following:

 IDID_2
0   125  200 (the overlapping region)
1   125  NULL   (the A only region)
2   125  NULL   (the B only region)

Should'nt the feature number 2 attributes be ('2', NULL, '200').
It seems 0.5.10 Ftools version did not contain this problem.

Cheers,
Bert

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[Qgis-user] Re: Problem in FTools 0.6.1 union

2012-02-14 Thread bertGIS
Ok,

thanks, the revision works fine for the union

Bert

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