Hi Andi in inasafe i do something similar [0]
Please be warned that it is in the messyest part of our code :)
Ciao
[0]
https://github.com/AIFDR/inasafe/blob/master/safe_qgis/impact_statistics/aggregator.py#L1046
Hi,
I am trying to union selected geometries in a layer into one geometry. A
Try the QgsGeometry::combine() method.
http://www.qgis.org/api/classQgsGeometry.html#a63244d3435cc99794b82a6cbd0af0eb5
Quoting class doc
*Note:*this operation is not called union since its a reserved word in C++.
On Sat, Oct 5, 2013 at 8:07 AM, gene martin.lal...@gmail.com wrote:
I also do
Finally, I found the solution: it is
*geom.combine(another_geom)* and not union, why ?
gLine = QgsGeometry.fromPolyline( [ QgsPoint(1,1), QgsPoint(2,2) ] )
gLine2 = QgsGeometry.fromPolyline( [ QgsPoint(1,2), QgsPoint(2,1) ])
gLine2.combine(gLine).exportToGeoJSON()
u'{ type:
Ok, the reply is
this operation is not called union since its a reserved word in
C++.
Thanks to Daniel-2, we post at the same time.
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Sent from the
Hi Daniel,
Thanks - this should do the trick! And it explains why I did not find
Union.
Will try on Monday when I am back in the office.
Andreas
Am 05.10.2013 11:55, schrieb Daniel:
Try the QgsGeometry::combine() method.
Hi,
I am trying to union selected geometries in a layer into one geometry. A
multpolygon as a result would be fine if the selected polygons aren't
contiguous.
I did not find a union command in the API. How can I do this from Python?
Thanks a lot for any hints!
Andreas
