Matthew,
The documentation(1) says "The result layer contains features whose
geometries represent areas that are either in the input layer, in the
method layer, or in both.". I assume you a polygon in the input layer B
which has a common singular point and common area with a polygon in layer C.
Ari
(1) http://gdal.org/classOGRLayer.html#adf0598c7dab1f4dbe3e2735e27450c9c
On 12.02.2018 11:58, Matthew Snape wrote:
Hello,
I am performing a union of two layers using OGR from Python…
layerA.Union(layerB, layerC,["PROMOTE_TO_MULTI=YES",])
This returns a layer composed of multipolygon’s except for a single
geometrycollection in the form…
GEOMETRYCOLLECTION (POINT (2610469.66 3325023.52),POLYGON
((2610439.3657 3325014.925899999……….
Is this expected behaviour, and if so what is it showing?
Any help appreciated
Thank you.
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