[geos-devel] Union of linestrings

Mateusz Loskot mateusz at loskot.net
Mon Feb 29 12:29:29 PST 2016

On 29 February 2016 at 20:10, Sandro Santilli <strk at keybit.net> wrote:
> On Mon, Feb 29, 2016 at 07:18:08PM +0100, Mateusz Loskot wrote:
>> I've started adding tests for OverlayOp [1] and I noticed
>> curious results for basic test case.
>> OverlayOp(UNION) on Four segments of a sqare
>> always construct a MultiLineString.
>> I'd have expected a polygon, shouldn't I?
> No, you shouldn't.
> The union of lines do not yeld an area.
> You can use the Polygonizer class to build polygons
> from linework.

Right. I'll give it a go. Thanks.

Best regards,
Mateusz Łoskot, http://mateusz.loskot.net

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