[geos-devel] CascadedPolygonUnion XML testing

[G. Allegri]

This is the reduced version of the test xml:
http://www.giovanniallegri.it/share/TestUnionMultiPolygon_red.xml

Now it contains only two geometries. It tries to node them but fails,
so a second try is done with the SnapOverlay, but it fails too.
I don't know the algorithm so I'm not able, yet, to say what is failing.

giovanni

2010/6/25 G. Allegri <giohappy at gmail.com>:
> Here is a test xml:
> http://www.giovanniallegri.it/share/TestUnionMultiPolygon.xml
> It's big, but I will reduce it nex time :)
>
> Notes:
>
> 1 - this multipolygon comes from an st_collect on 95 rows in a postgis
> table. The test on it fails with Topology Expection found non-noded
> intersection, because the MP is invalid. I've tested it on jts from
> trunk.
> 2 - I've run a cascadedunion.union operation on a List of the same
> geometries (picked with Geotools directly from the DB). It works fine.
> In this test I've used jts 1.10 shipped with Geotools. I will try it
> agains the trunk version as soon as possible.
>
> Giovanni
>
> 2010/6/25 strk <strk at keybit.net>:
>> On Fri, Jun 25, 2010 at 04:39:17PM +0200, strk wrote:
>>> Martin, is there any support for testing CascadedUnion
>>> with the XML format ? Would help comparing GEOS/JTS.
>>
>> I've found TestUnaryUnion.xml in JTS repository.
>> I guess that's what GEOS should be using
>> for testing CascadedPolygonUnion.
>>
>> Only need to actually port UnaryUnion ...
>>
>> --strk;
>>
>>  ()   Free GIS & Flash consultant/developer
>>  /\   http://strk.keybit.net/services.html
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>