[mapserver-dev] bug in WFS writer?

[Bart van den Eijnden (OSGIS)]

Okay, I found it already:

http://trac.osgeo.org/mapserver/changeset/7164

Best regards,
Bart

Bart van den Eijnden (OSGIS) wrote:
> Hey Steve,
>
> Do you remember the bug number or changeset for that point-in-polygon 
> fix? It sounds like it could be the culprit indeed.
>
> You're right it could be a problem in TatukGIS theoretically, but in 
> this case things were checked also in ArcGIS. So it would be strange 
> for 2 clients to have it wrong, though still possible.
>
> Mapserver version: 4.10.2.
>
> I haven't got the source data as yet (it's in Oracle Spatial), but 
> I'll try to get it.
>
> Thanks.
>
> Best regards,
> Bart
>
> Steve Lime wrote:
>> Couple of questions:
>>
>>   - how are you defining a "problem", based on TatukGIS's rendering 
>> or some other method? I'm not saying there isn't a problem but how do 
>> you know it's not a problem with the renderer?
>>   - do you have the source data (a shapefile?) available for testing?
>>   - what version of MapServer?
>>
>> I recall another bug recently similar to this. It had to do with the 
>> MapServer point-in-polygon being indeterminate when a point in one 
>> part is on a polygon edge. The function is key to determining inner 
>> and outer rings. I thought I fixed it though, at least in SVN. Since 
>> a legal polygon can only share 1 vertex with an edge I updated the 
>> code to check at least 2 and one more to break the tie if one 
>> happened to be on an edge. That worked in any testing I had done.
>>
>> Steve
>>
>>  
>>>>> On 3/19/2008 at 1:16 PM, in message <47E15866.2010407 at osgis.nl>, 
>>>>> "Bart van den
>>>>>         
>> Eijnden (OSGIS)" <bartvde at osgis.nl> wrote:
>>  
>>> Hi list,
>>>
>>> it seems Mapserver WFS has a problem with geometries having a 
>>> (common) point in them which touches the geometry itself. Mapserver 
>>> WMS seems to draw these polygons okay.
>>>
>>> An example (look for instance at the second and third geometry):
>>>
>>> WMS:
>>> http://www.osgis.nl/download/umn/wms.png
>>> WFS in TatukGIS (screendump):
>>> http://www.osgis.nl/download/umn/tatuk.png
>>> WFS xml file:
>>> http://www.osgis.nl/download/umn/wfs.xml
>>> Any ideas what could be causing this? Does this ring a bell to anyone?
>>>
>>> Best regards,
>>> Bart
>>>     
>>
>>
>>
>>   
>
>


-- 
Bart van den Eijnden
OSGIS, Open Source GIS
bartvde at osgis.nl
http://www.osgis.nl