[Tilesathome] Defect rendering of houses as triangles

[Martin Garbe]

On Fri, May 15, 2009 at 02:37:18PM +0200, Dirk-L?der Kreie wrote:
> Martin Garbe schrieb:
> > Hi all,
> > 
> > currently we have problems in Rostock with osmarender rendering houses.
> > Often the houses are not completely rendered. Instead of rectangle you
> > see triangles. Lets take an example
> > http://openstreetmap.org/?lat=54.08878&lon=12.11402&zoom=17&layers=0B00FTF
> > In this area you see houses which sometimes are rendered the right way
> > but often wrong. Mapnik is rendering the right way and an example of
> > osmarenders wrong way you can see in
> > http://www.informatik.uni-rostock.de/~mgarbe/osm/ktv_defect_osmarender.png
> > 
> > Is there any explanation for that behaviour?
> 
> This looks like some clients got incomplete data for an area. I'm not
> sure how this could happen. Maybe someone can investigate.
> 

We found out that the defect rendering occurs when rerendering is
requested at priority 2. At priority 1 all data is correctly rendered.
Can anyone imagine a reason for that behaviour?


Martin