[OSM-talk] why does mapnik not display my circles?

[Kenneth Gonsalves]

On Tuesday 17 Nov 2009 6:50:16 am Frederik Ramm wrote:
> > all that is done, there is a food column and there are returns as to
> > 'select  where food is nveg'
> 
> Then maybe you really want to play with what Richard Mann hinted at - 
> perhaps your circles are overlapping other stuff and that's why Mapnik 
> chooses to omit them (easy to test it - put a node tagged food=nveg 
> somewhere in the desert!).

already did that - soon as I get the updated data I will check if it works - 
only do not blame me if you look for sausage there and and find nothing ;-)
> 
> Maybe you even have a problem where the circle conflicts with the 
> restaurant/shop icon itself, then it might never get drawn at all.
> 
> If that's the problem, there are three things you can do -
> 
> 1. change the order in which things are drawn (circles first, then rest 
> of map?)
> 
> 2. use "allow_overlap='yes'" in your <BlahSymbolizer> tag. Not all 
> Symbolizers have it I believe but PointSymbolizer definitely has it.
> 
> 3. use the "clear_label_cache='on'" attribute in your <Layer> tag. This 
> will clear the collision boxes for text (and possibly icons - try it 
> out) and start as if the map was empty (so it also affects later layers).
> 
> One of these is bound to work ;-)
> 

will try all these out and revert - thanks for the tips

-- 
regards
Kenneth Gonsalves
Senior Project Officer
NRC-FOSS
http://nrcfosshelpline.in/web/