[OSM-talk] live rendering

[Artem Pavlenko]

>
>> The next stage is to integrate Schuler's DB layout with Mapnik.
>
> This is going to be a bit tricky, since Mapnik (I think) expects a
> much flatter database structure than the Rails port uses.

PostGIS plug-in expects SF for SQL but we can have a specialized  
'osm' input plug-in reading less flat, more topological data model.
The key is to make sure that bounding box query runs fast and returns  
geometries/attributes in some suitable (for live rendering) format.
I does not have to be WKB.

> I have a
> scheme in mind for mimicking this structure on the fly with a mesh of
> views, rules, and indexes built on procedural functions but I haven't
> tested it and can't yet say how it will perform. Certainly we can
> maintain summary tables with triggers if it comes to that; Christopher
> Schmidt and I have tested this on our own databases and it does work.
>


Artem Pavlenko
http://mapnik.org



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