On Sun, Dec 12, 2010 at 10:20 AM, Dane Springmeyer <[email protected]>wrote:

>
> Given that your rendering generally looks good, I'd assume the difference
> you are seeing is simply a difference in the data, not your mapnik install
> or your stylesheet.
>
> If you grabbed your data from cloudmade, it may be a week or two behind,
> and this change could be making the difference:
>
> http://www.openstreetmap.org/browse/changeset/6559377
>

I hadn't considered this - thanks!


> Re: a doc/wiki/etc explaining the OSM map style... well, the osm.xml is
> enormous and complicated. I think the best way to learn how it works is not
> study it, but the pieces that make it up -  so topics like Mapnik Layers,
> PostGIS datasource parameters, Zoom-dependent rules (min/max scale
> denominators), and how styles are attached to layers. The kind of pieces of
> info that should be linked from here:
> http://trac.mapnik.org/wiki/LearningMapnik if they are not already.
>

Just to be clear, I'm probing the osm.xml file more than studying it ->
modify-render-learn-modify-render-learn, etc

I'm currently having problems where TextSymbolizers are getting clipped at
tile boundaries (label shows up on one side but not the other) if you have
any ideas.  I've tried playing with TS min_distance, spacing, avoid_edges,
etc but no luck yet

That said, for a first cut to understand how the elements of the osm.xml
> work: like layer ordering, which styles do text, casings, or features, and
> how the heck to find a rule that renders something... the most useful thing
> for me has been the mapnik viewer:
> http://trac.mapnik.org/wiki/MapnikViewer
>
> It is not terribly easy to build, but in trunk I've been working on making
> it slightly easier.
>
> Let me know what platform you are on and I can advise a bit more on how to
> get it running.
>

This looks immensely useful for the graphic design... I'm generating on OS X
Snow Leopard.

Thanks again!

Kevin
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