[OSM-talk] tagging and rendering highways in the USA and elsewhere
Frederik Ramm
frederik at remote.org
Fri Apr 18 19:10:29 BST 2008
Hi,
> Who decides what colours are used on the main maps? I.e. who actually
> decided that motorways should be blue, and trunks should be green, how
> railways are rendered etc.?
>
> Say I'd like to see railways rendered differently in the t at h maps, where
> should I ask? Is there some "formal" process like for accepting new
> tags where general agreement is formed?
The t at h maps are computed based on stylesheets that are in SVN, so
anybody can change them. It usually takes a while until a change is
visible everywhere because (1) not all tiles are rendered anew after a
style change, and (2) not all renderers update their styles every day.
We don't have a formal process to decide nor are there written rules.
The unwritten rules are probably roughly:
1. Don't break the styles
2. If you add something that affects only a small number of tiles,
say because you started to tag historic battle sites and want a
little marker there at the highest zoom level, just do it - if
people are unhappy, they can still change it and re-render
3. If you want to change something big, then discuss it on the t at h
list. It's no use pushing through a change that would lead to
half of the renderers simply refusing to update ;-)
4. Big changes like a different colour for highways are a bit
difficult since very many tiles have to be rendered, and the map
will be a patchwork of old and new tiles for quite a while.
Bye
Frederik
--
Frederik Ramm ## eMail frederik at remote.org ## N49°00'09" E008°23'33"
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