MapCSS is a stylesheet language for maps. It works just like the CSS you'd use for web design.

Take vector data from OpenStreetMap or a similar source; add a MapCSS stylesheet; feed it into a renderer - and you have a beautiful custom map.

See an introduction to MapCSS.

Resources

• MapCSS current specification
• MapCSS mailing list
• MapCSS wiki

MapCSS renderers

• Ceyx (Python): project page
• Halcyon (ActionScript 3/Flash): project page
• Halcyon PDF (ActionScript 3/Flash): github
• Kothic (Python): project page, examples
• Kothic JS (JavaScript/HTML5): project page, example

Other MapCSS libraries and utilities

• Komap (Python), converts MapCSS to Mapnik: project page
• mapnik2mapcss (Perl), converts Mapnik to MapCSS: github
• mapcss_ruby (Ruby), parser: github

Other programs supporting MapCSS

• JOSM (Java), editor for OpenStreetMap data: project page
• Potlatch 2 (ActionScript 3/Flash), editor for OpenStreetMap data: project page

Doing something cool with MapCSS? Tell the mailing list!