tilemill:
- uses millstone to localize datasources upon adding a layer
- uses carto to compile the stylesheets with the localized datasources
- uses tilelive/tilelive-mapnik to render maps and grids
millstone:
- takes MML/JSON file and localizes all datasource references
- resulting MML/JSON files with local path references is returned
carto:
- takes MML/JSON file with embedded or referenced carto .mss files
- compiles carto stylesheet to XML objects
- outputs Mapnik/XML file
tilelive-mapnik:
- takes Mapnik/XML file and passes it directly to Map constructor:
- reads MML/JSON file with the same basename in the same directory to determine settings. if it doesn't exist, there'll be no interactivity and the center is estimated from the bounds.