This is an OpenStreetMap map style, created as CartoCSS map stylesheets and converted to a Mapnik XML using the carto command.
Its design is inspired by printed German road atlantes (ie Reise- or Straßenatlas) from the late 1990s -- early 2010s, especially favouring the blue diamond gas station variety last published afaik ca 2013 by Busche.
The implementation is inspired and based on OpenStreetMap Carto and OpenStreetMap Carto German. It was mostly created using TileMill.
It is available in zoom levels 7--12, with a change from a Europe-scale to a Germany-scale detail level happening at zoom level 10. Since the main idea behind the project is to use it to print an actual road map, eg using Open City Street Map or OSM-Atlas, it may not provide the features usually available from slippy maps.
The mapstyle can be used with a database as set up for openstreetmap-carto, but requires some tweaks (some additional views, functions and indexes). Additionally, some data must be downloaded from Wikidata.
This is achieved by running
./apply-db-tweaks.sh gis
./places.sh gis
./generate_shapefiles.sh gis
The custom indexes are contained in indexes2.sql.
The custom functions are defined in postgis_functions.sql.
We download population data for German municipalities from wikidata, store them in the table xxx_municipalities. This information is then used to create a view xxx_places as well as polygons for densely populated city areas (>30000 inhabitants) in simplified_city_landuses.
To reduce some repeated queries to the database, landuse polygons and places are exported from the database to shapefiles.
The relevant views are created via forests.sql and simplified_city_landuses.sql as well as municipalities.sql.
- fix the shield and dash issues for proposed motorways
- find a better way to deal with regions, forests and mountain ranges
- possibly add prominent peaks
- add more shields from neighbouring countries
- improve the database queries for efficiency
- possibly tweak the database by adding further columns to certain tables to use less hstore columns