## Data sources
- http://download.geofabrik.de/ (countries, continents...)
- http://openstreetmapdata.com/data (land, water, coastline, preprocessed in shapefiles)
- https://www.mapbox.com/tilemill/docs/manual/mapbox-geodata/ (main boundaries, populated places...)
- relief data: http://srtm.csi.cgiar.org/SELECTION/inputCoord.asp
- some cities: http://metro.teczno.com/
- targeted osm data: http://overpass-turbo.eu
- in shp http://www.openstreetmap.re/osm2gis/