Contour lines for tile server at home?
I am trying to set up an offline version of OpenStreetMap to use on holidays where internet can be spotty. Following https://switch2osm.org/serving-tiles/manually-building-a-tile-server-14-04/, I have managed to do so.
I am no wondering if there is any "easy" way to add elevation information? E.g. contour lines. My search on the internet has only revealed the guide (http://wiki.openstreetmap.org/wiki/Contours), which seems a bit outdated. For example, it recommends using XML styles and does no. t tell me how to turn it into a carto style. Also I am unsure from it which approach is better Shapefile or PostGIS?
Does anybody know a better guide? Is there a better approach on how to add contour lines?