Where might I find “basics about OSM tags,” or a discussion of how map data is organized in OSM?
For two examples,
(1) generally a feature has both geometrical info (lat/long) and also semantic info (tags);
(2) Also in OSM one cannot (or at least usually does not) describe a feature with two tags that have the same key,
e.g. one should not tag a feature with both highway=primary and highway=motorway_link
I imagine someone has written these down somewhere. But where?
Sorry if this question is a bit ambiguous… I realize explanations may not all be in one place.
Thanks,
Steve