[OHM] OHM's purpose and differences with regular OSM

[PauLL170]

Hi,

you can map whatever you want: any historical objects and also existing
objects, since they exist since a certain time. Of course there are
different "strategies": Some people focus on certain objects (there used to
be a project to map the major roman roads), some people focus on the
complete history of one place including today's objects etc.
The tagging system is indeed identical with OSM. A time slider is still
missing, but as I heard, it is in development. Please remember to add
start_date (and end_date) tags, even if you don't know exact dates (see
https://wiki.openstreetmap.org/wiki/Open_Historical_Map#Tagging). The time
slider will retrieve these tags.

Best regards,
Paul
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