[OSM-talk] routing across open spaces

[Ed Avis]

David Murn <davey <at> incanberra.com.au> writes:

>>Not all park land is walkable - some can be trees or bushes - so some extra
>>tagging is needed.
> 
>Another problem, is that you may not be able to traverse the park in all
>directions.  It may have a fence with only a couple of access gates, or
>you may find that some access gates are suitable for wheeled vehicles
>where other gates may have steps or other obstacles, so you may find
>yourself being routed to a corner of the park which you cant easily get
>out of.

Yes, and at present there is an implicit understanding that only the explicitly
mapped paths are routable - at least where I live.  In London the city parks
have entrance footways added from the street, and where there is no entrance
that usually means there isn't a gate to go in, so by omission there must be a
fence or wall.

But it would be better to map the fence or wall explicitly.  If the routing
engines start to route across grass and park land then it might prompt mappers
to add the missing features.

>You may also find timed access restrictions apply.

Yes, but those can be handled using the usual tags, just as there may be
timed access restrictions for a highway or gate.

-- 
Ed Avis <eda at waniasset.com>