[Tagging] Feature Proposal - RFC - parking (redux)

john at jfeldredge.com john at jfeldredge.com
Sat Mar 19 19:57:22 GMT 2011

If you have a driveway, some parts of which have a secondary lane for parallel parking or diagonal parking, and some sections of which have only a driving lane, how should this be tagged?  This is a common arrangement in parks, from my experience.  In some cases, the parking lane may only be large enough for one or two vehicles.

-------Original Email-------
Subject :Re: [Tagging] Feature Proposal - RFC - parking (redux)
From  :mailto:dieterdreist at gmail.com
Date  :Sat Mar 19 13:12:53 America/Chicago 2011

2011/3/18 Flaimo <flaimo at gmail.com>:
> just relying on a surrounding amenity=parking area without a relation
> also has another flaw: underground parking. basically nobody maps
> underground parking facilities as areas with layer=-1. all of those i
> have seen so far in OSM are mapped as nodes at the entrances. and that
> is the problem. underground parking facilities often have more than
> one entrance. right now, each entrance is interpreted as its own
> parking lot. the relation would group them together to one parking
> facility.

Yes, it can be a possibility (and indeed to group nodes a relation
different then multipolygons is needed), but I'd consider this not the
better approach, as a simple area will be more useful then a relation
with some nodes (and easier to map as it would be "mapping as usual"
instead of "exception"/new relation type). Reasons that the area
currently is not used a lot this might be:
- the exact size and position are not known to the mapper (I'd suggest
to map it approximately, still better then nodes)
- the renderers currently don't support underground buildings in a
nice way (will maybe change in the future), maybe even render them not
distinguishable from surface buildings (which is discouraging).
- documentation in the wiki suggests that a node is sufficient, or is
not very specific. (could be changed)

Btw.: you wrote that "nobody" mapped underground parkings as area with
a layer=-1 but I found that people indeed do it.
I found 90 nodes with parking='underground' (of which 4 with layer=-1)
in my extract versus 40 polygons (of which 15 had layer=-1), so almost
one third of the underground parkings in my region are indeed mapped
as areas.

This is opposite to all amenity=parking (8000 nodes vs 16000 polygons)


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John F. Eldredge -- john at jfeldredge.com
"Reserve your right to think, for even to think wrongly is better than not to think at all." -- Hypatia of Alexandria

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