[talk-ch] Map consistency - private floating islands

michael spreng mailinglist at osm.datendelphin.net
Sat Jul 7 11:24:03 CEST 2018

Hi Kai

You can model ways through buildings quite normally. I don't think you
should add tunnel=yes, but indoor=yes or if it is a passage, you can use
and of course add the appropriate access tags if it is private.

For publicly accessible parks (with or without a fee) the entrance
through a house should be modelled. But for private stuff like your
example, don't hesitate to mark it as a false positive and move on.
There is no need, nor is it possible, to map all the private property


On 07/07/18 10:50, Kai Pankrath wrote:
> Hi all,
> I am working on the map quality using https://www.keepright.at (as well
> as http://tools.geofabrik.de/osmi/) and encountered the “floating
> island” problem (ways not connected to the rest of the map). I came
> across one specific situation and can think of another:
>  1. The way is in a private garden and the only access would be
>     “through” the house (physical entering through the main entrance and
>     potentially entering a garden through a terrace door) like here:
>     https://www.keepright.at/report_map.php?zoom=19&lat=47.55724&lon=7.6253&layers=B0T&ch=0%2C130&show_ign=0&show_tmpign=0
>  2. I have not found a good example, but you can think of a park with
>     limited access and entrance as well as exit are only possible
>     through the building (e.g. a castle or museum where you pay a fee to
>     access other areas).
> Basic question: How to map that? I see one option for private ways: I
> would simply add “access=private” and any consistency checker could pick
> that up in the future ignoring “private” islands. For more public-like
> situations I am not so sure. Adding a highway=footway/tunnel=yes
> (+layer?) through the building? Adding properties at the end points of
> the way networks similar to amenity=parking_entrance (+creating a
> relation between these points)? Any suggestions?
> Regards,
> Kai
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