[Talk-us] Is this a bad import or an experiment?

andrzej zaborowski balrogg at gmail.com
Thu Mar 23 14:25:58 UTC 2017


Hi,

On 22 March 2017 at 19:41, Eric Ladner <eric.ladner at gmail.com> wrote:
> On Wed, Mar 22, 2017 at 1:07 PM Mike N <niceman at att.net> wrote:
>> On 3/22/2017 2:02 PM, Kevin Kenny wrote:
>> > Are small driveways offensive, or is it just the polygonal ones that
>> > don't connect to anything?
>>
>> To me, it's just the disconnected polygons.   Small driveways don't hurt
>> anything, and can only provide information such as telling self-driving
>> cars which driveway to pull into.
>
> Really, any "highway=*" drawn as an outline rather than a center line is a
> problem.   Routers and other processing code expects to follow the way
> segments, not honor its area as somewhere you can drive.

The current most popular tag for this is area:highway I believe and
there's quite a lot of area mapping going on in OSM now, and there are
some potential uses in addition to rendering.  Originally the
highway=* tag plus area=yes was used but that was problematic for
various reasons including confusing routers that don't support the
area mapping (all the popular ones..) and they have been long
retagged.  Note that the area:highway polygons are not supposed to be
connected to the centerlines, only between themselves.

http://wiki.openstreetmap.org/wiki/Proposed_features/area:highway

Unfortunately it looks like someone has started deleting the areas you
found, I looked at a random neighborhood and they were still visible
in the tiles but the map data shows only the small ones, now
unconnected to anything as the bigger ones are missing.  Haven't
looked at the edits history.

Best regards



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