[Talk-us] NYC building details

[Alex Barth]

Colin -

You're essentially describing OpenStreetMap's standards. Of course we don't
have the imagery you used for digitization but we should make at least sure
to stick to tracing footprints, not rooflines. I'll drop the user robgeb
who created the changeset in question a friendly note to make sure he's
seen your message here. He's been a lot of the amazing 3d modelling you can
see in in my last diary post [1] - I'm sure he'll touch many more buildings.

Alex

[1] http://www.openstreetmap.org/user/lxbarth/diary/23588

On Thu, Sep 18, 2014 at 11:12 AM, Reilly, Colin <creilly at doitt.nyc.gov>
wrote:

>  Not sure what the OSM standard for building geometries or if there is
> one. In the case of NYC, the buildings that were provided by NYC DoITT and
> imported to OSM were digitized using imagery of higher resolution than what
> is available to OSM editors (wish we could make the imagery available but
> unfortunately we cannot). In addition, the NYC buildings are digitized to
> the base of the building not to an upper recess.
>
>
>
> We’ve seen editors modifying buildings to lower resolution imagery and to
> upper recesses. See example below where an editor changed the outline on
> the west side of the building to conform to an upper recess of the
> building. Would be nice to figure out a way to prevent degrading the
> fidelity of the building geometries or fixing on a standard. Apologies if
> there already is one.
>
>
>
> http://www.openstreetmap.org/way/250052753/history
>
>
>
> Colin Reilly
>
> Director, Geographic Information Systems
>
> New York City Department of
>
> Information Technology & Telecommunications
>
>
>
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>
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