[Imports] Finalizing DC building + address import round 2

Jaak Laineste (Nutiteq) jaak at nutiteq.com
Wed Aug 7 07:20:35 UTC 2013

Hi Alex,

Buildings in DC reminds me that this is the only dataset where I've seen 3D Shapefiles [1] in the wild. Have you considered importing this data to the OSM as Simple 3D  Building [2] schema?

It would not be trivial at all, as you'd need to convert and approximate 3D shapes (triangles / meshes) into parametric height and roof type tags. Common opensource tools like OGR and shapelib does not read the MultiPatch elements, or project them to 2D (e.g. in QGIS you see roofs like [3]), so custom shapefile reader would be needed; but Shapefile format is actually quite simple to read. And then you'd need to do conflation with all the existing data, not only adding tags but also do splitting to building parts.

[1] http://dcatlas.dcgis.dc.gov/metadata/BldgPly_3D.html
[2] http://wiki.openstreetmap.org/wiki/Simple_3D_Buildings
[3] http://grab.by/p8HC


On 07.08.2013, at 2:28, Alex Barth <alex at mapbox.com> wrote:

> Hello everyone -
> I've put together a proposal [1] to finalize the stalled DC building + address import.
> Working with Chris Andino and others in the DC community we've made some good progress over the last couple of weeks. A good first round of reviews on imports-us [3] has yielded great feedback [2] that I'm looking to incorporate it at this weekend's OSM birthday sprint in DC. 
> Please review the proposal below [1] and post feedback here on the list **after checking for existing issues** [2].
> Thank you for your time!
> [1] https://github.com/osmlab/dcbuildings/blob/master/PROPOSAL.md
> [2] https://github.com/osmlab/dcbuildings/issues?state=open
> [3] http://lists.openstreetmap.org/pipermail/imports-us/2013-August/000209.html
> [4] http://osmlab.github.io/birthday-sprint/
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> Imports mailing list
> Imports at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/imports

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