[Talk-GB] building shapes from OS Street View

Andy Allan gravitystorm at gmail.com
Mon Apr 5 18:37:46 BST 2010

On Mon, Apr 5, 2010 at 5:57 PM, TimSC <mapping at sheerman-chase.org.uk> wrote:
> I guess the questions we have to address are: "is
> this data worth having in OSM?"


> "are there any better sources of
> building outline?"

OS Mastermap. But since we won't get access to that any time soon....

> If we do want this data, it seems to be only available as a raster
> layer.

Yes. So we can trace the areas that we're working on, like we've been
using Yahoo!

> Converting raster map data to vector data is non trivial but I think it
> is achievable.


> The building colour in the raster map seems to be unique.
> The raster maps could be selected by colour, vectorised and simplified
> (to remove redundant nodes).

.... aaahh....

> Buildings could be
> imported

... No. No no no no a thousand times no.

> Any general thoughts on buildings and imports?

Don't import stuff. I'll be happy to see you import things that you
are willing, personally, to maintain and update, and I'd prefer you
imported using Potlatch or JOSM and used the Street View, Yahoo, GPS
and local knowledge all mixed in as your sources. But no bulk imports
of automatically generated buildings please.


More information about the Talk-GB mailing list