On Mon, Nov 9, 2015 at 6:40 PM, Andy Wilson <[email protected]>
wrote:

> 3. Efficiency. There are enough buildings in OSM already and as Martin
> pointed out, comparing them individually and properly merging tags, etc
> would be time consuming.


JOSM has a "Replace Geometry" tool found in the Util2 plugin that makes it
easy to merge old and new. Each building will have to be reviewed
individually. In some cases, the building in OSM might be newer but lacking
address information. In that case the address information will need to be
copies from the import to the existing building. It's harder, but with 3
year old data it is likely to occur.

Clifford


-- 
@osm_seattle
osm_seattle.snowandsnow.us
OpenStreetMap: Maps with a human touch
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