[Imports] RFC: San Francisco building import (San Francisco, California, USA)

[Christoph Hormann]

On Friday 20 May 2016, Brandon Liu wrote:
> Hi,
>
> We are proposing an import of the CC0-licensed building height data
> for San Francisco [0].
>
> This import will not add new buildings - instead, we're conflating
> the available LIDAR height data with existing OSM building
> footprints. The data was collected in 2011 and covers the city/county
> of San Francisco. 161,473 OSM buildings have heights that can be
> derived from LIDAR.

I am not sure this is a good idea - adding data derived automatically 
from remote sensing data in an undocumented process performed by a 
third party without manual review and plausibility checks to the OSM 
database.

Could you

- provide any information you have on the process used for generating 
the height values?
- provide data for a sample area to assess the robustness of the 
process, preferrably of a nasty area (like small buildings with varying 
heights and trees around)?

-- 
Christoph Hormann
http://www.imagico.de/