[Imports] RFC: LA County building import (Los Angeles, California, USA)

[Christoph Hormann]

On Monday 21 March 2016, maning sambale wrote:
>
> wiki updated:
> https://wiki.openstreetmap.org/wiki/Los_angeles,_California/Buildings
>_Import#Import_Data

I still miss several of the points i mentioned earlier, in particular:

- Tagging still looks vague.  What you have on 
https://github.com/osmlab/labuildings/blob/master/README.md is just a 
list of OSM keys to use but there is no information on the values - 
like what set of values is to be used for building/building:use/amenity 
and what units/reference system are used for numerical values.  This 
will need to be in the wiki and not just somewhere in the code so 
mappers can later look up how certain tags were generated.
- Positional accuracy and actual compliance of the data with OSM mapping 
practice are still unclear.  You observe offsets in 
https://github.com/osmlab/labuildings/issues/43#issuecomment-194957204
but make the assumption the data to import is accurate.  This is highly 
questionable.  With that volume of data and the connected amount of 
work it would be highly advisable to check it in a few places at 
least - if necessary sending out someone with a high precision GPS.  
Also important to check is for example if overhanging roofs, carports 
etc. are classified as buildings since these are not buildings within 
OSM.

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