[OSM-dev] determining the boundaries of cities?

[Martin Koppenhoefer]

2012/5/31 Eric Marsden <eric.marsden at free.fr>:
>>>>>> "sp" == Stephan Plepelits <skunk at xover.htu.tuwien.ac.at> writes:
>
>  > I don't think we have something like that, as - see above - the big
>  > question here remains: what is an urban area and what is a rural one?
>
>  sp> Statistics Austria provides maps with "urban areas" for Austria. Their
>  sp> definition, either:
>  sp> - a built-up area with cleary visible road classification
>  sp> - a group of houses sharing a place name
>  sp> - a group of houses where the distance between each house is less than 200m
>  sp> (Statistics Austria 2010, p. 1023).
>
>  This is an interesting definition, and in areas where building
>  outlines have been imported into OSM, some automated work to identify
>  such boundaries would be possible.


but as he wrote:
"It gets more complicated: Only houses will be counted, where:
- at least one people has a principal or secondary residence
- and at least four neigbours in 200m distance
- no objects with agriculture use
- also all objects which are registered as workplaces
(Statistics Austria 2010, p. 1025)"

you would have to do additional analysis.

cheers,
Martin