[Imports] Large scale building edits in Fiwila, Zambia

[Martin Koppenhoefer]

sent from a phone

> On 11. Jun 2017, at 15:45, Bjoern Hassler <bjohas+mw at gmail.com> wrote:
> 
> 1. I've already marked 3200 buildings as nodes, traced from DG premium in JOSM. No other sources will be used.
> 
> 2. I have a JOSM script that will expand the nodes into small square buildings and add a source tag, showing that the building was generated rather than traced. About 90% of the buildings will be quite correctly captured by this as they are often round or nearly square huts. For the reminder, the buildings will need to be expanded by about 30% and/or reoriented (see 3). E.g. in comparison with the Akros data import in the region, this process really compares favourably.
> 
> 3. After the upload, we'll review the 200 or so buildings that need fixing. These will be small fixes as explained above.


I think it would be better to trace actual building outlines rather than generate generic placeholders from single nodes, better have fewer buildings but actually traced. Besides size there is also orientation and shape that matters for a good representation, as well as the relationship with surrounding buildings (attached or not, in line or not, etc.) neither of which can be captured with the procedure you describe. Imho you shouldn't do it.


Cheers,
Martin