Hi Nate, that's very helpful - many thanks!
Bjoern On 17 May 2017 at 10:00, Nate Smith <[email protected]> wrote: > Hi Bjoern - Based on my experience working on that import with Akros, I > would say that matching the DG imagery is best. Bing and DG imagery was > used for the original creation of the data before it was imported. The > offset varied quite a bit across the region and DG was much better. > > Nate > > > Nate Smith > @nas_smith <https://twitter.com/nas_smith> > > On May 17, 2017 at 2:43:19 AM, Bjoern Hassler ([email protected]) wrote: > > Dear all, > > I'm looking at this buildings import, > https://wiki.openstreetmap.org/wiki/Northern_Zambia_Buildings_Import > > For the buildings It includes buildings near Fiwila, -13.9710, 29.6019, > Zambia. > > As well as East (e.g. -13.9762965, 29.5746642) and West (e.g. -13.970185, > 29.6203484) of Fiwila. > > In Fiwila, the import matches Bing/DG imagery, and the road matches those > too. Hwoever, East and West, there is a clear offset of about 20m East-West. > > The wiki page doesn't say how the data was collected. The wiki page states > "The main goal of this work is to not only do a large import of buildings > (268k records) into Zambia, but set an example for how Akros and other > organizations can *use field based operations* to contribute back to > OpenStreetMap. *Data was verified by Akros Global Health contributors > with assistance from the USAID GeoCenter's Remote Sensing Program*." (my > bold). > > So any thoughts on whether I should go by the Akros data (and offset > Bing/DG) or whether I should adjust the Akros import (in that area) to > match bing? > > Many thanks! > Bjoern > > > _______________________________________________ > Imports mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/imports > >
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