On Thu 2017-06-22 09:41:47, Christoph Hormann wrote: > On Tuesday 20 June 2017, CARLOS A. DUARTE wrote: > > > > > > Then, I compared the existing information in OSM with the official > > > municipal boundaries shapefile from Guatemala (from National > > > Geographic Service) and I found that most of the existing polygons > > > are different to the official polygons, so I am exploring the idea > > > of replacing all the polygons with the official shapefile. > > A general reminder here: > > If boundary data comes from official sources that does not imply the > data precisely documents the boundary as surveyed/defined. On the > contrary the vast majority (in my experience 80-90 percent) of > administrative boundary data sets published by official institutions > are either simplified to some degree or represent > approximations/estimations of some kind.
Whereas 99% of data in openstreetmap are approximations/estimations of
some kind. It cuts both ways, and in this case I'd expect "official"
data to be more accurate.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
signature.asc
Description: Digital signature
_______________________________________________ Imports mailing list [email protected] https://lists.openstreetmap.org/listinfo/imports
