When I validate or go searching for untagged ways I quite often come across
a building mapped two or three times its actual size.
If its important for estimating population etc perhaps this could be
mentioned in the instructions for the project.
For the moment I'm just adding building=yes tags.
For almost everything HOT does, and really OSM in general alignment is
really not that big of a deal. Today, almost any imagery we get access
to is aligned to within at most 10 meters (and lots of it is within 2 or
3 meters) of reality and in sparsely populated areas a few meters offset
is not a
I often see that other mappers don't align the background imagery. I am
wondering how a big deal this is.
Aligning the imagery in tasks like the malaria elimination projects is
difficult, if the square does not contain any data (and no gps traces).
I do it (in JOSM) by clicking some points of
