[HOT] built-up areas

Kamal P kamalp.paudel at gmail.com
Tue Sep 1 01:33:19 UTC 2015

Hi Dan,

Thanks for pointing out the issues about the built up areas in Nepal. We
did have troubles while trying to digitize with the newer OSM users.
Consistency is one of the harder things to achieve with newer volunteers,
specifically if we can't enforce any methods or rules by limiting how the
buildings should be digitized.

I was wondering about the ArcGIS built-up area tool (delineate built up
area tool). We do need the input building (in_building) data. We can remind
the volunteers to be consistent next time we have a mapathon or remind them
with these emails, but we do need that initial input data even though the
quality might be compromised. Anyone with a suggestion to a standard

I should be able to help with some of the work on the built up area


On Mon, Aug 31, 2015 at 7:53 PM, Daniel Specht <danspecht at gmail.com> wrote:

> A lot of work is going into creating built-up areas, but the results are
> inconsistent.  People do good work, but there is no standard method.
> Once buildings have been mapped (example: much of the Nepal project #1018)
> built-up areas don't need to be done by hand. I used an automated tool to
> generate built-up areas from as small area in Nepal, and the results are at
> https://drive.google.com/folderview?id=0B79TF0JkJwBffjIybGRVd2VNVllkdGd1bFBJdzJWUzdjM3N5Q1pDYm5NbGJuNVcxRXA1UjA&usp=sharing
> .
> The polygons generated by the tool are more consistent, and have a higher
> density of buildings than those drawn by hand.
> The tool, which is part of ESRI ArcGIS Advanced, (i.e. ArcInfo), allows
> the user to decide the minimum number of buildings per area, and the
> maximum distance between buildings.
> If there is a large area with buildings mapped, someone with that tool or
> a similar tool could generate built-up areas for that entire area. This
> would also be good for updating built-up areas after new housing was built.
> I'd be happy do do some of this work.
> --
> Dan
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