[HOT] Mapping buildings something to think about

Jo winfixit at gmail.com
Mon Apr 10 22:31:48 UTC 2017

Hi John,

I feel your pain. While demoing JOSM to a potential GSoC candidate I
downloaded a building block in Mozambique. Almost all the buildings were
tagged area=yes! This is a problem with the iD editor that we reported 18
months ago and it's up to JOSM validators to resolve them. Life is just too
short. It's beyond belief that the iD developers cannot get their shit
straight, even afer all this time.

Anyway, for our National Mapathon I had created the following (since we had
Windows computers with Java installed available):


You can download it as a zip from github.

Then run the josm_tested.cmd
This will call the powershell script, which downloads JOSM and starts it
with settings for remote control enabled. Somehow it's still necessary to
download the plugins, but the useful ones are already selected.

I hope this helps to organise more mapathons were users are taught to map
with JOSM right from the start. It takes a bit longer to get them going,
but the users are so much more productive and validators will come in
hordes to thank you :-)


2017-04-10 23:50 GMT+02:00 john whelan <jwhelan0112 at gmail.com>:

> I've been looking at one section of Africa and tagging untagged ways and
> area=yes ways.  It's a very small % of the entire continent.
> So far in the last couple of days I've tagged nearly 800 buildings and I
> have another 350 untagged ways to go through.
> Looking at the mappers and the profiles many of these seem to be from a
> number of recent building only projects.  Now these should be some of the
> simplest things to map.
> Missing 1,000 buildings in this area alone by not tagging them to me is
> significant.  It might not be to others.
> My estimate is of the buildings that are mapped 30% are not square or the
> building image and the mapping are different in size.  This is a
> conservative estimate.
> To save my fingers and wading through the to_do list could a bit more
> effort be made on the JOSM building_tool plugin front.  Jo / Polygot has a
> recipe for running it from a USB stick.  It is simple to use and very
> difficult to misstag.
> You get more buildings out of the mappers and best of all you don't get 45
> tiles on one project marked done as I've seen by a mapper who had mapped
> 186 buildings but managed not to tag them.
> This means the project data isn't reliable and in my experience end users
> like reliability. I'm not sure why, my programmers always thought that the
> speed the programs ran at was more important.
> Cheerio John
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