It's something I've noticed in Africa so its probably not putting new
mappers through a month's training first but many villages have been mapped
but tagged as a single building with building=yes.
They aren't grouped together but rural Africa doesn't have that many large
foot print buildings so it
Hi John,
The OSM Changeset Analyzer let's select bbox and option parameters including
big building. To test if it provides too many positive answers. There could be
an other option for very big buildings??
example with reason 34 Large buildings
http://osmcha.mapbox.com/?bbox=9.272%2C-13.496%2C43
Probably what I'm after is something that I can load up a chunk of map at a
time say a quarter of an African country from the daily dump in JOSM then a
selection based on building=yes with a certain minimum size would areasize
work for that? Then I can use the todo list to check them one at a time
Hi John,
When I first saw your message, I looked into Overpass API, but no luck. In
JOSM areasize would definitely work. You'll have to find a sweetspot around
100-
so
building areasize:100-
or possibly 500 or 1000.
Polyglot
2017-03-25 19:34 GMT+01:00 john whelan :
> Probably what I'm after
I'll need to play around but by using building followed by remove addr,
name etc I can start to pick them out. What exactly is areasize measured
in?How can I determine an areasize?
Thanks John
On 25 March 2017 at 20:05, Jo wrote:
> Hi John,
>
> When I first saw your message, I looked into Over
JOSM comes with a measurement plugin :-)
I drew a square somewhere in Africa with sides of about 100m and the area
is about 1m2.
For giggles, I then grabbed it and dropped it in Europe. Now the
circumference is 255m, so one side 65m and the area became 4047 square
meters.
Cheers, and hurray
areasize:300- works quite well. I picked up nine of them. You get a fair
amount of large buildings mixed in but its doable with the todo list
plugin. The maesurement tool helps as well.
Thanks John
On 26 March 2017 at 02:04, Jo wrote:
> JOSM comes with a measurement plugin :-)
>
> I drew a s
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