[HOT] Digitizing complicated buildings in JOSM - Short Tutorial from Mapbox

Alessandro Fanna rospus at gmail.com
Wed Jan 20 08:04:58 UTC 2016

Hi Blake, hi all (my first post here).

I have 2 options for your doubt:

1. By selecting 2 nodes every box you're going to draw will be parallel.
Same effect as selecting another box. The difference is that the 2 nodes
could be of any geometry, i.e. a road's pipe with a particular angle that
you want to follow (good for drawing buildings parallel to a street).

2. Maybe he was referring to another way of drawing complex buildings: by
adding 2 nodes on a box side, you can extrude the portion with the 'Create
area shortcut' tool. This way you don't have to select and merge
overlapping boxes at the end.

Hope I got it right.
Cheers from Italy ;-)


2016-01-20 0:46 GMT+01:00 Blake Girardot <bgirardot at gmail.com>:

> Hi all,
> For the JOSM users:
> https://www.mapbox.com/blog/fast-building-tracing/
> I tend to use the X tool, but both ways illustrated are great.
> The only part of the text that does not make sense to me is where it says
> in the "area intersections" method: "then select 2 nodes of that box"
> My understanding and usage of the building tool is that if you select a
> building as a way, you know, just click on the building to select it, then
> switch to the building tool 'B', every building you draw will be parallel
> to that selected building. That is what it looks like he does in the
> animated gif demonstration.
> If someone knows what the 'select 2 nodes' applies to and how it is
> different than just selecting the whole building, I'd love to hear it.
> Thank you for the tutorial Andrey.
> Happy building mapping!
> Cheers,
> Blake
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