OpenStreetMap Forum

Cottaer

Member

Registered: 2008-03-12

Posts: 35

Josm: Split polygon function?

Hi, is there a easy/comfortable way in Josm to split a polygon into two independet polygons (preferably without sharing nodes along their shared border)? What I want to do: I stumbled across a few not-that-good digitized forests, which are in fact independant forests with farmlands inbetween, so I want to split them and move the sharing borders to the border of the forest (the rest of the border is not that bad, probably edited earlier).

I know, I can do it with splitting the way at two nodes, unsharing these nodes and combining the two ways to two polygons, but I think of some GIS-functionality that I can draw just a line over the polygon and it gets splitted along this; or I select two nodes and with a magic shortcut it splits the polygon into two at this two nodes (similar to Merkaartor).

Thanks for your help...

Lambertus

Inactive

From: Apeldoorn (NL)

Registered: 2007-03-17

Posts: 3,269

Website

Re: Josm: Split polygon function?

You can try the "terracer" plugin...it is specifically meant to split housing blocks into separate units, but might be able to split a polygon in two as well (I did not test this).

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Mapping tools: Garmin GPSmap 60CSx, Giant Terrago 2002

stephan75

Member

Registered: 2008-05-28

Posts: 2,918

Re: Josm: Split polygon function?

or the utilplugin2?

Tordanik

Moderator

From: Germany

Registered: 2008-06-17

Posts: 2,840

Website

Re: Josm: Split polygon function?

or the utilplugin2?

Yes, I would also recommend the utilsplugin2, see http://wiki.openstreetmap.org/wiki/JOSM … ilsplugin2

It has a "split area" tool. Split nodes will afaik be shared, but can of course be "unglued" afterwards.

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OSM in 3D: OSM2World

Cottaer

Member

Registered: 2008-03-12

Posts: 35

Re: Josm: Split polygon function?

Thanks a lot, I will try this next time. That day I did it the old way, but I stumbled upon this task quite several times. - And of course, there are many other useful situations, where it would be necessary, that the nodes would be shared, so that is ok.

Last edited by Cottaer (2012-10-05 17:52:37)

Palolo

Member

Registered: 2015-12-04

Posts: 8

Re: Josm: Split polygon function?

I know this is an old discussion, but my issue has to do with splitting polygons in JOSM.
In the past I have used the https://wiki.openstreetmap.org/wiki/JOS … ilsplugin2, however on a new computer none of the functionality is available after downloading and updating plugins.
Is this a bug with JOSM? the Plugin? the Windows OS?

escada

Moderator

Registered: 2011-08-13

Posts: 1,754

Re: Josm: Split polygon function?

@Palolo: it still works for me on the latest stable JOSM + OSX. Can't help you with windows.

p.s. I think It would have been better if you had started a new thread.