Mapping OSM landcover multipolygons with JOSM

This is a brief overview of how I edit Open Street Map (OSM) to add adjoining land-cover areas as multipolygons with shared boundary ways to reduce duplication and overlapping ways.

The tools used are:

Documentation on MultiPolygons in the OSM wiki:

[eltompar]

Hello from the OSM Slack channel! Thanks for this. I didn't even know you could do shared boundaries with multipolygons even after reading the OSM wiki page multiple times. This functionality makes a lot of sense.

[Zverikkk]

Good video! I'd like to add that in the first part, when you're creating multipolygons, you could use Relation Toolbox's "Multi" button having selected just a freshly drawn segment: it automatically splits adjacent multipolygon(s) to create a new multipolygon from parts.

[DavidSwarthout]

Good job and interesting to watch. I seldom use the Relation Toolbox but I'll give it a go soon enough.

[AnilBasnet]

Is it bad to use two, three or more separate polygons with joined nodes rather than using multipolygon ? Multipolygon might be complex for everyone to understand.

[landeros]

There is a way to create a lot of similar polygons (Buildings), automatically? i mean, in an expecific area create a lot of them in short time