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 area I’m editing, is replete with examples of this type of mapping:

The tools used are:

Documentation on MultiPolygons in the OSM wiki:

I also have a video about debugging gaps in multipolygons:

Location: Buttolph Acres, Middlebury, Addison County, Vermont, 05753, United States

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