Are there any tools or plugins that convert general GIS polygons into OSM multipolygons with relations? I’ve searched online but haven’t found a match. Specifically, I’m looking for a way to handle 3 different levels of administrative boundaries where adjacent areas share a single line connected via a relation.
Some months ago, I updated the Singapore and Bogor Raya administrative boundaries using a tool I developed myself (semi-automated), but I’m looking for existing alternatives that might be faster or more optimized.
