dabreegster
commented
1 month ago https://github.com/a-b-street/svelte-utils/blob/main/src/lib/OverpassSelector.svelte, depending on https://github.com/dabreegster/maplibre-draw-polygon, on the frontend is a start to this
In some other projects, I have a widget to import the map's current view (if zoomed in enough) or draw a freehand polygon boundary, and grab the raw OSM XML from Overpass, passing to a callback. Alongside predefined study areas, this is likely a useful thing to share. I'll probably make a standalone NPM package for it at some point, and just include a demo here.