geocoding: autocomplete for osm search

[tyrasd]

Autocomplete should also work for arbitrary region search (like for the hot projects). There are a couple of osm-based search engines (photon, mapzen, mapbox) with autocomplete support, but none of these provides the full geometry of the search results (e.g. an OSM-object-id to fetch the full geometry from). This currently leaves only nominatim, which on the other hand sadly doesn't support autocomplete.

Hints/Ideas for how to tackle this are welcome! 🙇

[tyrasd]

Maybe it would help if we limit this to administrative boundaries, but that's still much too much data to be simply preloaded like the hot projects list…

[tyrasd]

osmnames could be an option, although I think they don't directly provide the geometries like nominatim does.

[kamicut]

@tyrasd Have you considered running the Pelias API created by Mapzen or even hosted Pelias geocode.earth?

[tyrasd]

thanks for the hint, but as far as I can see, it also doesn't return the full geometry of the search results, does it?

[kamicut]

Ah, sorry, I misunderstood the problem. Pelias returns the Mapzen whosonfirst id which you could use to return a full geometry, but I don’t know if it’s necessarily OSM. It seems the hosted whosonfirst is shut down though now that I’m looking for it.

[tyrasd]

after digging around a bit, I found https://whosonfirst.org/browse/ which seems to be still operational and offer the kind of stuff we would need, for example https://data.whosonfirst.org/101/751/119/101751119.geojson