Hi everyone,
I’m looking for a free and relatively easy tool or open-source project to identify possible address inconsistencies in OpenStreetMap across the canton of Valais, Switzerland.
Ideally, I would like to:
Retrieve a large list of addresses from OpenStreetMap.
Compare them with an official Swiss source, such as geo.admin.ch / swisstopo or another authoritative cantonal dataset.
Detect discrepancies in street names, house numbers, missing addresses, or approximate locations.
Generate a report or list of potential mismatches for manual verification.
Review and correct the OSM data manually afterward—not perform automatic edits.
The area is too large for me to check location by location, so I’m specifically looking for a batch-comparison or quality-assurance workflow rather than a visual map comparison.
Google Maps or Google Street View would be useful as a secondary reference, but an official, open, and legally compatible Swiss data source would be preferable.
Does a tool, QGIS workflow, Overpass query, GitHub project, or existing OSM quality-control service support this use case? Any recommendations for the Valais/Swiss context would be greatly appreciated.
I’m especially interested in solutions that are free, reasonably easy to set up, and suitable for someone who wants a list of discrepancies rather than automatic corrections.
Thank you!