See the website.

News & Updates on the OSM Town Mapstodon.

• Fedi/Mastodon post
• OSM Community Forum
• Hacker News: #1 (2023-08-30) (as “OSM River Basins”), #2 (2024-01-24), #3 (2024-08-19)
• I gave a lightening talk at State of the Map Europe 2023 in Antwerp, Belgium in Nov. 2023. slides.
• “Flowing Connections: Mapping rivers & streams with WaterwayMap.org” Presentation at State of the Map Europe 2024 in Łódź, Poland on Sun. 21st July 2024. slides. programme entry. As of Jan. 2025, there are no recordings available.
• Interview about WaterwayMap.org on The OpenCage Blog (Jan. 2025)

• neis-one #WaterwayMapOrg (older #RiverMapping tag).
• OSMCha #WaterwayMapOrg (older #RiverMapping on OSMCha)

• Should river lines be mapped through lakes, estuaries, gulfs, and other large water bodies? (Oct. 2023)
  • Flowlines tagging proposal. osm comm. forum & tagging@.
• Properly mapping dry washes (Jan. 2024)
• Is there a common tag for underground infiltrated watercourses? (Apr. 2024)
• How to map a Lazy river in an amusement park (May 2024)
• RfC: Deprecate use of “waterway=pressurised” on anything not artificially built for hydropower uses (June 2024)
• All posts tagged #waterwaymaporg, or #waterway on the OSM Community Forum.

Loops in waterways are detected and shown on: WaterwayMap.org/loops.

• Fedi/Masto post
• OSM Ccommunity Forum announcement

Points at which waterways end are shown on: WaterwayMap.org/ends.

• Fedi/Masto post
• OSM Ccommunity Forum announcement

To detect places where waterways (e.g. rivers) flow into a stream, a GeoJSON file of those is generated: data.waterwaymap.org/planet-waterway-stream-ends.geojson.gz (~ 2 MiB compressed). It can be loaded into JOSM to find errors.

It was asked for in issue 52, with the code in commit 4730275.

A CSV file of statistics of loops is generated and available for download at data.waterwaymap.org/waterwaymap.org_loops_stats.csv. See the osm-lump-ways documentation on the CSV stats file for documentation.

It is used by @watmildon@en.osm.town for a mastodon account summarizing stats: @OSMWaterwayLoopStats@en.osm.town feed

A CSV statistics file of end points, is also generated dails and downloadable at data.waterwaymap.org/waterwaymap.org_ends_stats.csv.zst.

See the osm-lump-ways documentation for file format.

• JOSM Waterway Style

If you like WaterwayMap.org, you might like the following other websites:

• Global Watersheds (mheberger/delineator on github)
• RiverMap.online

Copyright MIT or Apache-2.0, 2017→2024 Amanda McCann amanda@technomancy.org

Initially this project was called osm-river-basins.