awww yeah. 😎💪💫 After a few years, I've given in and added support for waterway relations in #WaterwayMapOrg code.
Notice how the Rhein, Elbe & Danube are all connected up as a single feature with the same name? It's using the `name` tag from the relation to match them up.
this is preview, WWM code will update haha soon enough. This'll mostly be useful for the River database list.
#maps #geodata #OSMDataProcessing
Turns out the “weirdly long lengths” on #WaterwayMapOrg was … because the hand written distance function I wrote had some sort of bug.
I switched to a Proper Library™, and everything is Looking Sensible™
Hmmm, Wikipedia tells me the #Yukon River is 3,190 km long¹, but on #WaterwayMapOrg, (taken from #OpenStreetMap), I have it at 4,924 km long²…
I'm gonna have to figure out what's going on here. WWM's length is of the whole connected name group. Multiple connected side streams would increase the total length. But +1700 km?!
(yes the length is haversine distance, no web mercator/geometry stuff).
¹ https://en.wikipedia.org/wiki/Yukon_River
² https://waterwaymap.org/river/yukon-river-327.000253200090/
#geo
Sure I didn't do things I needed to this week, but look at this nifty #WaterwayMapOrg map showing watersheds!
(data © OpenStreetMap contributors, https://waterwaymap.org/#map=9.93/43.7212/-79.4735 )
Video von mein #FOSSGIS2025 Vortrag über about #WaterwayMapOrg ist jetzt verfügbar online!
(Mein erster deutschesprachiger Vortrag!)
https://media.ccc.de/v/fossgis2025-58272-nicht-von-neuen-algorithmen-uberflutet-osm-daten-fur-waterwaymap-verarbeiten
#opensteetmap #OSM
The video of my #FOSSGIS2025 talk about #WaterwayMapOrg is online. Here's the video! ☺️
(Currently only available in German.)
https://media.ccc.de/v/fossgis2025-58272-nicht-von-neuen-algorithmen-uberflutet-osm-daten-fur-waterwaymap-verarbeiten
#opensteetmap #OSM
Current global loop count is 10023 (-0.2%).
✅ 3 new areas now have no loops!
❌ 1 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was DE at -5.0%
📈 The area with the greatest percentage increase was MX at +100.0%
Data: 26/02/2025 -> 03/03/2025
#OpenStreetMap #RiverMapping #WaterwayMapOrg
Current global loop count is 10050 (+0.6%).
✅ 1 new areas now have no loops!
❌ 8 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was MK at -75.0%
📈 The area with the greatest percentage increase was IN-GA at +100.0%
Data: 19/02/2025 -> 25/02/2025
#OpenStreetMap #RiverMapping #WaterwayMapOrg
Current global loop count is 10016 (-0.0%).
✅ 1 new areas now have no loops!
❌ 2 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was TR at -37.3%
📈 The area with the greatest percentage increase was US-TX at +100.0%
Data: 12/02/2025 -> 18/02/2025
#OpenStreetMap #RiverMapping #WaterwayMapOrg
Just spent the weekend at Karlsruhe Hack Weekend at @geofabrik working on a cool new feature for #WaterwayMapOrg
I had to set up CGI on Hetzner’s web hosting, and it felt like I time-traveled back to the early 2000s—pure old-school web vibes. 🕹️✨
Now, fingers crossed that I can efficiently serve my millions of tiny files
Current global loop count is 10007 (-0.1%).
✅ 4 new areas now have no loops!
❌ 1 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was US at -62.5%
📈 The area with the greatest percentage increase was SE at +100.0%
Data: 29/01/2025 -> 04/02/2025
#OpenStreetMap #RiverMapping #WaterwayMapOrg
Current global loop count is 10018 (-0.2%).
✅ 9 new areas now have no loops!
❌ 5 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was ES at -71.4%
📈 The area with the greatest percentage increase was SL at +100.0%
Data: 22/01/2025 -> 28/01/2025
#OpenStreetMap #RiverMapping #WaterwayMapOrg
I am using an #LLM (#ChatGPT) to learn how various hydrological features are called. 😂😭
“When river A flows into B, what do we call B from A's perspective?” etc 😂😂😂
#WaterwayMapOrg
One of our 2025 New Year's resolutions was to restart our very long running #OpenStreetMap blog interview series, and I am pleased to share our first interview of the year - we chatted with @amapanda maker of WaterwayMap
https://blog.opencagedata.com/post/openstreetmap-interview-waterwaymap
Current global loop count is 10038 (+0.2%).
✅ 1 new areas now have no loops!
❌ 6 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was IN-CT at -33.3%
📈 The area with the greatest percentage increase was IN-WB at +50.0%
Data: 15/01/2025 -> 21/01/2025
#OpenStreetMap #RiverMapping #WaterwayMapOrg
Current global loop count is 10016 (+1.4%).
✅ 3 new areas now have no loops!
❌ 1 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was SA at -55.0%
📈 The area with the greatest percentage increase was IN-CT at +50.0%
Data: 08/01/2025 -> 14/01/2025
#OpenStreetMap #RiverMapping #WaterwayMapOrg
Current global loop count is 9775 (-0.2%).
✅ 5 new areas now have no loops!
❌ 0 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was MN at -92.0%
📈 The area with the greatest percentage increase was VE at +100.0%
Data: 01/01/2025 -> 07/01/2025
#OpenStreetMap #RiverMapping #WaterwayMapOrg
Current global loop count is 9829 (-3.4%).
✅ 6 new areas now have no loops!
❌ 2 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was VE at -87.5%
📈 The area with the greatest percentage increase was IN-UT at +50.0%
Data: 25/12/2024 -> 31/12/2024
#OpenStreetMap #RiverMapping #WaterwayMapOrg
Current global loop count is 10222 (-3.7%).
✅ 13 new areas now have no loops!
❌ 5 new areas now have loops to be reviewed.
📉 The area with the greatest percentage decrease was CL at -97.7%
📈 The area with the greatest percentage increase was PH at +66.7%
Data: 18/12/2024 -> 24/12/2024
#OpenStreetMap #RiverMapping #WaterwayMapOrg
Wanna help make #maps of #waterways from #OpenStreetMap? #WaterwayMapOrg now includes a first attempt at data export for you.
read more: https://github.com/amandasaurus/waterwaymap.org/issues/74#issuecomment-2557099038
I'd like people to try it out and give me feedback on that data, how it's structured, etc. Is this the best format/layout?
Share the maps you make please. 🙂
