(I made WaterwayMap.org) The data is 100% OpenStreetMap, and updated daily. Something missing on WWM.org means something missing on OSM. You can fix that yourself!
> What's interesting and somewhat amusing is that this map has determined that the section of the Soar that joins with the Trent just north of Loughborough is apparently unnavigable
The boat views only use the OpenStreetMap `boat` tag. If a section of river is missing from WWM.org, then it's likely the tag is missing from the OSM waterway. You can fix that!
Hmm I investigated that and the missing sections on OSM are indeed tagged with boat: yes and motorboat: yes. I'll do a little more digging
PS. Despite using OSM for many years, I've never looked into editing it. Thanks for giving me the impetus to start! There are bits and bobs I've noticed aren't entirely correct as we move around the country, and now I'll be able to fix them where necessary.
(I made WaterwayMap.org) Yeah, it's been very useful to make OSM data better.
> some streams are disconnected by other waterbodies where they should not be, as there seems to be little consensus on how to connect waterways through lakes and other waterbodies
(I made WaterwayMap.org) The data is 100% from OpenStreetMap. I only have to deal with 1 dataset. I suspect people have imported data from Massachusetts into OSM, hence why you see the edge. You can edit OSM to connect things up yourself.
(I made WaterwayMap.org) The data is 100% OpenStreetMap. It's possible many rivers are missing the `boat` tag (which that uses). If you add the missing tag, then it'll appear on WWM.org tomorrow!
> For bigger rivers that I'm familiar with I was not able to make sense of that number. […] Maybe it's the total length of that waterway and all connected waterways?
> “The "Navigable by canoe" filter seems to filter out everything”
The data is 100% from OpenStreetMap. That map only looks at things with the `canoe` tag in OSM. There are a lot of waterways in OSM which do not have this tag. If you know of missing data, you can just edit OSM and it'll show up on WWM.org tomorrow!
