4 ms·

OSM River Basins

88 points by gregsadetsky 3y ago

gregsadetsky 3y ago
More info: https://github.com/amandasaurus/osm-river-basins https://github.com/amandasaurus/osm-river-basins
- matkoniecz 3y ago
  and https://community.openstreetmap.org/t/osm-river-basins-website-to-show-how-are-rivers-in-osm-connected/102655 https://community.openstreetmap.org/t/osm-river-basins-websi...
pmontra 3y ago
It's missing man made channels. Some natural waterways end in a channel which ends in another natural waterway. All of three should be connected but the channel in between breaks the connection and the channel is not marked on the map. Probably the first waterway ended up into another natural one before men made the channel, because water flows no matter what.
- Aachen 3y ago
  Do you have an example? It sounds like either you're saying the website is missing a tag like waterway=ditch or you haven't seen the "include canals" button or so, but with an example it's probably easiest to tell which. The underlying database probably has the data you're missing
  - pmontra 3y ago
    I didn't see the second radio button. The first one is "only waterway=river" The second one is "with waterway & name" It does not refer to canals but the effect is to also include them. Maybe all of them is too much but finding the only canal the merges two waterways could be difficult. No idea.
    - samtho 3y ago
      I was able to select waterway and canals and, in California, I was able to see prominent ones like the California aqueduct that runs from Tracy to LA and smaller ones like the south Folsom canal that runs from Lake Natoma to the former nuclear power plant Rancho Seco.
  - mannykannot 3y ago
    "Include canals" does not seem to distinguish between canals that have replaced natural drainage channels, and those that connect different watersheds - which may or may not be what you want. This is noticeable, for example, in the English midlands, where the major watersheds merge into one connected entity (maybe because of the network of pre-railroad navigation canals?)
deleted 3y ago
[deleted]
sampo 3y ago
A map (and the data) of river drainage basins (American: watersheds) would also be interesting.
- mkl 3y ago
  There are plenty of those: https://duckduckgo.com/?q=world+watershed+map&atb=v279-1__&iar=images&iax=images&ia=images https://duckduckgo.com/?q=world+watershed+map&atb=v279-1__&i...
  - sampo 3y ago
    Maybe this site has the data as open source: https://www.hydrosheds.org/products https://www.hydrosheds.org/products
- tasseff 3y ago
  You may find this useful: https://www.usgs.gov/national-hydrography/watershed-boundary-dataset https://www.usgs.gov/national-hydrography/watershed-boundary...
pbmonster 3y ago
Is there a connection between Rhine and Rhone somewhere? I always get the same color for them. Weird.
- lgeorget 3y ago
  Do you have the canal option checked? https://en.m.wikipedia.org/wiki/Rh%C3%B4ne%E2%80%93Rhine_Canal https://en.m.wikipedia.org/wiki/Rh%C3%B4ne%E2%80%93Rhine_Can...
liotier 3y ago
A 30 seconds look at river basin connectivity around a place I know gives me plenty of JOSM fodder - highly efficient visualization !
digging 3y ago
Interesting to be able to see many waterways being extremely tightly wound and others straightforward over long distances. I wonder if it's an issue of data resolution or actual geography.
phh 3y ago
That's beautiful. I'm impressed we can compute related components on a world map so fast. The interconnections everywhere are beautiful. If this data is reliable, you can go from west europe to east china with just 3 changes (largely helped by canals) It makes me want to make a remotely (4G) controllable solar-powered tiny boat, and see how far I can drive it, though this map lacks the unreachable discontinuities (dam)
- playingalong 3y ago
  > compute so fast It could be and likely is pre-computed on server side.
  - rmc 3y ago
    I'm the creator of this. Yes, it's precomputed on a computer, but it only takes ~30 mins to calculate each view. Most of that time is file I/O (which I really need to refactor) follow me on fedi/masto for more news: <https://en.osm.town/@amapanda/ https://en.osm.town/@amapanda/>
ianburrell 3y ago
It does have some problems. The upper McKenzie River in Oregon is shown as separate drainage since there is a break in the river. There are multiple sections in that area that are separate. Bigger one is that the Columbia River is split at McNary Dam. I'm not sure what needs to be fixed in OSM. Maybe it needs to detect dams. Or rivers that don't end in the ocean or endoheric lake.
- flusensieb 3y ago
  Some rivers (especially in the US) miss their waterway-line through lakes/reservoirs and the part crossing the dam. These need to be added. Edit: https://wiki.openstreetmap.org/wiki/Rivers https://wiki.openstreetmap.org/wiki/Rivers Explains it quite well with some graphics.
  - rmc 3y ago
    (I'm the creator of this) Yes lots of rivers are missing those sort of connections through lakesᵉᵗᶜ, but that's not unique to USA. Please keep mapping to fix up things.
- troyvit 3y ago
  Cool it looks like the creator is looking for just this feedback here: https://community.openstreetmap.org/t/osm-river-basins-website-to-show-how-are-rivers-in-osm-connected/102655 https://community.openstreetmap.org/t/osm-river-basins-websi...
coldacid 3y ago
Nice but it definitely needs to support waterway=stream as well.
- rmc 3y ago
  (I'm the creator). There's a few views which will bring in _named_ streams, the `waterway` & `name` tag views. I tried to calculate it with any waterway tag, which would include unnamed streams, but my computer ran out of memory. Maybe later.
  - coldacid 3y ago
    I hope that you do get it going with unnamed streams too!
mannykannot 3y ago
In the American southwest, the map shows a dense network of waterways around Farmington NM, and extending roughly 100 miles E-W and 150 miles N-S, and a similar but smaller region between the Colorado river and the four corners. I would guess that this is an artifact of mapping, as the area is pretty arid, and perhaps a consequence of these being largely Navajo, Apache and Ute lands.
rmc 3y ago
Hi! I'm the creator of this tool! I'm open to more feedback, and suggestions. Even related views. Lots of people discovering OSM through this, which is great. This sort of tool is new, so we're all just fixing up lots of little tagging & topology mistakes which were hard to spot. follow me on fedi/masto for more news: <https://en.osm.town/@amapanda/ https://en.osm.town/@amapanda/>

OSM River Basins

88 points by gregsadetsky 3y ago

gregsadetsky 3y ago

More info: https://github.com/amandasaurus/osm-river-basins https://github.com/amandasaurus/osm-river-basins

matkoniecz 3y ago
and https://community.openstreetmap.org/t/osm-river-basins-website-to-show-how-are-rivers-in-osm-connected/102655 https://community.openstreetmap.org/t/osm-river-basins-websi...

pmontra 3y ago

It's missing man made channels. Some natural waterways end in a channel which ends in another natural waterway. All of three should be connected but the channel in between breaks the connection and the channel is not marked on the map. Probably the first waterway ended up into another natural one before men made the channel, because water flows no matter what.

Aachen 3y ago
Do you have an example? It sounds like either you're saying the website is missing a tag like waterway=ditch or you haven't seen the "include canals" button or so, but with an example it's probably easiest to tell which. The underlying database probably has the data you're missing
- pmontra 3y ago
  I didn't see the second radio button. The first one is "only waterway=river" The second one is "with waterway & name" It does not refer to canals but the effect is to also include them. Maybe all of them is too much but finding the only canal the merges two waterways could be difficult. No idea.
  - samtho 3y ago
    I was able to select waterway and canals and, in California, I was able to see prominent ones like the California aqueduct that runs from Tracy to LA and smaller ones like the south Folsom canal that runs from Lake Natoma to the former nuclear power plant Rancho Seco.
- mannykannot 3y ago
  "Include canals" does not seem to distinguish between canals that have replaced natural drainage channels, and those that connect different watersheds - which may or may not be what you want. This is noticeable, for example, in the English midlands, where the major watersheds merge into one connected entity (maybe because of the network of pre-railroad navigation canals?)

deleted 3y ago

[deleted]

sampo 3y ago

A map (and the data) of river drainage basins (American: watersheds) would also be interesting.

mkl 3y ago
There are plenty of those: https://duckduckgo.com/?q=world+watershed+map&atb=v279-1__&iar=images&iax=images&ia=images https://duckduckgo.com/?q=world+watershed+map&atb=v279-1__&i...
- sampo 3y ago
  Maybe this site has the data as open source: https://www.hydrosheds.org/products https://www.hydrosheds.org/products
tasseff 3y ago
You may find this useful: https://www.usgs.gov/national-hydrography/watershed-boundary-dataset https://www.usgs.gov/national-hydrography/watershed-boundary...

pbmonster 3y ago

Is there a connection between Rhine and Rhone somewhere? I always get the same color for them. Weird.

lgeorget 3y ago
Do you have the canal option checked? https://en.m.wikipedia.org/wiki/Rh%C3%B4ne%E2%80%93Rhine_Canal https://en.m.wikipedia.org/wiki/Rh%C3%B4ne%E2%80%93Rhine_Can...

liotier 3y ago

A 30 seconds look at river basin connectivity around a place I know gives me plenty of JOSM fodder - highly efficient visualization !

digging 3y ago

Interesting to be able to see many waterways being extremely tightly wound and others straightforward over long distances. I wonder if it's an issue of data resolution or actual geography.

phh 3y ago

That's beautiful. I'm impressed we can compute related components on a world map so fast. The interconnections everywhere are beautiful. If this data is reliable, you can go from west europe to east china with just 3 changes (largely helped by canals) It makes me want to make a remotely (4G) controllable solar-powered tiny boat, and see how far I can drive it, though this map lacks the unreachable discontinuities (dam)

playingalong 3y ago
> compute so fast It could be and likely is pre-computed on server side.
- rmc 3y ago
  I'm the creator of this. Yes, it's precomputed on a computer, but it only takes ~30 mins to calculate each view. Most of that time is file I/O (which I really need to refactor) follow me on fedi/masto for more news: <https://en.osm.town/@amapanda/ https://en.osm.town/@amapanda/>

ianburrell 3y ago

It does have some problems. The upper McKenzie River in Oregon is shown as separate drainage since there is a break in the river. There are multiple sections in that area that are separate. Bigger one is that the Columbia River is split at McNary Dam. I'm not sure what needs to be fixed in OSM. Maybe it needs to detect dams. Or rivers that don't end in the ocean or endoheric lake.

flusensieb 3y ago
Some rivers (especially in the US) miss their waterway-line through lakes/reservoirs and the part crossing the dam. These need to be added. Edit: https://wiki.openstreetmap.org/wiki/Rivers https://wiki.openstreetmap.org/wiki/Rivers Explains it quite well with some graphics.
- rmc 3y ago
  (I'm the creator of this) Yes lots of rivers are missing those sort of connections through lakesᵉᵗᶜ, but that's not unique to USA. Please keep mapping to fix up things.
troyvit 3y ago
Cool it looks like the creator is looking for just this feedback here: https://community.openstreetmap.org/t/osm-river-basins-website-to-show-how-are-rivers-in-osm-connected/102655 https://community.openstreetmap.org/t/osm-river-basins-websi...

coldacid 3y ago

Nice but it definitely needs to support waterway=stream as well.

rmc 3y ago
(I'm the creator). There's a few views which will bring in _named_ streams, the `waterway` & `name` tag views. I tried to calculate it with any waterway tag, which would include unnamed streams, but my computer ran out of memory. Maybe later.
- coldacid 3y ago
  I hope that you do get it going with unnamed streams too!

mannykannot 3y ago

In the American southwest, the map shows a dense network of waterways around Farmington NM, and extending roughly 100 miles E-W and 150 miles N-S, and a similar but smaller region between the Colorado river and the four corners. I would guess that this is an artifact of mapping, as the area is pretty arid, and perhaps a consequence of these being largely Navajo, Apache and Ute lands.

rmc 3y ago

Hi! I'm the creator of this tool! I'm open to more feedback, and suggestions. Even related views. Lots of people discovering OSM through this, which is great. This sort of tool is new, so we're all just fixing up lots of little tagging & topology mistakes which were hard to spot. follow me on fedi/masto for more news: <https://en.osm.town/@amapanda/ https://en.osm.town/@amapanda/>