4 ms·
In the USA, this is likely sourced from the National Hydrography Dataset: https://www.usgs.gov/national-hydrography/national-hydrography-dataset https://www.us
by Mr-Frog 3y ago
In the USA, this is likely sourced from the National Hydrography Dataset:
https://www.usgs.gov/national-hydrography/national-hydrography-dataset https://www.usgs.gov/national-hydrography/national-hydrograp...
- rmc 3y agoNope, it's 100% OpenStreetMap data. (I made WaterwayMap.org)
- matkoniecz 3y agoOSM has some NHD imports.