Global Watersheds

🌍 Click somewhere on the map to get started.

πŸ“Œ Location:

πŸ“ˆ Precision:


✏️ For watersheds, display:

πŸ“š Data Source:

πŸ–ΌοΈ Customize features

Rivers color:       

Watershed color:


Line thickness:

⌨️ Show keyboard shortcuts

πŸ”§ Hide Map Controls

πŸ—ΊοΈ Show an inset locator map

πŸ“ Map Location: πŸ–±οΈ Pointer (lat, lon): ,
πŸ” Zoom level:

πŸ’» Downloads

⚠️ Error Message

βœ”οΈ OK Message

Legend for watershed outlet point:
o Requested
o Snapped to river

Paste this as html into your website or blog to display an interactive map of your watershed. You can adjust the size of the map by changing the width and height parameters.

 Copied to clipboard

Please wait a moment while we create a custom page for your watershed.

D or F: Switch to Downstream - Trace Flow Path. Equivalent to changing your selection on on the drop-down menu at the top left of the page.

U or W: Switch to Upstream - Delineate Watershed. Equivalent to changing your selection on on the drop-down menu at the top left of the page.

Enter: Start the watershed delineation or flowpath tracing task. Equivalent to clicking the β€œDelineate” or β€œTrace” button on the map popup.

Escape: Cancel a delineation or flowpath tracing job that is running. Equivalent to clicking the β€œCancel” button on the map popup.

Delete: Delete the watershed or flowpath on the map. Equivalent to clicking the red β€œDelete” button at left.

Your download request was sent. Please wait.

Hi! If you're enjoying the free Global Watersheds app, please lend your support. It's fast and only a few bucks:

β˜•οΈ Buy me a coffee

How your support helps: I recently had to upgrade my hosting plan to keep the site from periodically going offline. At its peak, the app creates a new watershed every 1.2 seconds! Web hosting costs a few hundred dollars per year, a lot for a hobby project by a full-time student. Please support the app to keep it free for everyone.

Thank you! πŸ™ πŸ’•