Upstream/Downstream: Discovering and Displaying Watershed Topology!

on YouTube ↗10m

" summary

An interactive open source web app that shows everything upstream or downstream from any point claims to work on real US Geological Survey watershed boundary dataset data and to handle about 100,000 polygons. The pipeline shrinks a 2 gigabyte download to roughly 40 megabytes by converting to topo JSON and simplifying shared borders, uses leaflet jas with canvas rendering, and merges polygons so rendering time drops sharply so the map stays snappy including a mobile build.

AI-written summary · about

" chapters (6)

1. 0:00Start
2. 3:01Montana
3. 3:27Nevada
4. 6:26Challenges with the Data
5. 7:43Topo Json
6. 8:39Html5 Canvas

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