"Maps in Four Dimensions

on YouTube ↗11m

" summary

Shows elevation and time as bona fide mapping dimensions, not metaphor. Recreates Minard’s Napoleon retreat with Google Maps and flags ~95,000 deaths out of 100,000 to show rate and distance from home. Builds Walk Score transit time maps with Front Seat software and plots every bus arrival/departure in Portland for one day to reveal a 5:00am commuter convergence and 3:00am collapse. Computes a four-dimensional shortest-path tree (time surface + position) and visualizes it by rotating the tree so constant-time contours become horizontal planes.

AI-written summary · about

" chapters (5)

1. 0:00Introduction
2. 1:59Menards Map
3. 2:48Battle of Gettysburg
4. 4:10Job Loss
5. 6:21Transit Maps

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