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| # Day 26: Transport - US Electric Power Transmission Lines | |
| # Visualizing America's invisible highway: 700,000+ miles of power lines | |
| # Dynamic line widths by voltage class, glowing effect for the energy flow | |
| library(mapgl) | |
| library(sf) | |
| library(dplyr) | |
| # Load transmission lines from HIFLD (Homeland Infrastructure Foundation-Level Data) | |
| # This is a large dataset - we'll use direct URL for the GeoJSON |