walkerke

# 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

ruoyu0088