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It seems you're misunderstanding the map. It's how much space each of those categories is taking up as a fraction of the total area of the contiguous US, not where that land use primarily occurs.
A place to share and discuss data visualizations. #dataviz
It seems you're misunderstanding the map. It's how much space each of those categories is taking up as a fraction of the total area of the contiguous US, not where that land use primarily occurs.