TN sinkholes area heatmap quad/3x3 (original) (raw)

Sinkhole area metric based on 3m digital data. The heatmap is based on subdividing each topo quad into a 3x3 grid. The area metric is the sum of sinkhole areas within the cell. TN 7.5' topo is about 60 sq miles, so each cell (2.5') is about 6.7 sq miles.

See TN sinkholes