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On the left, I’ve plotted A, K, & M tunnels beneath a grid of the local topography produced by digitizing part of a USGS 7.5 minute topographic quadrangle. The most apparent observation is that Florida is pretty flat. |
| However, by zooming in on interesting features like Cherokee sink shown at the left of this figure and overlaying a grid, we can begin to measure the proximity of topographic features to the underlying conduits. |  |