This was generated using Spatial Analyst and a simple point to grid function using a one square mile cell. In other words it is a very basic count by grid cell, no interpolation, exact visualisation of Tennessee's cave density. I plan on extending this to Alabama and Georgia once I manage to get cave locations for these states. I was surprised how easily this was done using ARC and how complicated it would be using Manifold. I expected the opposite.
It's interesting to compare my density surface to Dave Weary's found as figure 8 in this report: pubs.usgs.gov/sir/2005/5160/PDF/sir2005-5160part3A.pdf
He is only using 1,395 cave locations for the entire Appalachians whereas I had over 9,000 for TN alone. He is deriving a continuous surface interpolating between points. Is this what's known as kernel density? I think what I am showing is a better representation of reality.
This is very early data exploration for a more thorough examination of the TAG region's karst features.
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