TN leaflet map
Enter street,city,state or zip code or lat,-lon (dd.ddd)
     (for other lat/lon encodings or UTM or NAD27 use this)
Distance buttons: left click on map to make a track
this button will popup a window from which you can save the track as a file.gpx for uploading to your GPS.
   Plot track elevation profile -- google elevations (10m DEM) and area (acres)
   Plot track elevation profile -- courtesy of heywhatsthat.com (30m SRTM)
Add TN county lines to map:

Old Zion
from sinkhole digital analysis
weighted centroid: 35.96430310800,-85.54069747080
Area: 3.5 km2
Perimeter: 30.3 km
Depth: 11.1 m
Volume: 1102920 m3

leafletjs.com
TODO testing leafletjs


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Tom Dunigan TNlandforms.US