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:

Not a sinkhole, highway acts as dam, weighted centroid 36.16978107660,-84.07065174350, not in faux sinkhole

html centroid 36.171895,-84.071320

leafletjs.com
TODO testing leafletjs


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Tom Dunigan TNlandforms.US