TN Leaflet map

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:

You can drag map with left button
left click on icon to get name and clickable link
right click to add a waypoint
other leaflet TN landform maps: arches falls sinkholes towers GSMNP AT shelters Oak Ridge greenways

Northcutts Cove sinkhole

Spatial Analyst seems to underestimate the size (blue line) of the Northcutts Cove sinkhole. The shapefile has innerBoundary paths (bumps in the sinkhole), and one of the topos has 10' contours, maybe that has confused the tool. The sinkhole contour lines on the topo map suggest a bigger sinkhole. The 10m DEM data would suggest that the lip is at the northern end of the sinkhole (35.5058510,-85.7533530) with an elevation of 1153', whereas Spatial Analyst reports lip at 1105' and depth of 5m and area of 0.41 km². Here are the 10m DEM cells near the lip.

           1156.91 1152.71 1150.03 1147.42 1142.09
           1156.77 1154.45 1152.65 1151.29 1149.18
           1154.42 1152.76 1153.56 1154.64 1153.84
           1150.26 1150.29 1151.90 1154.48 1156.40
           1146.90 1146.62 1150.06 1156.30 1161.18

Using the 1153 contour as the enclosing path (yellow) yields a depth of 64' and an area of rougly 1.2 km². Low point is 1089.1' at 35.500715,-85.755211.

See Tennessee sinkholes

leafletjs.com
TODO testing leafletjs

caltopo shaded layer

numbered pins

geolocate

PoI and move map, fickle mouseover? ok with marker vs circlemarker, but xhair drift, center drift on zoom ??

Tennessee landforms GSMNP landforms BSF landforms AT shelters
Tom Dunigan TNlandforms.US