Soil Site 1 , Average Latitude / Longitude Calculations

Bottomland along White River (Township18 N, Range 12 W, Fractional Sec 19, LBWR)

Discussion: To find the answer you must average the varied readings and convert the feet to meters of elevation. To average the minutes of latitude and longitude, find the sum of the minutes (or fractional parts thereof) and divide by the number of readings. In a similar manner, average the feet of elevation and multiply by 12 ( to turn it into inches) then divide by 39.34 (inches to meters conversion factor).

The table below is arranged as a spreadsheet to show the calculations.

Time (UT)	Latitude ° North	Minutes		Longitude ° West	Minutes	Elev (Feet)	Elev Meters (Feet*12)/39.34
0:01	36°	13.19		92°	19.045	440.00
0:02	36°	13.19		92°	19.038	427.00
0:03	36°	13.197		92°	19.032	393.00
0:04	36°	13.208		92°	19.031	375.00
0:05	36°	13.218		92°	19.033	410.00
	36°	13.2006		92°	19.0358	409.00	124.76
round-off		13.20			19.04		125

Norfork Quadrangle Mapsheet approx. elevation

contour between 380 - 400 feet above MSL

In lieu of calculating the elevation, GLOBE now authorizes the use of the approximate value read from the contour lines found on a topographic mapsheet of your location or those found at www.terraserver.com . or www.TopoZone.com , an example for this site is found here.

For this site, the map location is near the center of the page, in the open field between the railroad track and the river, about a centimeter below the dashed red section line. The contour interval is 20 feet. Can you estimate the elevation? How does the estimated elevation compare with the GPS'd elevation?