Calculation of Lat long coordinates which correspond to the New London
survey, etc., is based on:
1) 1980 boundary survey description (footage and degree bearings). See 20160505161313051.pdf
2) GPS measurement of the NE corner on 04-OCT-08
1:37:42PM 18 T 741209
4812568 1267 ft (From
2) A "UTMsrc.txt" was created
that contains text lines of the following information :
! (All lines which begin with an exclamation
magnetic declination New London
east ([Northwest] start
north ([Northwest] start
hexadecimal value not explained here.)
survey information (27
lines) 01 S 70 48
3) A "UTM.c" program was created which reads the "UTMsrc.txt" data, processes successive UTM
prints or saves a file of the results. A typical "UTMoutG4.txt" file is output.
4) The UTM coordinates from "UTMoutG4.txt"
were translated to lat long coordinates by
The lat long boundary coordinates are listed in
5) The lat long coordinates were input to http://www.gpsvisualizer.com/
in order to display the points on Google Earth.
One Google Earth result is here: 20160506214657-43175-map.html
I do not currently recall why I chose to use UTM
coordinates back in 2008.
(Simpler code? Do UTM
computations yield more accurate results?)
If time permits, I should see if I could include
conversion from UTM to lat/long in my UTM.c program.
I have read that Google Earth can be off by more
than 10 meters.
Magnetic declinations change over time. If the
declination is tweaked for the actual New London conditions
during the survey in 1980,
possibly there could be some improvements.
Also, to compensate for my hand held Garmin GPS
error, the start point can be tweaked.
The Google Earth results here show a number of things.
1. The Northwest corner is
High Pine Lane.
2. The property frontage is
with Newport Road.
3. The Northeast corner is very
close to 575 NEWPORT ROAD driveway.
4. Two of the four metal pipe
locations on the sothern border do coincide with the property on
Gay Farm Road that was clear
cut. (Clear cut
around 2005 ?)