MnGCA

MN Lost Boy · Geocacher Joined: 27 May 2003 Posts: 30 Location: Scandia

I am trying to find my property line with a GPS.
I have a few corners a mile away in both directions.
Can I waymark them and then go to my approximate fence line and walk until I get a bearing say "DUE SOUTH".
I assume it would be about 10 - 20 feet accurate????

Lost Boy
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MN Lost Boy

When I found the skull in the woods, the first thing I did was call the police. But then I got curious about it. I picked it up, and started wondering who this person was, and why he had deer horns.

LanceVE · Posted: Wed Jun 04, 2003 11:34 am Post subject:

If your property lines are N/S, E/W you might be better off doing it based on the Lat/Lon numbers instead...

10 feet over a 1 mile distance is an error of 0.1 degrees in the bearing....

A 1 degree error in bearing at 1 mile away would put you about 95 feet off...

You might be able to use the "Project Waypoint" feature found in most GPS's to drop a few waypoints along the line for closer reference, using a waypoint at one of the corners and the bearing between them (assuming that that is a 'nice' number that you can enter all the decimal places of)

kleiner · Posted: Wed Jun 04, 2003 12:23 pm Post subject:

If you have known (on the ground) endpoints of the line and set those as waypoints, you could be pretty close when you place points on that line. However, to project a line on a bearing, when you don't know what grid system the bearing is on is going to give you a poor result at best.

In the survey world it is rare to find any lines a mile long that are perfectly straight. There is almost always a bend of some kind at the section corners and the quarter corners in all the exterior lines of a section. Quarterlines, by definition will be straight from quarter corner to quarter corner, and those are approx. in the mile range. These line are on the interior of the section. JK