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Old 10-12-2011, 04:53 PM
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Converting the intersection of two compass readings to GPS Coordinates

If nothing else I should get an award for the longest thread title.

Google has failed me, maybe because I used the wrong terms.

If I am looking at a very old land survey and I want to find the gps coordinates for the intersection point of a compass reading of
N 4 degrees 44 E
N 72 degrees 00E

Or am I just reading this stuff all wrong?

I was never a Boy Scout.

There are some South and west readings offset from the point of beginning. The coordinate I am actually asking about is a mid point (one corner) of the entire track.
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Old 10-14-2011, 03:28 PM
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Is that N 4 degrees 44 E as a location or as a vector? You can't "convert" a vector into a "GPS coordinate" (a location). A vector is really just "go in this direction way from here".

If they're vectors, you have to know the starting point for each. Then there are formulas you can use to get the location of the intersection. That will be the same as what you call the GPS coordinates.

(+4 latitude, -72 longitude or whatever the numbers are, is a "GPS coordinate".)
 
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Old 10-14-2011, 03:37 PM
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After a good bit more research I figured out they are indeed vectors and absolutely worthless unless you can locate one of the pins. All you need is one pin to recreate the entire layout.

You can bet your savings on the fact I will drop a gps marker if I am lucky enough to find one. If the weather holds I plan to go pin hunting on Saturday. Finding any will save me a ton of money if I ever get a real survey done.

If this weren't out in the boonies I would just pay the surveyor right now but those oh so reasonable rates go up quickly out of town.
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