Property corners are (re) set based on recorded deeds, historic surveys, and surrounding property markers. All the historic inaccuracies of previous surveys have to be factored in when setting the location of the corner. This is an issue for registered land surveyors and lawyers, not fancy tools like GPS. There is considerable interpretation and judgement required.
Ordinary handheld GPS units, even with WAAS, are accurate and repeatable to 12 feet or so best case. Only differential GPS, with a base station over a known point, has much use in survey work, and this is usually used for construction and intra-parcel work, not setting property corners. Yes, you could use differential gps to come back and find a property corner, and to check whether it had been tampered with, but not to set it.
The everyday tool of the surveyor is the total station, which is basically a combination of an theodolite and electronic distance measurement.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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