Joseph Gray wrote: > Let me first say that I don't know anything about surveying. I have a copy > of the plat survey for my house. On the survey are four sets of coordinates > that resemble lat/long numbers, but obviously aren't. What are these > coordinates and is there any way to calculate a lat/long of a specific point > on my property from these numbers? If so, how accurate could I expect the > result to be? I assume that a professional survey should be highly accurate. > > Any pointers to information on doing this would be appreciated. > Where are you? Some countries (for example the UK) have their own grid system. A survey should be accurate to around 20mm +/- 50ppm - see http://www.acsm.net/alta99.pdf
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