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re: How do surveyors determine elevation of land?
Posted on 8/13/16 at 6:39 am to civiltiger07
Posted on 8/13/16 at 6:39 am to civiltiger07
But bechmarks existed well before satellites. Like 1800s.
Think of another way!
Think of another way!
2
Posted on 8/13/16 at 6:41 am to Pectus
I don't exactly how they were established then that's why I didn't comment on it. I just know how it's done now. Which I think is the more relevant topic for the OP anyway.
Posted on 8/13/16 at 6:45 am to Pectus
Depends on what you are surveying, but the benchmarks I have used have not been there that long. Hell, some of them weren't there when we got there.
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