Hi Chris: And there's the problem that the BM is moving.
Have Fun, Brooke Clarke http://www.PRC68.com http://www.End2PartyGovernment.com/ Chris Albertson wrote:
On Wed, Sep 14, 2011 at 9:52 AM, Jose Camara<[email protected]> wrote:Hopefully it is better than the ones that denied Georgia a piece of the Tennessee river - just about one mile off... Interesting topic in "How the States got their shapes" on History channel.In one sense a BM's position is dead-on perfect. The marker only says "my name is "X" and I am at the position marked by this cross." By definition it can't be in error. Then you look up in some database and find the last surveyed location of the BM. Now that might have an error or not. The location of the marker near me is at the fraction of an inch level now but apparently in the 1940's it was way off by several feet because everyone's property lines are wrong and the city is making people get new surveys if they pour any new concrete foundations. So the accuracy of the same BM can change over time as it is re-surveyed using better methods Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
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