[sac-forum] GPS and your lot
- From: "Dan Gruber" <dgruber@xxxxxxxxxxxx>
- To: <sac-forum@xxxxxxxxxxxxx>
- Date: Wed, 31 May 2006 11:28:10 -0700
Stan, how about taking a step back here? We tend to think that GPS is
the answer to all of our questions, when sometimes it isn?t. The key
here is to define the objective. Why do you need to know ?the location
of the sides of [your] lot? to a high degree of accuracy? Suppose you
only knew the locations to ±10 feet, say, which is within hand-held GPS
accuracy. What would be the consequences of a 10 foot error? Next, is it
the location that?s important or the distance of each side of your lot
from some other fixed point, or perhaps the distance between the two
sides of your lot? Distance can be measured very accurately with a laser
rangefinder or even a metal tape measure. Finally, let?s not forget
trigonometry. If you can find a known survey point nearby, a rented or
borrowed surveyor?s transit can be used (with a little trig) to very
accurately locate the sides of your lot.
I know some of these ideas are obvious, but since mm GPS accuracy isn?t
easy to get it?s worth exploring alternatives.
Good luck.
Dan
Dan Gruber
dgruber@xxxxxxxxxxxx
home (480) 951 - 6877
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