Larry Best, post: 395080, member: 763 wrote: Loyal, I think you assume that all surveyors use GPS. Maybe in Wyoming, they do. Plane Surveying assumes a flat earth.
Since when?
Maybe in pancake land, but here in the West, Total Station work MUST be corrected (adjusted) based on "round Earth" realities.
Just say'n
Loyal
In considering all the above comments, I like the above comment about using roof tops.
Also, an "Urban Canyon" can have differing degrees of "Urban Canyon". A real boxed in one... that would not be GPS able.
One that is 2 story and 3 story houses on the sides, and has pretty good street between... that should work in the street.
I would not hesitate to GPS an "Urban Canyon" in Arkansas... but if it has those 10+ story buildings... well we are maybe better to use other means.
I will say this, I have tried VERY hard to get the LS to lie to me. When verify is on, and when 2+ minutes are set, I have YET to get a lie out of it.
But, efficiency? Some places are more efficient, with more conventional means.
I can see a bracket on tall buildings, hanging off the side. And a 32 oz plumb bob, and a coffee can of oil, to stabilize the plumb bob at the bottom. Center the plumb bob in the 1 gallon coffee can, with 2+ inches of oil in the bottom. Draw a circle with chalk on the conc. Make a small scribed mark, and you now have a pretty good X-Y coord. Vertical ... hmmm how tall is that building? 200' tape... vertical taping... I have not done that, but I'd do it in a heart beat!
N
