WGS84 to NAD83 is maybe 3 ft. And with all of the consumer units I've checked, it doesn't matter whether you set them to WGS84 or NAD83 because they ...

They love open sky, which Kent probably had. Still, that seems better than I'd expect. I did some fixed location tests with hours of data over sever...

No iron because most of them were set before magnetic locators were available to surveyors.

Like everything - yes, no & maybe>1952 subdivision where 'scribed spruce' were set as the original cornersAnd I'll bet the plat doesn't even cl...

I think the OP is doing this as a hobby or educational project, not a profession, so won't likely be buying a pro package.As I mentioned before, Star*...

Chord 25.000 gives arc 25.00286, so over the full length you'll be off by about the magic number 0.04 between arc and sum of chords.The radius looks l...

My newer textbook gives the formulas for correction in feet h' = 0.667 (Miles)^2 = 0.0239 (feet/1000)^2and in metric h' = 78.5 (kilometers)^2 corr...

All the discussion of the track adjusting into a spiral makes sense, but if you eyeballed the result and tried to fit a simple circular curve it would...

Matlab is somewhat pricy. You might look into freeware clones that offer somewhat similar capabilities, including Scilab, Octave, Rlab and SciPy.See ...

Dave's answer is good. I'll be more long-winded.Least squares is applicable at any level of precision. Its main strengths are the ability to accommo...

As Ralph mentioned, to reduce typical surveying data you have to linearize the equations for distance and angle/bearing by using the partial derivativ...

>10 each 850mAh NiMH cellsJust so you don't get confused in looking at someone's catalog: It looks to me like the 850 mA is the recommended charge ...

If you start with 3-15-00 railroad degree of curve, and 23 degree delta, I concur with Robert Locke's numbers except that his length is the arc length...

Is this a just cautionary fear or documented occurrence? I doubt a cow would down a 60d nail. What does the plastic do to them, poison, clog up their...

If you are worried about movement in a suspension, I wondered about the problem of keeping the antenna rod vertical.You're okay with a moderate height...

I always felt the world was somehow cheated when they sold off the measurement line as Agilent and kept the HP name for the computers. HP back in the...