@mathteacher Your 2nd and 3rd line above is what I get also using Mathematica V10.0 (I do have a later version but have not put in on the computer ye...

@mathteacher Thanks MathTeacher. I was just going to TRY to graph it but now I have an idea what it looks like.   JOHN NOLTON

Dave, something is strange with your equations. I get the same results that MitchPDT gets. Can you tell us where you got the equations? Can you check ...

Dave; do you want a "long hand solution" or "computer solution" ? JOHN NOLTON

@mike-marks Some Instrument operators are better than others, that's just the way it is. There is no doubt in my mind that Larry Scott and A. Harri...

@geeoddmike I am referring to geodesy in the USA (which I should have put in just for you). Here in the US  it was not till Feb. 10, 1807 that t...

@mathteacher In the years between 1830-1850 Geodesy was in its infancy. I think the only way to compare the old positions with the new is to get fro...

TO: MathTeacher:?ÿ I kept thinking I had another book by Frederick Pearson II but could not find it on my bookshelf. So after dinner I came back and l...

TO: MathTeacher, I forgot to put this in my post above. ?ÿJ.R. Clynch's 6 page paper (in my opinion) is not that good. After you read Pearson's work ...

To: MathTeacher?ÿ?ÿ?ÿ your request (see your 3 line down) about James R. Clynch's radii is very Trivial. For you it would be better to read Map Projec...

Glad to see Dave Lindell ?ÿpost his solution to the "Arc and Chord" problem that MathTeacher posted. This is a common problem in surveying and I was h...

@mathteacher third place of WHAT ??   JOHN NOLTON

@mathteacher In Dave Lindell post the cartoon id using Degrees and decimal of a degree. In your NGS inverse you are using Degrees minutes and second...

@loyal You can't measure to 2ppm so it will be OK------- KEEP WORKING.   JOHN NOLTON

GeeOddMike ?ÿI have been following your ?ÿpost?ÿ and reading the comments and would like to add some comments myself. #1, its to bad you had an error ...

Great condition must mean everything is working like new? If so how much are you asking? Thank You, JOHN NOLTON

@geeoddmike The test report for the Macrometet Model V-1000 Interferometric Surveyor is Dated May 1983, FGCC Report: FGCC-IS-83-2 and was done by La...

@geeoddmike The TurboRogue was the top of the line GPS unit in the day. They were made in Westlake Village, CA and cost around $25,000. One of USGS ...

First GPS unit;?ÿ?ÿ 1984?ÿ ?ÿMacrometer ?ÿV-1000 Interferometric Surveyor with Geo/Hydro JOHN NOLTON