Radius of curvature - there is a problem here.Several clarifications: 1. I too get things mixed up. The older I get the more time I need to spend che...
Radius of curvature - there is a problem here.Little h as shown on the diagram is called "ellipsoid height" and is the distance above or below the ell...
Radius of curvature - there is a problem here.The following links may help in seeing the difference: 1. Shows coordinate systems 2. Shows same things ...
See #2 this link.
For What Purpose or how close is close enough?I applaud the fact you are sorting it out because you want to decide for yourself. Several comments, su...
Radius of curvature - there is a problem here.There is a problem here. The geocentric "Z" you've computed is the perpendicular distance from the equa...
KentUsing the GSDM puts you right on the ground as you wish!
I'll say it again, the global spatial data model (GSDM) provides a simple efficient way to handle 3-D data (GPS, total station or both) without map pr...
I apologize if this answer is too long - but I am "teaching how to fish instead of giving you a fish."I agree with Ingram that we need to take profess...
Time for true confessions . . . I completed my Masters Degree on Map projections in 1980. The foot/meter discussion was on the front burner at NGS at...
This is one of the threads that I will archive for reference. There are numerous good points made and I'll add the following: 1. I believe that ther...
Retired - sporadic
In addition to surveying (both technical and legal) textbooks and Kelly's list, I would add: 1. The Mapmaker's Wife by Robert Whitaker is a true (lov...
Recognizing that the value of advise correlates to the price paid for it, I offer the following comments/questions/suggestions: 1. You've asked membe...
I agree with Cliff. Given the opportunity, I'll lobby against permitting use of such tools. The licensing exam should test the mental ability (capaci...
Wendell,Thanks for the summary. I can especially relate as I lived in Oregon for 15 years and made many friends (surveying and other) during that tim...
State Plane Coordinates are Alive and WellKent - with regard to boundary surveys, I invite you to read and understand a real live example which ends...
State Plane Coordinates are ObsoleteShawn,I should avoid promoting the book I wrote on this site but you should know: 1. Practially everything in th...