@geeoddmike?ÿ Thanks. I only wish I had more pictures of Charlie and me. We were calibrating Big Red; I was running the inst., Charlie was moving the ...
@dougie?ÿ Outstanding! I think I might have been there once or twice myself.
@geeoddmike?ÿ ?ÿWe can see immediately that there is 2 errors on the Spec. sheet for "Big Red" 1. Big Red never measured 102 miles. I think that the ...
@loyal?ÿ ?ÿYes I left off the "km" behind the distance of 45,000,000?ÿkm (not 45,000,000 meters). Of course that depends on where Venus and Earth are ...
@dmyhill?ÿ ?ÿBouncing RADAR signal off Venus in the 1960's they measured?ÿ it was 45,000,000 meters away +/- For the Survey of the McDonald Observato...
@jim-frame?ÿ ?ÿSo Jim did you ever GPS the Yolo base line? NGS Appendix #8 for 1882 does not give that much information. I would like to know all abo...
@dave-karoly?ÿ Sorry Dave but that is not true. If you read my post above again you will see it has a?ÿQUESTION?ÿin it for Mike Marks.?ÿNO?ÿone else h...
@mike-marks?ÿ you said "geodetic observations with good targetry and instruments could get to +- 5""?ÿ I find this very hard to believe. Can you expla...
Outstanding MathTeacher : I was wondering when you would post. Hope all is well. JOHN NOLTON
Dave K.?ÿ Adi17 has some coord. that came from someplace which he did not understand (his very 1st post); The X value did not look good to me and I as...
Adi17 thanks for your last post. It clears things up. MGA = Map Grid Australia GDA = Geocentric Datum Australia Now with?ÿ geeoddmike post above an...
@dave-karoly?ÿ ?ÿDave, give your self a rest. Let Ari give us the details of the projection. Also remember that the UTM south of the equator has a + 1...
@dave-karoly?ÿ Don't know what is going on yet with his Coord. He has to come back with more information and then I am sure we can help him. Instead o...
@bill93?ÿ ?ÿThey use Lat, Long and elev. just like we do he in the good old USA; except their Lat. is -(minus) and their Long. is East. JOHN NOLTON
Adi?ÿ ?ÿone thing I see right off is you have something wrong with your?ÿX coord.?ÿPlease check you data. I have one question for you;?ÿ for the?ÿZ c...
@thebionicman?ÿ ?ÿ NGVD came about on 10 May 1973 When NGS gave it that name. Please see the following that might explain it. I think the 3rd par. dow...
@loyal?ÿ ?ÿ ?ÿ ?ÿ ?ÿ?ÿYES;?ÿ ?ÿbut I have not gone yet. I did go to another about one month back and had 1 cold one. Sure miss the old days. Hope covi...
Loyal I got up on NGS web site and checked to see if S.P. 82 by John F. Hayford was there and it was.?ÿWhen you get to the download you will want to l...
@loyal?ÿ ?ÿYou can see a contour of the geoid in C&GS Pub. "Figure of the earth and Isostasy from Measurements in the United States, 1909?ÿ By Joh...
@bill93?ÿ Sorry Bill but your statement about?ÿ NAVD 29 and a geoid model is not correct. NAVD 29 had?ÿNO geoid. There was not enough gravity data. R...
