Trimble 5600 ??? 💡 ?ÿ

OOPS. I just noticed a typo in the above solution: Chord       Degree     Delta        Radius ...

The linked scans are really hard to read (for me), even with a magnifying glass. Both spirals appear to be Searles spirals (1?ø spiral delta, 3 x 50 ...

Sorry to here this. I met Dr. Schwarz back in 2007 in Silver Spring MD. He was certainly a huge contributor to the science of geodesy. RIP

I've probably related this story before, but here goes; About 30 days after 9-11, I boarded a KLM 747 for a flight from Minneapolis/St Paul to Amster...

ASSUMING that current trends continue??? I suspect that things will start to open up a bit in May here in Southwest Wyoming, but I'm not going to hold...

Just think what the surveyors on Uranus have to deal with! Tilt 97.77?ø relative to orbit... 😯