20 or so years ago we saw 2 to 4 centimeters on extended static observations. These days i routinely get closer to 2 to 4 millimeters using dual base ...
I nominate your post for Best Comedic Posting of 2017. Suggesting that GeeOddMike is confused about any matter geodetic he might choose to post about ...
I am sorry but I don't get any of your problems with those geoid separations diagrams. I have been using base/rover setups for more than a decade in m...
I still have an XP laptop running LDD 2004 without any problems.You have to hand it to Autodesk, with all the various flavors of Intellicad out there,...
I just need to know position of 2 corners. No need to locate the other corners. Will make job go faster & cheaper?
This is the frustrating thing about GPS and elevations. Geoid models were created to shift ellipsoid heights to orthometric elevations.Why use a geoid...
Has anyone made a research onto the thermal expansion rate of the rod spike that is used to mark the BMs? If I remember correctly, it was one of the p...
On the contrary, they were written by men who through experience and determined -- one might say obsessive -- experimentation were able to codify the ...
Again never used invar rods in my life. Weight alone based on specs is 2x or 3x heavier than fiberglass staves.For anyone that has done actual fieldwo...
It's not possible to do a 1st order loop without invarI think you are reading into the old standards. Digital barcode rods are capable of 1st order st...
Have not used invar rods, we got into 1st order work directly using Sokkia digital levels coupled with their fiber glass rods that Sokkia said would n...
Bad closure is proof of a problem. Good closure is proof of nothing - it is the absence of evidence of a problem, not evidence of absence. Errors may ...
Repeated static sessions can readily have errors of less than 1 cmreally? the error brought about by just levelling your base/rover setups and getting...
And in 2 hours you could run a 5 km loop with a stadia board and a hand level and get a First Order closure. But in neither case are you going to be a...
That is not inherent instrument accuracy, it is the accuracy of the survey algorithms.Paul,I have checked static/RTK sessions with level loops (<10...
RTK has a vector limit of ~5km?10km? depending on how good your radios/cell signals are between work & benchmark sites.If distance is too far away...
A dozen OPUS sessions won't return elevations as good as a few RTK ties to good bench markshuh? aren't the data for RTK and static sessions coming fro...
Isn't the purpose of using published elevations from govt benchmarks is that you want your project elevations to conform to a national datum?Meaning e...
Mark,Downloaded the c3d fix and still get the net 4.5 error. Been doing the install/fix for most of the day now and I am getting tired of boot/reboot.