Last seen: April 9, 2026 5:20 pm
I believe the first longitude survey that traversed 360 degrees by telegraph was completed around 1906. Something like a 10-15 year project.
John Hamilton, post: 381528, member: 640 wrote: People don't realize that latitude determination is an "absolute" thing, whereas longitude is always w...
And the 1892 longitude of DC, I believe, is another additive reason that the 1896 survey was high science. Not the disappointment that was in the arti...
An article like this goes to show why geodetic survey is a profession. And that just anyone with a GPS receiver is not a surveyor. It insults the skil...
The client obviously wants 20 m contours.Maybe he thinking contours 20 m apart horizontally?
If there are "many" GPS stations, then you have both triangles and base lines. All of those stations should be observed relative to each other and an ...
WGD, post: 378575, member: 8001 wrote: You wanna turn angles on the cheap? Forget the compass, use the tape and measure the diagonals. As long as not...
For $100, backyard practice, you might stick with graph paper and protractor, and DraftSIGHT. But, with a nice little instrument, construction grade t...
5 years ago? I'll check my notes. Ah ha! That explains it!
However, I think it's reasonable to assume that Saturn would return as good a result as did Jupiter. And between the two, you have options. So, using ...
Larry Scott, post: 375271, member: 8766 wrote: I looked at Bob's observations, and some advice on observation and reduction.This isn't a whole lot of ...
The floating target is classic.1925 Royal engineers:
I think it's 3.The do-not-cross-this-line, even if by restraining order. You (policeman onsite) have been asked to mark the location of 'this' line. T...
Back on the day when all receivers were L1, all measurements were relative. dX dY dZ mark to mark. At a 1000', using a pair of receivers, long obs (an...
((Your current az observation is easily good enough. But there will differences, probably small. And a constant is best case scenario. So, your probab...
Assuming the neighbor's survey is accurate within expected tolerance. And is cited as SPC bearings.Your survey of the common lines will probably have ...
I don't believe opus will process L1.
JOHN NOLTON, post: 373439, member: 225 wrote: rfcI would like to make some comments on your work.1. When you do astronomic work it is best to have you...
Basis of bearings: by stellar observation.
I think the USC&GS has always been metric.I didn't find a single technical chart, table, or reference to feet, or Fahrenheit. Even the graphic sca...