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P.S. The send message function on this site doesn't seem to be working?
If your site is large then a GPS would be most suitable because of the range that you can acheive without continual Intsrument set-ups.
If, however, you were to be working a smaller site then the Total Station would be fine.
I dont think the laser scanners can set-out a particular point ( the manholes that you refered to,) , but I could be mistaken on that.
Let me know how you go.
Darren
Noble Consulting Surveyors
But most don't need that much technology for quantities, it would depend mostly on what accuracies you were looking at, as well as speed. Terramodel with a GPS base and rover, an S6 robot, or 5600 robot even, combined with Survey Controller make for an awesome team for quantities. It doesn't even need to be Survey Controller, just something that can save point files as ASCII, CSV, or TXT. Bring in the points, create a surface from them and compare the 2 surfaces in just minutes of post production work.
I'm a big Trimble fan, but this is only as far as GPS and Robotics goes, I haven't used their scanner to compare.
I personally like Trimble units, recently priced a full RTK system at around $60k (AUS) but you can also hire them.
Other brands which would be just as effective include TopCon & Leica. There are some others but these are the main players as far as I know.
I hope that this helps.
Darren
Noble Consulting Surveyors