False negatives occur if an observation containing a real error is accepted by the testing procedure. False positives occur if an observation is rejected while in reality there is nothing wrong with it. In general one tries to avoid 'false positives' or 'false negatives' as much as possible. * TESTING => procedures to identify possible errors in your observations. It is a result of your instruments' specifications and, of course, you should take your observations under good conditions. Precision is something you cannot do much about. * PRECISION => the propagation of measurement noise (not errors) into the coordinates. The specialty of the Delft School lies in the quality control. Least squares is least squares, That is when it comes to coordinate computation in regular (1D, 2D or 3D) survey networks. There is nothing mysterious about the 'Delft School'. Related Question for the Resident Geodesists I would appreciate hearing from anyone who uses Move3 a lot. I am willing to pay for an excellent program that is being maintained and improved all the time. Some might think that Move3 is pricey, but for the type of work I do I use LSQ everyday, it is a critical component to my work. I cannot recommend Geolab to anyone anymore because of this. To me, it is very unfortunate that such a great program (Geolab) has stagnated. Well, since then it has done the same thing on 3 computers and my laptop. I reported this to him, he said it must be the graphics card on my computer. One issue I have with it is that I cannot view network diagrams, it causes the program to blow up. The developer always promises that there is a new release coming soon, but it never happens. It is a very robust program, and I trust the results.

They seem to be very responsive to suggestions and bug reports. But, I do follow them on linkedin, and I see that they are constantly making improvements. I had a lot of problems getting it to work they way I wanted it to. I did buy a demo ($149, they send you a key to use for 60 days) a few years ago, at that time I didn't like it enough to make the change from Geolab.

Microsurvey starnet compatibility