How do I perform a resection with GeoLab?
Many traditional computations can be performed with GeoLab, including resections. A resection is the determination of the coordinates of the instrument station when the angles between three control stations are measured. To perform a resection with GeoLab, you simply create a GeoLab input text file with the coordinates of the control stations defined and the angle measurements given. GeoLab will do the rest when you process this file with the Network/Process menu command. Note that for the resection problem to have a solution, the three controls points and the instrument point must not all lie on the circumference of a circle. If you try such a situation with GeoLab, you will receive a message saying that the adjustment is singular (no solution). An example GeoLab input text file, resect.txt, has been prepared to illustrate in detail how to perform a resection with GeoLab. Note that you must rename this file with an IOB extension if you wish to process it with GeoLab.
