Triangulation

This feature allows you to calculate the location of an unknown point given the angles at the 3 vertices of  the triangle formed by the 2 known points and the unknown point.
Enter the point ID of the first known point then the point ID of the 2nd known point (the backsight) and the measured horizontal angle to the unknown point.  Do the same for the 2nd known point backsighting the 1st known point.  Next, if available, enter the angle between the 2 known points with the instrument at the unknown point. The standard deviation and other information for the calculation will be printed at the command line and written to the print file. The calculated point will be saved to the coordinate file using the Saving Point dialog (Shown Below).

Prompts

Enter first instrument point: Enter a point ID or pick a point symbol on the screen.
Enter first backsight point:: Enter a point ID or pick a point symbol on the screen.
Enter first horizontal angle to unknown point: Enter an angle.
Enter second instrument point: Enter a point ID or pick a point symbol on the screen.
Enter second backsight point: Enter a point ID or pick a point symbol on the screen.
Enter second horizontal angle to unknown point: Enter an angle.
Enter horizontal angle at unknown point or <skip> <0.000000>: Enter an angle if available or press Enter to skip.

Pulldown Menu Location: CG-Survey > Cogo
Keyboard Command: cg_triangulation
Prerequiste:  coordinate file