Use the Orthogonal Calculation function for orthogonal surveying. The base element is represented by either an existing line or by using two points which can lie aside. When the calculation is performed, measured and calculated dimensions are taken into account.
Orthogonal calculation elements
When you use Orthogonal Calculation or Arc Intersection, you optionally create dimensioning for the calculated points. In the construction dialog box, under Save Options, select Save The Dimension Features.
You can use Orthogonal Calculation to measure distances. See Constructions: Tips and Tricks.