XComThrowawayAcct

XComThrowawayAcct t1_j2a8zkm wrote

The survey marker serves as a verified control point. When on site, it’s the one point you know it’s location to within acceptable tolerances. Everything else on site — everything — is measured trigonometrically relative to that point.

(These are not used anymore because we have GPS now. It provides a virtual survey marker almost anywhere, any time. We are living in the future.)

3