California Civil Engineering Surveying Practice Exam

In plane surveying, a line can be broken into two directional components: departure for the east–west part and latitude for the north–south part. Departure is defined as the distance projected onto the east–west axis, with east taken as the positive direction. That makes it the term that matches “the distance of a line in the east-west direction, with east positive.” The other terms refer to different concepts: a digital orthophoto is an image product, a datum is a coordinate reference framework, and a data collector is a field device for storing measurements.