Fundamentals of Surveying (FS) Practice Exam

The mapping angle in a Lambert projection varies predominantly with which parameter?

1. Longitude

2. Latitude

3. Both latitude and longitude

4. None of the above

The correct answer is: Longitude

In a Lambert projection, the mapping angle is primarily affected by the latitude. This projection is designed specifically to minimize distortion in specific regions by keeping certain characteristics stable, which often means that the angles measured at certain latitudes will remain consistent. While longitude can influence position and spacing on the map, it is the latitude that is the crucial parameter when determining the mapping angle in a Lambert projection. The projection is typically configured to have standard parallels—these are specific lines of latitude where the projection is most accurate. As you move away from these parallels, the angle distortion increases, illustrating that the mapping angle is fundamentally influenced by latitude. Thus, the correct understanding is that the primary factor influencing the mapping angle is indeed latitude.