CST Level 1 Land Surveyor Certification Practice

What role does a stereoscope play in surveying?

1. To measure angles between two points

2. To adjust for perspective differences in 2D images

3. To compute distances between surveyed points

4. To act as a type of surveying instrument

The correct answer is: To adjust for perspective differences in 2D images

A stereoscope is utilized in surveying primarily to adjust for perspective differences in two-dimensional images. This instrument allows surveyors to view two slightly different images side by side, creating a three-dimensional effect. By providing depth perception, a stereoscope helps surveyors better analyze topographical features, elevations, and spatial relationships between various points on a map or image. This adjustment for perspective differences is particularly important when interpreting aerial photographs or other forms of imagery used in surveying. The ability to visualize terrain in three dimensions can lead to more accurate assessments of land features, which is essential for effective planning and decision-making in land development projects. While measuring angles, computing distances, and other functions are vital to surveying, those tasks typically involve different instruments, such as theodolites or total stations. Therefore, while those functions are important in surveying, they are not the primary function of a stereoscope.