What measurement method uses a laser-based instrument to record distances and angles?

The measurement method that utilizes a laser-based instrument to record distances and angles is known as Electromagnetic Distance Measurement (EDM). This technology is pivotal in surveying and is widely used for its precision and efficiency in capturing spatial data. EDM operates on the principle of measuring the time it takes for a laser beam to travel to a target and return to the instrument, allowing for accurate distance calculations.

In addition to distance measurement, EDM can also incorporate angle measurements, providing comprehensive data for various applications in architecture, engineering, and construction. The accuracy of EDM is crucial for high-stakes projects where precise measurements are required, such as in land surveying and site analysis.

While surveying is a broader field that encompasses various methods including EDM, triangulation, and topographic mapping, it is EDM specifically that employs laser technology for measurements. Triangulation refers to the method of determining the location of a point by measuring angles from known points, and while it can enhance accuracy, it does not inherently involve laser distance measurement. Topographic mapping deals primarily with the representation of terrain features rather than the specific measurement technologies used. Thus, the specific mention of laser-based instruments aligns directly with EDM.