Which of the following best defines the function of photogrammetry?

The function of photogrammetry is best defined as taking measurements from stereo photographs. This technique involves the use of photographs taken from multiple viewpoints, allowing for the extraction of three-dimensional information about objects and terrain. By analyzing the overlapping images, photogrammetrists can accurately determine distances, elevations, and other spatial relationships necessary for generating maps and models.

While analyzing physical photos to gather data is a component of photogrammetry, it does not capture the full scope of the method, which specifically emphasizes the measurement aspect derived from stereo images. In photogrammetry, the primary goal is to utilize the geometry of the stereo view to ascertain precise measurements rather than merely assessing images. Thus, the emphasis on taking measurements from stereo photographs provides a clearer and more accurate definition of photogrammetry's function.