What exactly is photogrammetry technology?

This is a surveying technique combining photography and triangulation.

Stereo photography refers to a photographic method to express the three-dimensional space of a scene. By shooting multiple images from different viewpoints, a three-dimensional scene can be simulated.

Triangulation refers to laying a series of continuous triangles on the object (ground), adopting the method of angle measurement, and using trigonometric function to calculate the positional relationship between corresponding points such as distance, angle and height.

Stereophotogrammetry refers to triangulation of stereophotogrammetry. This technology must rely on the powerful computing power of computers. Can save a lot of manpower and material resources.