What is the * * * surface condition equation? What problems can be solved in photogrammetry by using it?

The relative orientation relation of image pairs: all the rays with the same name in an image pair must satisfy the condition equation of image pair intersection, that is, the plane condition equation of the rays with the same name. Using this conditional equation, we can solve the relative orientation elements of the image pair, thus calculating the spatial coordinates of each model point and analytically establishing a single three-dimensional model of numbers.

Analytical aerial triangulation has been widely used, and digital terrain model technology and analytical cartographer will be gradually popularized. Analytical photogrammetry principle will be widely used in topographic and non-topographic photogrammetry, geometric correction of remote sensing images and other fields, laying the foundation for the automation of photogrammetry.