What is the main purpose of aerial triangulation with method at present?

The purpose of this measurement is to provide absolutely oriented control points.

Aerial triangulation is a survey method that encrypts control points indoors according to a small number of field control points in stereo photogrammetry, and obtains the elevation and plane position of the encrypted points. Its main purpose is to provide absolute direction control points for regional mapping lacking field control points.

That is, using continuous aerial photographs with certain overlap, according to a small number of field control points, the corresponding route model or regional network model (optical or digital) in the field is established through photogrammetry, so as to obtain the plane coordinates and elevation of the encrypted points. Mainly used for topographic mapping.