The terrestrial photogrammetry can be divided into how many branches?

Concept:

Terrestrial photogrammetry: 

• Terrestrial Photogrammetry uses photographs taken from different angles to create a three-dimensional representation of an object or scene, which is then measured and analyzed.
•  In terrestrial photogrammetry, photographs are taken with the camera supported on the ground. 

The terrestrial photogrammetry can be divided into two branches:

1. Plane-table photogrammetry     
2. Terrestrial stereo photogrammetry

Plane table photogrammetry:

• ​The plane table photogrammetry consists essentially in taking a photograph of the area to be mapped from each of the two or three stations.

Terrestrial stereo photogrammetry:

• In terrestrial stereo photogrammetry, due to considerable improvement of accuracy obtained by the stereoscopic measurement of pairs of photographs,
• The camera base and the angles of intersection of the datum rays to the points to be measured can be considerably reduced since the camera axes at the two stations exhibit great similarity to each other.