Define Photographic Survey: It is also called photogrametry. It is a method of surveying in which.

. Define Photographic Survey: It is also called photogrametry. It is a method of surveying in which plant or maps are prepared from photographs taken from Suitable camera station. It is divided into two. Terrestrial photography Aerial photography 18 2. What do you mean by Equilibrium Theory : The earth is covered all around by the ocean of uniform depth. The ocean is capable of assuming the equilibrium.