Camera composition settings
Step 1：Adjust height and Angle
Height is best between 1100 and 1300. Camera Angle better keeps 0 degrees.
Step 2： FOV(Field of view) and crop
For an overview spatial representation, 60-80 of FOV degrees performs best. The 0-30 degree FOV is suitable for partial rendering. The view can be used in conjunction with camera clipping to make it easier to find good angles.
Step 3：Choose composition
The tool provides four different compositions, with 16:9 and 4:3 being the most commonly used. Detail representation can be used 3:4.
Step 4: Save the view
A very practical and important function, when you adjust a satisfactory perspective, keep in mind to save. (Ctrl+D as Shortcut)
Clipping: create a realistic view
Camera Correction:
A rectification method for perspective images of scene planes using multiple constraints was proposed in this paper without knowing any camera parameters.