True or false. For each “False” answer, explain why the statement is false.

a)     In the equation, a = kMA, a refers to the ground vector.

b)     The relationship between the image space coordinate system (x,y,z) and the ground coordinate system (X,Y,Z) can be determined by the XYZ of the perspective on the ground.

c)     A minimum of four GCPs is required for orthorectification of an image.

d)     An image with a central view of the ground is known as an orthophoto.

e)     A DEM is used during orthorectification to correct terrain distortion.

f)      Ground control points are used during the Calculate Sensor Model (bundle adjustment) step to calculate exterior orientation, establishing a relationship between the image, camera, and ground.

g)     The distance between the perspective centre and the principal point is known as the image plane.

h)     Radial lens distortion is always symmetrical around the fiducial centre.

i)      Yaw produces a displacement of the image centre/flight line.