By using the ground points and image points in pervious work, we can calculate the six parameters of affine transformation. With these parameters, the ground coordinates can be transform in to image coordinates. In this homework, we compared (1) different terrain types with same GCP number. (2) Same terrain type with different GCP number. (3) Same terrain type with same GCP number but different distribution. Then, try to find out why the result will different.

Keywords: Affine transformation, Ground control point.