In order to find evidence to pin the coordinates do not know all the 22 pins to compare the bias value coordinates (E, N) and bias because of the distances that occurred.
To find the coordinates pins evidence that all 22 pins are unknown to compare the accuracy of the coordinates (N, E) and errors that occur because of the distance.
The evidence is still unknown coordinates pins all values 22 pins. To compare the errors of the coordinates (N E), and because of the distance error occurred.