?￠????n Vergelyking van satellietbeeld-akkuraatheid in die gebruik van alternatiewe grondkontrolepunt-metodes tydens die toepassing van ortokorreksie

摘要

Accuracy comparison of satellite images using alternative ground control points (GCPs) through performing orthorectification. The accuracy of ortho-images has always been an intriguing subject. a??When is the pointing accuracy of an ortho-image suitable?a?? This study evaluates the influence of two types of ground control point sources on the accuracy of ortho-images and presents valuable recommendations towards conducting orthorectification.