Evaluation of accuracy of horizontal position on spatial information

Abstract

This paper proposes a method to evaluate accuracy of horizontal position on spatial information. First of all, we introduce an assumption that errors of positions on GIS data obey two dimensional normal distribution (T.D.N.D.). Then the paper shows that a vector obeys T. D. N. D., if both ends obey T.D.N.D. independently. It also shows the method estimating accuracy by comparing positions of the same point on different kinds of spatial information. Finally, a case study of pictures by SPOT satellite is done using the method.