An experiment was done in one grid shaped street and one irregularly twisted street. There were two ways to memorize forms in the experiment : a real walk through the pathway or a CG animation presented walk through the same pathway. After memorizing the course, the subject walked the pathway by himself. The subjects were 40 (25 males and 15 females).The errors in the angles, concerning a real walk through the irregularly twisted street, were the biggest .However.the errors in the angles between the standard lines and the line, connecting each comer with the starting point, were the smallest.During the real walk the irregularly twisted street resulted to be easily legible, because the error of the angle could be adjusted delicately in the process of walking.