After analyzing the data, a 3-dimensional similarity transformation applied separately for both strip including all the targets was found to be adequate for the correction of the lidar data (more details can be found in Csanyi et al..,2005) the last three columns of table 2 (a) and (b) show the residuals at the target locations after the transformation. the transformation significantly decreased the vertical coordinate errors and they are approximately in the range of the vertical accuracy of the determined target coordinates. The horizontal coordinates did not change much at the targets where the detected differences were originally in the range of the horizontal coordinate determination accuracy ; however, at the few targets where the determined errors were significant, an improvement was experienced.