Comparison of Mobile LIDAR Technique with Terrestrial Methods in Digital Map Production

Abstract

Terrestrial methods and photogrammetric method are generally used in the production of maps. In recent years, along with these two methods, the Mobile LIDAR (Light Detection and Ranging) technique has begun to be employed in the production of maps. The Mobile LIDAR technique has some advantages and disadvantages. The most important advantages of the system is it’s speed and it’s capability of scanning millions of points called point cloud in a very short time. Topographic structure and superstructure of the project area should be suitable for Mobile LIDAR technique. Besides, the cost of the system is very high and data storage problem can not be ignored. These can be listed as the disadvantages of the system. In this study, the maps of the same region produced by terrestrial methods and Mobile LIDAR technique are compared in terms of spatial accuracy and the accuracy of the Mobile LIDAR technique was examined. Approximately 30,000 detail points were measured by both methods and horizontal coordinates and orthometric heights were calculated. The differences in the positions of these 30.000 detail points obtained from both methods were lower than the limit values specified in the Large Scale Map and Map Information Production Regulation of Turkey. This means that the accuracy of the detail point locations measured by Mobile LIDAR is acceptable.

Keywords: Mobile LIDAR, Digital map production, GNSS, Terrestrial methods

DOI: 10.7176/JSTR/5-3-21