Geospatial information is data on the position of natural and artificial objects existing in space and is usually displayed in map form. Recently, virtual reality (VR) and augmented reality (AR) technologies have been utilized in various fields, and the importance of constructing three-dimensional spatial information as a basis of these technologies has increased. Light detection and ranging (LiDAR) technology is increasingly used to acquire data on terrain. Because LiDAR can generate a high-density point cloud while saving time and manpower consumption, it is increasingly utilized for 3D model building, measurement of structural deformation, and drawing construction for building maintenance. On the other hand, unmanned aerial vehicles (UAVs) are increasingly used for acquiring building geospatial information. In this study, geospatial information construction using UAV images and UAV LiDAR data was performed. Fixed-wing image acquisition and processing using UAV were performed. Data acquired using UAV LiDAR were used to construct a digital surface model (DSM), and the accuracy and characteristics of images and LiDAR data were analyzed. In the future, the construction of DSM using UAV LiDAR will greatly increase the efficiency of related field work.
Recently, the design and operation of buildings and various ICT technologies have developed and the interior space has become larger and more complex. As a result, a variety of activities such as convention, shopping, and entertainment are carried out without moving outdoors and the cost of living in the indoor space is gradually increasing. In addition, as the services for indoor space are diversified, research on technology for construction of effective indoor geospatial information is needed. In this study, the characteristics of 3D laser scanner which is widely used for spatial information construction was investigated. 3D laser scanner for construction of indoor geospatial information can be divided into static scanner, mobile mapping scanner and handheld scanner. Mobile mapping scanners and handheld scanners provide continuous data acquisition compared to static scanners, and efficient data acquisition is possible. In terms of accuracy, the static scanner showed less than 1mm noise on the wall, and the handheld scanner showed about 40mm noise. The application of 3D laser scanner to indoor geospatial information construction considering the work flow and accuracy of related regulations is suggested. If the scanner is selected for the purpose of the indoor geospatial information that is intended to be deployed, it will be possible to establish the indoor space information effectively, considering the work efficiency or accuracy of the performance.
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