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랜드마크 정보 제공을 위한 실내위치측위 지원 시스템 구축에 관한 연구
남옥우 ( Ock-woo Nam ),신창수 ( Chang-soo Shin ),최윤수 ( Yun-soo Choi ) 한국지리정보학회 2023 한국지리정보학회지 Vol.26 No.4
Recently, various positioning technologies are being researched based on signal-based positioning and image-based positioning to obtain accurate indoor location information. Among these, various studies are being conducted on image positioning technology that determines the location of a mobile terminal using images acquired through cameras and sensor data collected as needed. For video-based positioning, a method of determining indoor location is used by matching mobile terminal photos with virtual landmark images, and for this purpose, it is necessary to build indoor spatial information about various landmarks such as billboards, vending machines, and ATM machines. In order to construct indoor spatial information on various landmarks, a panoramic image in the form of a road view and accurate 3D survey results were obtained through c 13 buildings of the Electronics and Telecommunications Research Institute(ETRI). When comparing the 3D total station final result and the terrestrial lidar panoramic image coordinates, the coordinates and distance performance were obtained within about 0.10m, confirming that accurate landmark construction for use in indoor positioning was possible. By utilizing these terrestrial lidar achievements to perform 3D landmark modeling necessary for image positioning, it was possible to more quickly model landmark information that could not be constructed only through 3D modeling using existing as-built drawings.
문석현(Moon, Seok Hyun),남옥우(Nam, Ock woo),최윤수(Choi, Yun Soo) 한국측량학회 2023 한국측량학회지 Vol.41 No.6
Today, it is widely used in important decision-making through design based on 3D drawings and the final results through 3D modeling, rather than designs based solely on 2D drawings. This is a positive function of the digital twin. Currently, 3D spatial information modeling can be acquired with a variety of equipment depending on the purpose. The various purposes include those that require rapid acquisition, those that require high accuracy and precision, and those that increase or decrease the resolution of data that will determine the quality of the data. The 3D modeling construction equipment that makes digital twin possible allows acquisition of data by appropriately converging LiDAR(Light Detection And Ranging), GPS(Global Positioning System), IMU(Inertial Measurement Unit), and cameras according to the purpose. Currently, terrestrial LiDAR is a product that shows high quality and high accuracy by converting indoor spaces into digital twins. In order to secure high location accuracy in indoor spaces, terrestrial LiDAR is used using T/S (total station) used in existing surveying. Research has been conducted to verify the location accuracy of the data acquired, and high-quality indoor spatial information has been produced by creating 3D modeling based on the verified accuracy. In this study, we compared the acquisition speed and data processing speed of two types of newly researched and developed mobile scanners in the same space, using terrestrial LiDAR, backpack-type laser scanner, and hand-held laser scanner, and compared based on terrestrial LiDAR. We verify the performance and conduct research on the use of 3D modeling using the acquired 3D Pointcloud. As a result of the study, it was confirmed that the point cloud created by each laser scanner shows a certain level of error and that 3D modeling can also be used.