• 한국지리정보학회지
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• 제22권3호
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• pp.120-132
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• 2019

현재 자율주행차의 위치결정을 위한 핵심 인프라인 정밀도로지도는 전 세계적으로 자율주행차 탑재 및 서비스 부문에 대한 연계를 위해 노력하고 있다. 글로벌 기업인 Here와 TomTom은 정밀도로지도 생산에서 자율주행차 탑재까지 일련의 체계를 민간기업 중심으로 구축하여 독일 3사(BMW, Audi, Daimler)와 협약을 체결하였다. 일본은 2017년부터 민관이 협력하여 DMP(Dynamic Map Platform)를 조직하고 민간중심의 정밀도로지도 공동구축을 수행하고 있다. 한편, 우리나라 자율주행차 관련 기업들도 차량, 센서, 지도 등 다양한 기업들과 협약을 체결하여 협력하고 있지만 민간과 공공이 개별적으로 정밀도로지도를 구축하고 있는 실정이다. 따라서 국토교통부에서는 기관과 기업의 중복투자 방지, 신속한 정보갱신 등 정밀도로지도의 발전을 위하여 2019년 4월 민-관 협력을 골자로 하는 MOU를 추진하여 체결하였고, 2019년 8월 정밀도로지도 공동구축 협의체를 출범하였다. 이에 본 연구에서는 정밀도로지도 관련 국내 외 동향을 분석하고 관련 기업을 대상으로 인터뷰를 수행하였다. 그리고 국내 정밀도로지도 산업에서 민-관이 상생 협력할 수 있는 방안 등을 분석하였고, 향후 정밀도로지도 공동구축 협의체 운영을 위한 단계별 추진전략 및 운영 방안에 대하여 제시하였다.

• 건축역사연구
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• 제15권3호
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• pp.59-79
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• 2006

The architectural characteristics and historical positioning which the historical architecture will be understood better through collecting results from researches which was done on various points of views and positions. Therefore, a study on the layout of the main palace of Goryeo Dynasty also becomes a prerequisite for understanding the architectural characteristics and historical positioning which it possesses. However, the reality is that as the results from the excavation and preceding researches were not integrated together, the understanding of the layout of main palace is remaining on a partial and conceptual level. Therefore, this paper attempted to review in overall the restoration of the layout of the main palace of Goryeo Dynasty using historical documents, precedent researches, excavation maps, topographical map and cadastral maps. Consequently, it was possible to confirm the name of some of the ruins and restore the location and layout of other buildings. The result of this research presented above, will become a basis for understanding the layout of the main palace of Goryeo Dynasty in more realistic and way. Furthermore, it could be used as a fundamental data for related researches.

• 한국공간정보시스템학회 논문지
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• 제6권1호
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• pp.51-58
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• 2004

모바일 매핑시스템은 차량에 GPS(Global Positioning System), IMU(Inertial Measurement Unit), CCD 카메라 등을 탑재하고 위치 및 영상 정보를 취득하는 효율적인 방법이다. 모바일 매핑시스템은 도로 시설물 관리, 지도 갱신 등 다양한 분야에 이용되고 있다. 국외에서 개발된 모바일 매핑시스템은 각 센서의 통합 및 동기화 방안을 알 수 없으므로 업그레이드하거나 새로운 센서를 추가하기 어렵다. 본 연구에서는 모바일 매핑시스템의 개선 및 센서추가를 위해서 모바일 매핑시스템에 기본석으로 필요한 GPS, IMU, 그리고 CCD 카메라와 향후 추가될 센서인 레이저, 오도미터(Odometer) 등의 센서가 추가될 경우를 고려하여 멀티 센서 통합 및 동기화 구현 방안을 제시하였다. 또한 동기화에 필요한 각 센1서의 요구사항을 파악한 후 동기화 장비를 설계 및 제작하고 실험하였다.

• International Journal of Contents
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• 제9권4호
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• pp.22-29
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• 2013

In this paper, we propose a integrated real-time monitoring system for recycling agriculture resourcing based on USN. We design and implement the monitoring system so that we can integrate the quality control of farmyard and liquid manures, barn environment monitoring, and positioning information control into a total management system performing recycling of excrement and manure. Selection of sensors and sensor-node construction and requirements, structure of wire/wireless communication networks, and design of monitoring program are also presented. As a result of operating our system, we can get over various drawbacks of conventional separated system and promote the proper circulation of excrement up to the farmyard. We confirm that these advanced effects arise from the effective management of the total system integrating quality control of farmyard/liquid manure, barn/farmhouse information, and vehicle moving monitoring information etc. Moreover, this monitoring system is able to exchange real-time information throughout communication networks so that we can construct a convenient information environment for agricultural community by converging IT technology with farm and stockbreeding industries. Finally we present some results of processing using our monitoring system. Sensing data and their graphs are processed in real-time, positioning information on the v-world map offers various moving paths of vehicles, and statistical analysis shows all the procedure from excrement occurrence to recycling and resourcing.

• 로봇학회논문지
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• 제9권3호
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• pp.154-159
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• 2014

The Global Positioning System (GPS) is widely used to aid the navigation of aerial vehicles. However, the GPS cannot be used indoors, so alternative navigation methods are needed to be developed for micro aerial vehicles (MAVs) flying in GPS-denied environments. In this paper, a real-time three-dimensional (3-D) indoor navigation system and closed-loop control of a quad-rotor aerial vehicle equipped with an inertial measurement unit (IMU) and a low-cost light detection and ranging (LIDAR) is presented. In order to estimate the pose of the vehicle equipped with the two-dimensional LIDAR, an octree-based grid map and Monte-Carlo Localization (MCL) are adopted. The navigation results using the MCL are then evaluated by making a comparison with a motion capture system. Finally, the results are used for closed-loop control in order to validate its positioning accuracy during procedures for stable hovering and waypoint-following.

• 한국전자거래학회지
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• 제13권4호
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• pp.1-16
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• 2008

위치기반서비스에서 사용자의 위치를 확인하고 추적하는 것이 필수적이다. 특히 옥내에서 위치기반서비스를 제공하기 위해 많은 연구자들은 무선 근거리통신망 환경에서 사용자의 옥내 위치추적에 대해 연구를 수행해 오고 있다. 한편, GPS를 이용하는 옥외에서의 위치추 적에는 칼만필터(Kalman filter)가 이용되기도 하였다. 본 연구에서는 오늘날 널리 보급되어 있는 무선 근거리통신망 환경에서 옥내 위치추적에 적용될 수 있는 확장칼만필터 방법을 제안한다. 기존 연구와 본 제안방법을 비교 실험한 결과, 칼만 필터를 사용함으로써 궤적 측정치의 정확도를 제고할 수 있으며, 나아가서 지도정보를 이용함으로써 정확도를 더욱 제고할 수 있음을 보인다.

• Journal of Construction Engineering and Project Management
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• 제6권2호
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• pp.30-39
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• 2016

This research presents the development of a self-governing mobile robot navigation system for indoor construction applications. This self-governing robot navigation system integrated robot control units, various positioning techniques including a dead-reckoning system, a UWB platform and motion sensors, with a BIM path planner solution. Various algorithms and error correction methods have been tested for all the employed sensors and other components to improve the positioning and navigation capability of the system. The research demonstrated that the path planner utilizing a BIM model as a navigation site map could effectively extract an efficient path for the robot, and could be executed in a real-time application for construction environments. Several navigation strategies with a mobile robot were tested with various combinations of localization sensors including wheel encoders, sonar/infrared/thermal proximity sensors, motion sensors, a digital compass, and UWB. The system successfully demonstrated the ability to plan an efficient path for robot's movement and properly navigate through the planned path to reach the specified destination in a complex indoor construction site. The findings can be adopted to several potential construction or manufacturing applications such as robotic material delivery, inspection, and onsite security.

• 한국측량학회지
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• 제9권1호
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• pp.83-96
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• 1991

본 연구는 최근 소축척 및 중축척지도 제작과 database 구축등의 활용분야에 효용성이 확대되고 있는 SPOT 위성영상의 3차원 위치결정에 대한 연구로서, 사진필름형태의 SPOT 위성영상에 대해 전처리 수준(level 1AP, 1B)에 따른 기하학적 특성과 정확도에 대해 분석하였다. 본 연구 결과, 전처리 수준에 따른 SPOT위성사진의 기하학적 특성과 각 전처리 수준의 외부표정요소에 대한 최적 다항식 형태 및 유의한 부가매개변수를 결정할 수 있었으며, level 1AP가 level 1B에 비해 기하학적 정밀도와 정화도가 양호하여 정밀한 3차원 위치결정과 지도제작에 적합함을 알 수 있었다.

• International Journal of Internet, Broadcasting and Communication
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• 제10권3호
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• pp.136-145
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• 2018

The disaster monitoring technique by combination of the measurement method and the fine precision of the sensor collecting the satellite-based information that can determine the displacement space is available in a variety of diagnostic information and the GIS/GNSS by first sensor it is being requested from them. Be large and that the facility is operated nationally distributed torsional displacement of the terrain and facilities caused by such natural disasters progress of various environmental factors and the surroundings. To diagnose this spatial information, which contains the various sensors and instruments tracks the precise fine displacement of the main construction structures and the first reference in the Geospatial or more three-dimensional detailed available map and location information using the installed or the like bridges and tunnels produced to a USN/IoT change at any time, by combining the various positioning analysis of mm-class for the facility main area observed is required to constantly in the real time information of the USN/IoT environment sensor, and to utilize this as a precise fine positioning information by UAV/Drone to the precise fine displacement of the semi-permanent infrastructures. It managed to be efficient management by use of new technologies, analyzing the results presented to a method capable of real-time monitoring for a large structure or facility to construction disaster prevention.

• Journal of Positioning, Navigation, and Timing
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• 제13권2호
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• pp.159-165
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• 2024

The Global Navigation Satellite System (GNSS) has been used as a tool to accurately extract the Total Electron Content (TEC) in the ionosphere. The multi-GNSS (GPS, GLONASS, BeiDou, Galileo, and QZSS) constellations bring new opportunities for ionospheric research. In this study, we develop a regional ionospheric TEC model using GPS, Galileo, and QZSS measurements. To develop an ionospheric model covering the Asia-Oceania region, we select 13 International GNSS Service (IGS) stations. The ionospheric model applies the spherical harmonic expansion method and has a spatial resolution of 2.5°×2.5° and a temporal resolution of one hour. GPS TEC, Galileo TEC, and QZSS TEC are investigated from January 1 to January 31, 2024. Different TEC values are in good agreement with each other. In addition, we compare the QZSS(J07) TEC and the Center for Orbit Determination in Europe (CODE) Global Ionosphere Map (GIM) TEC. The results show that the QZSS TEC estimated in the study coincides closely with the CODE GIM TEC.