• Title/Summary/Keyword: Surveying system

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Accuracy Evaluation of Cadastral Surveying using Data of Parcel Based Land Information System (필지중심토지정보시스템 자료를 이용한 지적측량 정확도 평가)

  • Ju, Jeong-Jun;Kim, Seong-Sam;Yoo, Hwan-Hee
    • Journal of Korean Society for Geospatial Information Science
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    • v.12 no.3 s.30
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    • pp.23-31
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    • 2004
  • Cadastral surveying is related to demarcating legal boundaries and areas for the sake of registering a properly on cadastral records or restoring registered boundaries on the ground. It is composed of control surveying (cadastral triangulation and supplementary control surveying) and detail surveying. Detail surveying is classified into plane table surveying by graphical cadastral map and numerical surveying by boundary point coordinates. In this study we compared the accuracy of plane table surveying with numerical surveying using Parcel Based Land Information System(PBLIS) data constructed by the cadastral map digitalization business. In conclusion the result by numerical surveying was analyzed as more accurate than the result of plane table surveying, as Root Mean Square Errors(RMSE) of graphical cadastral surveying is 0.766m and that of numerical cadastral surveying using Total Station(T/S) is 0.683m. Therefore, PBLIS data is expected to be used for surveying legal boundaries and areas in the near future.

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Comparing Efficiency of Numerical Cadastral Surveying Using Total Station and RTK-GPS (토탈스테이션과 RTK-GPS 측량을 이용한 수치지적측량의 작업효율성 비교)

  • Hong, Sung-Eon
    • Journal of Korean Society for Geospatial Information Science
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    • v.15 no.3
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    • pp.87-96
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    • 2007
  • In the numerical cadastral surveying field, the cadastral surveying would be measured with the Total Station surveying (electronic plane table surveying) system that consist the Total Station for surveying and the computing system for recording and editing the measured coordinates data by the TS. This study would suggest the advanced method, which is used on the RTK-GPS instead of TS for surveying and the computing system for handling the coordinates data and mapping. As a result of this study, although the measurement accuracy of the RTK-GPS and TS surveying make no greate difference, the suggested method reduces the cost of time and work force with the TS surveying. Besides, the new survey method would be more efficient due to directly handling the data and mapping in the field.

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Accuracy Analysis of Road Surveying and Construction Inspection of Underpass Section using Mobile Mapping System

  • Park, Joon Kyu;Um, Dae Yong
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.39 no.2
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    • pp.103-111
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    • 2021
  • MMS (Mobile Mapping System) is being used for HD (High Definition) map construction because it enables fast and accurate data construction, and it is receiving a lot of attention. However, research on the use of MMS in the construction field is insufficient. In this study, road surveying and inspection of construction structures were performed using MMS. Through data acquisition and processing using MMS, point cloud data for the study site was created, and the accuracy was evaluated by comparing with traditional surveying methods. The accuracy analysis results showed a maximum of 0.096m, 0.091m, and 0.093m in the X, Y, and H directions, respectively. Each RMSE was 0.012m, 0.015m, and 0.006m. These result satisfy the accuracy of topographic surveying in the general survey work regulation, indicating that construction surveying using MMS is possible. In addition, a 3D model was created using the design data for the underpass road, and the inspection was performed by comparing it with the MMS data. Through inspection results, deviations in construction can be visually confirmed for the entire underground roadway. The traditional method takes 6 hours for the 4.5km section of the target area, but MMS can significantly shorten the data acquisition time to 0.5 hours. Accurate 3D data is essential data as basic data for future smart construction. With MMS, you can increase the efficiency of construction sites with fast data collection and accuracy.

Design of the Realtime GNSS Surveying Software for Advancement of Geospatial Information Construction Technology

  • Park, Joon Kyu;Jung, Kap Yong
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.34 no.4
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    • pp.425-430
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    • 2016
  • Currently, start of the operation US GPS, the Russian Glonass, European Galileo, the Chinese Compass satellites for positioning are celebrating a true GNSS (Global Navigation Satellite System) generation. Korea is building advanced infrastructure such as a national network consisting of CORS (Continuously Operating Reference Station), VRS service for real-time precise positioning and perform continuous upgrading. However, the acquisition of geospatial information using the national infrastructure requires many steps and high dependence on foreign software part in this process. This study contributes to advanced construction technology of geospatial information by design of realtime GNSS surveying system. As a results, it has designed the surveying software that can effectively positioning realtime. Designed realtime surveying software can utilized in various fields.

A Study on the Algorithms of Terrestrial Photogrammetry using Vehicle (차량을 이용한 지상사진측량의 알고리즘에 관한 연구)

  • 정동훈;엄우학;김병국
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2003.04a
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    • pp.145-150
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    • 2003
  • Mobile mapping system is a surveying system that use vehicle carrying various sensors as CCD camera, GPS and IMU(Inertial measurement Unit). This system capturing images of forward direction continuously while running road. Use these images, then acquire road and road facilities information as facilities position, size or maintenance condition. In this study, we organized data and each data processing steps that are needed for 3 dimensional positioning. And develop digital photogrammetry S/W easy to use and accurate for mobile mapping system.

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Design and Running of a Surveying Ship for Bathymetry of The Manned and Unmanned Control System (유.무인운용 가능한 수심측량을 위한 측량선 설계 및 구현)

  • Choi, Hyun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.1
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    • pp.16-21
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    • 2011
  • Bathymetry which is mainly used on the earth or the sea can be surveyed directly by a person who is on a surveying ship or in a way one estimates the target through a surveying ship. However, the surveying ship which is being used now is divided into a manned and unmanned system and it's difficult to deal with it appropriately according to the water depth or the condition of weather. Therefore, this study will invent the surveying ship that can measure the water depth with the unmanned remote control system in the place where it's difficult to for man access because of a bad weather or a vast area. There are two methods in the control system of the manned and unmanned surveying ship which has been developed in this study. One is an automatic control which moves on the path set by the user in advance and the other is the optimized passive control in which the control station can manage the direction and speed of a surveying ship directly.

Improvement of Positioning Accuracy in Realtime VRS Surveying (VRS 측량에 의한 실시간 위치 정확도 향상 방안)

  • 이준석;강인준;곽재하;강문수
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2003.04a
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    • pp.123-126
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    • 2003
  • In this study we investigate japan VRS system comparing VRS and RTK. and real time VRS surveying and RTK-GPS surveying field test. The pilot VRS surveying project have been done to verify a new technology accuracy and efficiency and we also derived future research and work in korea from that studying.

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Ellipsoidal Agreement Analysis between Bessel 1841 and GRS80 in Korea by Astrogeodtic Geoid (천문측지지오이드에 의한 Bessel1841과 GRS80의 우리나라에의 타원체 적합성 분석)

  • Lee, Suk-Bae;Sim, Jung-Min
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2007.04a
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    • pp.17-20
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    • 2007
  • Many countries have changed her geodetic reference system from local system to global system because of the global network's necessity And, also Korean geodetic reference system changed from Tokyo datum to Global geodetic reference system since 2003 as the revision of Survey Law and Korean reference ellipsoid changed from Bessel 1841 ellipsoid to GRS80. Astronomic surveying has been regarded as an important method for absolute positioning of geodetic datum in each countries under the local geodetic reference system. This paper aims to analyses distribution of geoidal heights and ellipsoidal agreement between Bessel 1841 and GRS80 ellipsoid in Korea through comparing both astrogeotic geoidal heights referred to GRS80 and Bessel 1841 ellipsoid by astronomic surveying data which have been surveyed after 1970 in Korea.

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Surveying a 765kV Transmission Line Using GPS (GPS를 이용한 가공송전선로 측량)

  • Jung, Tay-Ho;Kim, Chang-Ho;Yoon, Young-Soon;Lee, An-Keun;Kim, Jung-Ho;Shin, Tae-Woo
    • Proceedings of the KIEE Conference
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    • 1999.07c
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    • pp.1091-1093
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    • 1999
  • This paper discusses the surveying of a power transmission line using Real Time Kinematic(RTK) GPS technology. The use of RTK provides users with an accurate position at the moment in time. Application result of a 765kV transmission line surveying proved to be more accurate and efficient than using a traditional EDM (Electro-magnetic distance measurement) method. More, decrease in numbers of trees cut down which is a major cause of public discontents was achieved. Improvements in doing a surveying of a power transmission line using GPS is expected in the future.

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