• Title, Summary, Keyword: 측량방식

Search Result 247, Processing Time 0.044 seconds

A Study on the efficient management plan of National control points (효율적인 국가기준점 관리방안에 관한 연구 - TOA 방식을 이용한 기준점 모니터링 -)

  • 이재원;조흥묵;유수엽;이석용
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
    • /
    • /
    • pp.551-555
    • /
    • 2004
  • 본 연구는 건설교통기술혁신 사업의 일환으로 '국가기준점의 관리 및 위치정보서비스 제공을 위한 전자표지석 개발' 과제에 관한 연구내용 및 결과를 중심으로 하고 있으며, 주 내용은 2차 년도 연구에서 수행한 TOA(Time Of Arrive) 방식을 적용한 전자표지석 개발에 관한 것이다. 본 연구의 궁극적인 목적은 국가기준점을 효율적으로 관리하기 위한 새로운 방안을 제시하는 것으로, 기준점의 현황을 실시간 모니터링하고 기준점의 위치파악을 용이하게 할 수 있는 시스템을 연구하는 것이다. 이를 위해 기준점의 현황을 모니터링 가능하도록 기준점의 움직임을 파악할 수 있는 센서를 부착하였고, 편리한 기준점 위치파악을 위하여 TOA(Time Of Arrive) 방식을 적용한 전자표지석의 설계 및 시제품을 제작하였다. 연구결과를 기준점 관리에 활용하기 위한 시제품을 개발하였다.

  • PDF

A Study on Accuracy Evaluation and Accuracy Improvement in Cadastral Re-survey Surveying Method (지적재조사 측량방법의 정확도 비교 및 정확도 향상방안 연구)

  • Lee, Suk Bae;Auh, Su Chang;Suh, Yong Woon
    • Journal of Korean Society for Geospatial Information System
    • /
    • v.22 no.4
    • /
    • pp.39-46
    • /
    • 2014
  • Network RTK GNSS positioning technique which has been developed to overcome the limitation of Single reference station RTK is used widely in the field of general surveying, cadastre surveying and engineering surveying due to the high accuracy and efficiency. It is specified Network RTK, Single reference station RTK and Static of GNSS as a surveying method in the regulation of Cadastre Re-survey Surveying. In this study, Network RTK and Static GNSS surveying were accomplished at cadastral re-survey field in Hadong, Gyeongnam and the surveying results were compared. Also, to analyze the performance of site calibration in Network RTK surveying, two types of Network RTK surveying with and without site calibration were accomplished and the results was compared. The research result shows that average positioning error between Network RTK(VRS) without site calibration and Static surveying result is 2.44cm and 1.53cm respectively and average positioning error between Network RTK(VRS) with site calibration and Static surveying result is 0.19cm and 0.82cm respectively at two zone. So, it was proved the effect of calibration in network RTK(VRS) surveying.

A Study on the Calculation of the Area through the Three Dimensional Terrain Model (3차원 지형모델을 이용한 면적산출에 관한 연구)

  • 강인준;장용구;김상석;김윤수
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.20 no.2
    • /
    • pp.111-118
    • /
    • 2002
  • These days, surveying instruments are developing rapidly and the precision is improving continuously. The building of three dimensional terrains of high precision are possible and the calculation of the areas or the volumes have high precision due to the development of the technique of the spatial information system using computer. But actually, in construction site they calculate two-dimensional area using the traditional method, plate table surveying, planimeter, and then get three-dimensional area through multiplying two-dimensional area by the slope correction factor. In this study, we show the defect and inefficiency of the calculation of area by the traditional methods and survey the area with Electric Distance Measurement and GPS instrument. With this data, we made the three dimensional terrain model and calculated two-dimensional area, three-dimensional area. After that, we compared areas that calculated by algorithm of triangulated irregular network and analysis of grid method with standard area that calculated by the traditional method. Finally, this paper suggested more effective and precious method in calculating three-dimensional area.

A Study on Determining Control Points and Surveying Feature Points for Geo-Referencing of Terrestrial LiDAR Data in Urban Areas (도심지 지상 LiDAR 자료의 Geo-Referencing을 위한 기준점 선정 및 특징점 측량 방안 연구)

  • Park, Hyo-Keun;Han, Soo-Hee;Cho, Hyung-Sig;Kim, Sung-Hoon;Sohn, Hong-Gyoo;Heo, Joon
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.28 no.1
    • /
    • pp.179-186
    • /
    • 2010
  • In this research, an effective method for absolute positioning of feature points is proposed, which is applicable to geo-referencing of terrestrial LiDAR data scanned in dense urban areas. GPS positioning, common in absolute positioning, is apt to fail in the presence of signal disturbancein dense urban circumstances, while traditional surveying methods, including traversing and leveling, are generally more costly for wider areas. The idea is that reference points, marked on top of buildings, are surveyed by GPS positioning and then feature points are relatively positioned from the reference points. The present method, if laser scanning is accompanied, gets two advantages; one is that less feature points need to be surveyed because they can be substituredby reference points, and the other is that laser scanning can be more stably carried out. The present method was shown, from the experiments, to be cost-effective against traditional ones.

A study on the application of RTK-GPS by using CDMA (CDMA를 이용한 RTK-GPS 적용 연구)

  • 배경호;박운용;이기부;이동락
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
    • /
    • /
    • pp.65-69
    • /
    • 2004
  • 기존 라디오파를 이용한 RTCM 방식에서는 전파의 직진성으로 인한 수신 장애가 많이 발생하였다. 이런 문제를 극복하기 위해 라디오 모뎀을 사용하지 않고 휴대폰에 내장된 CDMA 방식을 이용하여 이동전화국 기지국을 통한 오차 보정량을 전송하여 RTK-GPS의 문제점을 해결하고자 하였다. 연구 결과 기존 RTCM 방식과 같은 건물 차폐에 따른 신호 차단의 영향은 없었으며, 제적 작업 시에도 라디오 모뎀의 송수신의 장애로 인한 데이터 손실을 막을 수가 있었다. 마지막으로 10km이상의 거리에서도 작업을 수행하였다. 그 결과 이동전화국 기지국을 이용하였기 때문에 신호의 송수신에는 문제가 없었지만, 공간적 상관성의 문제로 인해 그 값을 쓸 수가 없었다. 따라서, 최근 증가하고 있는 GPS 측량 기법 중에서 현장에서 손쉽게 성과 값을 구하는 실시간 이동측량(RTK GPS Real Time Kinematic GPS)의 문제점을 보완하고 그 효율성을 제고하였다.

  • PDF

Accuracy Evaluation of VRS RTK Surveys Inside the GPS CORS Network Operated by National Geographic Information Institute (국토지리정보원 VRS RTK 기준망 내부 측점 측량 정확도 평가)

  • Kim, Hye-In;Yu, Gi-Sug;Park, Kwan-Dong;Ha, Ji-Hyun
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.26 no.2
    • /
    • pp.139-147
    • /
    • 2008
  • The positioning accuracies tend to deteriorate as the distance between the rover and the reference station increases in the Real-Time Kinematic (RTK) surveys using Global Positioning System (GPS). To solve this problem, the National Geographic Information Institute (NGII) of Korea has installed Virtual Reference System (VRS), which is one of the network-based RTK systems. In this study, we conducted the accuracy tests of the VRS-RTK surveys. We surveyed 50 control points inside the NGII's GPS Continuously Operating Reference Stations (CORS) network using the VRS-RTK system, and compared the results with the published coordinates to verify the positioning accuracies. We also conducted the general RTK surveys at the same control points. The results showed that the positioning accuracy of the VRS-RTK was comparable to that of the general RTK, because the horizontal positioning accuracy was 3.1 cm while that of general RTK was 2.0 cm. Also the vertical positioning accuracy of VRS-RTK was 6.8 cm.

Study on Establishment of Cadastral Surveying Fee System Suitable for Digital Cadastral Management Environment (디지털 지적관리 환경에 적합한 지적측량수수료 체계 확립 연구)

  • Hong, Sung-Eon
    • Journal of Digital Convergence
    • /
    • v.13 no.12
    • /
    • pp.23-30
    • /
    • 2015
  • The current cadastral business is being operated by conversion to a digital cadastral management system through computerized registers (land register and forest land register) and maps (cadastral map and forest cadastral map). Digital surveying methods, such as GPS surveying and electronic plane table surveying, are also used for cadastral surveying. At present, fees for cadastral surveying are calculated based on a standard pursuant to the Construction Standard Production Unit System and an announcement by the Ministry of Land, Infrastructure, and Transportation. In many cases, however, the cadastral surveying fee system announced at present fail to apply the digitalized environment depending on the item. This study sought to analyze the cadastral surveying fee system that requires improvement in the rapidly changing digital cadastral management environment, and to prepare a basis to establish a cadastral surveying fee system suitable to the digital environment by suggesting an improvement method for such system. As a result of the study, the following suggestions were made: a method of changing to terms suitable to the digital environment based on the current status analysis; preparation of a new estimation system regarding new estimation items; and re-survey of an estimation system of cadastral confirmation survey and preparation of an estimation system.

A study on the improvement of transmission line Dip measurement using the motorized total station and GPS coordinate (GPS좌표 및 Motorized 측량기를 활용한 이도측정 방법 개선에 관한 연구)

  • Oh, Jang-Man;Kim, In-Gon;Lee, Bong-Hee;Ko, Young-Chul;Lee, Se-Hun
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.559-561
    • /
    • 2011
  • 송전선로 건설시 적용해 왔던 이도측정 방식에 대하여 정확성이나 효율성면에서 기존의 방식보다 우수한 측량방법을 개발하여 현장에 적용할 필요가 있으며, 그 대안으로 광파기를 활용한 이도측정방법이다. 신공법 적용에 따른 여러 가지 문제점도 발생하고 있어 현장에서 개선방안을 도출하였으며 모터가 부착된 측량기내에 프로그램을 내장하여 누구나 쉽게 현장에서 이도를 측정 할수 있게 되었다.

  • PDF

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
    • /
    • v.15 no.1
    • /
    • pp.16-21
    • /
    • 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.

Accuracy Evaluation of the Height Determined by Network-RTK VRS Positioning (네트워크 RTK VRS 측량에 의한 표고정확도 평가)

  • Lee, Suk Bae
    • Journal of Korean Society for Geospatial Information System
    • /
    • v.21 no.4
    • /
    • pp.55-63
    • /
    • 2013
  • Network-RTK GPS positioning technique based on national CORS(Continuous Operating Reference Station) and wireless internet access as like VRS and FKP was developed to overcome the limitations of traditional RTK technique. In Korea, NGII(National Geographic Information Institute) provides network-RTK service based on 51 CORS and mobile internet network. The purpose of this study is the accuracy evaluation of the height determined by GPS VRS technique based on network-RTK, So, in this study GPS VRS positioning was accomplished through 1st level BM line located at Sancheong~Jinju and $2^{nd}$ level BM line located at Geochang~Sancheong and the average error of the each BM line was calculated as 2.15cm and 1.80cm respectively. This result shows that GPS VRS height positioning can be used in $3^{rd}$ and 4th public BM leveling and also work regulation is needed to apply the GPS VRS height positioning.