• 한국측량학회지
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• 제39권2호
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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.

• Korean Journal of Geomatics
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• 제3권1호
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• pp.73-79
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• 2003

To manage national territory and cadastral data efficiently, accuracy and cost-efficiency in cadastral boundary surveying is inevitable. The efficient management of cadastral data is a very important element in national land management. Survey techniques are being introduced. Recently, improvements in survey techniques have been made with the development of satellite surveying, Allowing accurate and fast surveys. If we can calculate the output accurately in real-time in survey fields, it will open a new method in cadastral detail surveying. According to the classification on Law of cadastral surveying, Cadastral surveying can be divided into cadastral control point surveying and cadastral detail surveying. The control point survey can be divided into cadastral triangulation surveying and cadastral traverse surveying. The detailed survey is usually perform by plane surveying. Among these, cadastral detail surveying will be reviewed in this study. In this study, the combination of the satellites, such as US managed GPS and Russian managed GLONASS was used. In the satellite survey in downtown, data interruption symptoms arose(according to the mask angle of the satellite). Therefore; we combined the satellites to get date more accurately. A block of Haewoondae New City in Busan, Korea, which has Numerical Cadastral Law was selected as the sample area for this study. Block II and III are surrounded by high rise apartments. One side of Block I and IV is level ground and the other side is full of high rise apartments. Especially, Block II is surrounded by high rise apartment houses with 20 meters width. In the results of the study Block II did not satisfy the allowable precision, while Block I, II and IV satisfied the allowable precision of the enforcement regulations of Cadastral Law. Therefore, it is judged that the traditionally used Total Station method should be used for supplementary survey on Block II, in stead.

• 대한공간정보학회지
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• 제12권3호
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• pp.23-31
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• 2004

지적측량은 토지를 지적공부에 등록하거나 등록된 경계를 지표에 복원할 목적으로 각 필지의 경계 또는 좌표와 면적을 정하는 측량으로 크게 기초측량과 세부측량으로 구분되며, 세부측량은 다시 도해지적측량과 수치지적측량으로 나누어진다. 본 연구에서는 전산화사업으로 구축된 필지중심토지정보시스템(PBLIS) 자료에 의한 도해적인 평판측량과 경계점좌표에 의한 수치지적측량을 비교하여 그 정확도를 평가하였다. 그 결과 평판에 의한 도해지적측량 위치오차가 0.766m, 토털스테이션을 이용한 수치지적측량 위치오차는 0.638m로 관측되어 도해지적측량에 의한 성과보다 수치지적측량에 의한 성과가 더 정확한 것으로 분석되었으며, 향후 지적경계측량을 할 경우 PBLIS 사용 가능성을 제시하였다.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2003년도 추계학술발표회 논문집
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• pp.75-80
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• 2003

Most of the control point surveying use a triangulation point and a bench mark with Total Station and Level. nowadays, the research is being accomplished for practical use of GPS. but In this study the optimum time and the optimum occupation time are analyzed, so as to examine possibility of the control point surveying that use GPS continuous station data of National Geography Institute. Also, The efficient surveying methods that compare the result of data that processed using broadcast ephemeris with the result of data that processed using precise ephemeris. As a result of that, Error feature analysis of the control point surveying in connection with GPS continuous observation will provide us estimation of errors and efficient topography information acquisition

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 춘계학술발표회논문집
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• pp.57-57
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• 2004

This study analyzed and compared the results of baseline processing using Epoch-By-Epoch algorithm which is not required initialization compared to conventional kinematic surveying which is required initialization There are rarely differences between 24 hours data of 30 seconds interval and 90 seconds of 30 seconds when it is processed with 26km baseline. This helps with economic surveying using data of GPS CORS

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 추계학술발표회 논문집
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• pp.99-104
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• 2004

Recently, the old surveying method for acquiring surveying-geo information results had a low economic efficiency and a low dependence of precision because it took much times and high costs. So, we acquired law data by execution of control surveying through Static positioning of DGPS(Ashtech). It is computed plainmetric(X, Y) positioning through postprocessing by Prism S/W. And we computed height(Z) through control surveying by ring-closed leveling surveying. After control surveying execution, we built DEM(Digital Elevation Model) using LDT S/W and accuracy 3D detail surveying by EDM(Electronic Distance Measurement) surveying. The purpose of this study was to yield automated digital mapping and the automated amount of materials using ahead data. The conclusions were as follows; First, we built the automated amount of materials system and got high efficiency about personnel, times and precision. Second, when, people precisely positioned on railroads of a high-speed railroad and used GPS surveying, the result was permitted. Finally, it was possible to draw automated profile and cross-section using the 3D terrain model build with the DEM technique.

• 대한공간정보학회지
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• 제15권3호
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• pp.87-96
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• 2007

현재 수치지적 시행 지역에서의 지적측량은 전자측판 측량을 이용하는데, 이는 측량부분에 토탈스테이션과 이로 취득된 좌표정보를 기록 편집을 위한 컴퓨터 시스템으로 구성되어 있다. 본 연구에서는 토탈스테이션을 대체하여 RTK-GPS 측량으로 경계점의 좌표를 취득하고 자료처리와 결선처리 등은 기존의 컴퓨터 시스템을 이용함으로써 수치지적측량의 효율성을 제시하고자 하였다. 연구결과, RTK-GPS측량 성과를 기존 전자측판(토탈스테이션)성과와 비교한 결과 거의 차이가 없었고, 소요시간과 소요인력을 분석한 결과 현행 토탈스테이션을 이용한 전자측판 측량보다 많이 줄일 수 있는 것으로 나타났다. 이외에도 전자측판 시스템을 이용하여 현장에서 자료처리 및 결선작업 등이 이루어질 수 있도록 함으로써 수치지적시행 지역에서 효율적인 측량방법이 될 수 있을 것으로 기대된다.

• 대한공간정보학회지
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• 제21권1호
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• pp.77-86
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• 2013

본 연구에서는 지적측량 자료를 효율적으로 관리 조사하기 위해 지적측량 자료조사 통합관리시스템의 구축 방안을 제시하고자 하였다. 구축된 지적측량 자료조사 통합관리시스템의 효율성을 평가하고자 기존 지적측량 자료조사와 비교 분석한 결과 측량데이터 누락에 따른 측량의 오류를 사전에 제거할 수 있고, 대략 2배 정도의 자료조사 시간을 단축시킬 수 있는 것으로 나타났다.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2007년도 춘계학술발표회 논문집
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• pp.455-458
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• 2007

Currently, aortal surveying is getting advanced in the world. New digital equipment for aerial surveying makes improvement of accuracy, economical efficiency and reduces cost. for a result, however, there are required to produce a accurate product. In this study, we used two kinds of data, the one which used only GPS/INS data and the other one which used GPS/INS data added on GCPs from digital maps, and made as a mosaic to compare both of them whether which one is better based on digital maps. the result is that the data which used GPS/INS data added on GCPs from digital maps was a lot better than GPS/INS data.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2009년도 춘계학술발표회 논문집
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• pp.101-106
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• 2009

Map update is essential for maintaining reliability of maps. Update could be performed using variety of data sources such as aerial photos, engineering plans, LiDAR data and in-site surveying data. Therefore, map update is essential for maintaining reliability of maps. Update could be performed using variety of data sources such ad aerial photos, engineering plans, LiDAR data and in-site surveying data. Map update requires cost, manpower and time. It is important to inform updated information to users in order to decide purchase the updated maps or not. This paper proposes the way to provide various updated information of maps. Therefore, map users efficiently utilize information from maps.