• Title/Summary/Keyword: Softcopy Photogrammetry

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Application of Photogrammetry Method to Measurement of Ground-Surface Displacement on the Slope (사면의 지표변위계측을 위한 사진측량기법의 적용)

  • Han, Jung-Geun;Bae, Sang-Ho;Oh, Da-Young
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.4 no.3
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    • pp.10-18
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    • 2001
  • The existing measurement system to ground-surface displacement survey of the slope has been including the hazard for the measure in site and the difficulty for install, maintenance and control of expensive instruments, which are impossible of whole survey on the slope surface. To overcome of those defects, Softcopy Photogrammertry method is used, which can measure displacement of ground-surface on the slope and structure deformation vectors. Recently, the survey methods applying the advantages of Photogrammetry and Digital Photogrammetry Survey are widely used. In this study, therefore, the development and application of the new instrument mechanism on the the site example are studied. Through the application of Softcopy Photogrammetry, the 3-D data of ground surface on the dangerous slope could be effectively obtained at the long distance, which are obtained through the reform process of contour line. Those are different to the results of the Close-Range Photogrammetry analysis. In ground instrumentation parts, the new practical system shall be the technical base to improve of the instrument machine as well as can be widely applied in civil engineering and others branch.

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Displacement Measuring System for the Slope Stability Analysis Using the Softcopy Photogrammetry (사면안정해석을 위한 사진측량을 이용한 사면변위계측시스템)

  • 한중근;송영석
    • Journal of the Korean Geotechnical Society
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    • v.19 no.4
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    • pp.23-32
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    • 2003
  • The displacement measuring systems of slope ground surface are very expensive instruments and have disadvantages concerning installing, maintaining and surveying. The measuring works are very dangerous. Recently, simple systems are required to measure the displacement of slope ground surface in stages of cutting and maintaining slope. In this study, the mechanism of Softcopy Photogrammetry is applied to measure the displacement of slope ground surface. Three dimensional data of the slope ground surface can effectively be obtained in order to analyze slope stability. Computer Program, DIMA (Design IMmage Analysis), including the reformation process of a contour line was developed. As a result of this study, countermeasure and instruction standards of the displacement of slope ground surface before and after slope failure are established. Also, disadvantages of the existing system can be complemented.

A Study on the Measurement of Slope by Softcopy Photogrammetry (소프트카피 사진측량에 의한 사면지반 측정)

  • 배상호;이형석;주영은
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.19 no.2
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    • pp.183-188
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    • 2001
  • Topographic map is important for the additional detailed construction planning followed by slope sliding. It is a base map that is used to compute the volume of soil, the cost of construction, and check the stability in the area of slope sliding. In this study, 3D topographic data were acquired appling softcopy photogrammetry to the dangerous slope, and the method which can transform these data to the same coordinates system as early TM coordinates was designed. There was a problem when the one meter contour line was made by analysing the image taken from the distance three hundred meters. By solving this problem, this could be used as important data for the planning of road expansion construction. It is expected to be useful for the measurement of various dangerous area in civil engineering works.

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Accuracy Analysis of Medium Format CCD Camera RCD105 (중형카메라 RCD105 정확도 분석)

  • Kim, Tae-Hoon;Won, Jae-Ho;Kim, Chung-Pyeong;So, Jae-Kyeong;Yun, Hee-Cheon
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.28 no.4
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    • pp.449-454
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    • 2010
  • Lately, airborne digital camera and airborne laser scanner in field of airborne surveying are used to build geography information such as digital ortho photo map and DEM(Digital Elevation Model). In this study, 3D position accuracy is compared medium format CCD camera RCD105 with airborne digital camera DMC. For this, test area was decided for aerial photograph. And using 1/1,000 scale digital map, ground control points were selected for aerial triangulation and check points were selected for horizontal/vertical accuracy analysis using softcopy stereoplotter. Accuracy of RCD105 and DMC was estimated by result of aerial triangulation and result of check points measurement of using softcopy stereoplotter. In result of aerial triangulation, RMSE(Root Mean Square Error) X, Y, Z of RCD105 is 2.1, 2.2, 1.3 times larger than DMC. In result of check point measurement using softcopy stereoplotter, horizontal/ vertical RMSE of RCD105 is 2.5, 4.3 times larger than DMC. Even though accuracy of RCD105 is lower than DMC, it is maybe possible to make digital map and ortho photo using RCD105.

The Precision 3D Monitoring to Preserve the Cultural Properties (문화재 보존을 위한 정밀 3차원 모니터링)

  • Nym, Young-Bin;Lee, Kook-Moo;Bae, Sang-Ho
    • Journal of Korean Society for Geospatial Information Science
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    • v.7 no.1 s.13
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    • pp.65-74
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    • 1999
  • The construction of precise digital data and analysis system is very important to fundamental data to preserve and repair cultural properties. This study is about to acquire of digital data and to construct of analysis system for efficient maintenance of cultural properties. On the chinaware with white slip and greyish-green glaze acquiring 3D digital data and carrying the spatial analysis and monitoring were done through the softcopy photogrammetry method. So, we intend to offer the efficient method to preserve cultural properties.

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