• Title/Summary/Keyword: Site surveying

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The Study On The Actual Condition Of Rebar Work In Korean Building Construction (국내 건설 현장의 철근공사 실태조사에 관한 연구)

  • 이응균;박우열;강경인
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2002.11a
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    • pp.133-138
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    • 2002
  • Rebar work takes up big proportion in a construction work. The current process of purchasing, cutting and election, and working of rebar induces a lot of loss in rebar. This study is focused on analyzing the problem and the present condition of the process from the calculating of rebar quantifies to the actual constructional stage through surveying those who have experience in the estimation department, or the construction site of a domestic construction company. Many reform measures such as diversification of standard(i.e., 8-meter)bar, calculation of rebar quantities and construction according to the rebar election drawing, expansion of accuracy in layout plan, thoroughness in examination of layout plan in advance, utilization of the worked material, systemization of rebar control(management), and a shift in attitude of the field(site) manager were proposed as the result of the survey.

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A Study on Detecting of Archaeological sites Using GPR (지하레이더를 이용한 고고학적 유적지 탐사에 관한 연구)

  • 이종출;이영대;이현재;장호식
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2003.04a
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    • pp.513-516
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    • 2003
  • This study was performed in two ways, which are 'Before' 'After' carrying out trench search through GPR which is called 'Non Destructive Geophysical' to the expected area where the remains of historic interest could be distributed within the construction site from Dae-gu to Busan. As a result, the layer containing gravel and sand has more irregular specular surface then others containing silt and clay. And, this paper, irregular specular surfaces of prominence and depression patter appeared. After performing trench search, verified that the site yield dolmens and lots of stone implements.

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Preliminary Estimation of Waste Landfill Sites Using Geo-Spatial Information System and Analytic Hierarchy Process (GSIS와 AHP법을 이용한 쓰레기 매립지 예비 평가 방법)

  • 양인태;김연준;최광식
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.16 no.1
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    • pp.59-66
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    • 1998
  • According to grow interest in environmental quality with improvements of a standard of living site selection problems of environmental hatred facilities, such as waste landfill sites caused regional conflicts. This study investigates a waste landfill estimation method that was used to storage, management, analysis and display of environmental information provided by goo-spatial information system(GSIS) analytic hierarchy process(AHP) as a decision-making method. If GSIS is integrated with AHP, site selection problems of environmental hatred facilities shall be able to very useful, because of AHP with flexibility which appropriately reflect opinions of the related group.

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Establishing PC-based Object-Oriented Urban Infrastructure Information System using GPS and TotalStation (GPS 및 Total Station을 이용한 PC용 개체지향 도시 기반 시설물 관리 시스템 구축)

  • 유상근;이규석
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.18 no.1
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    • pp.41-49
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    • 2000
  • This study was performed to establish PC-based Urban Infrastructure Information System(UIIS) using GPS and TotalStation as an alternative to UNIX-based UIIS. After carryig out this study, the following conclusions were derived: PC-based UIIS costs less time and money than UNIX-based UIIS. The coordinates of the control point of the site were obtained using DGPS, then based on this point, locational data were obtained using RTK GPS and TotalStation in the site with realtime data capture to enhance the accuracy of locational data. And image data were also entered into database together with the text data. So, the multimedia database is possible in UIIS.

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Development and Application of the Parcel-address Based Water Information System (지번을 기초로 한 상수도정보체계 구축 및 활용)

  • 유재용;이규석
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.12 no.1
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    • pp.25-34
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    • 1994
  • Water Information Systems requires efficient management, fast and highly advanced data processing. To respond these requirements promptly, it is essential to operate proper information systems. In the future, the system should be extended to comprehensive urban information systems. To implement these tasks, the user needs assessment were done using the study site data, Nonhyun-dong, Kangnam-ku, Seoul. Based on these analyses, the parcel-address based water information system was developed using the Arc Macro Language(AML) in Arc/Info, a vector-based GIS. The system was tested at the study site, then, the technological and institutional problems to be solved were discussed for the successful water information system.

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A Study on Optimal Site Selection for the Artificial Recharge System Installation Using TOPSIS Algorithm

  • Lee, Jae One;Seo, Minho
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.34 no.2
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    • pp.161-169
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    • 2016
  • This paper is intended to propose a novel approach to select an optimal site for a small-scaled artificial recharge system installation using TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) with geospatial data. TOPSIS is a MCDM (Multi-Criteria Decision Making) method to choose the preferred one of derived alternatives by calculating the relative closeness to an ideal solution. For applying TOPSIS, in the first, the topographic shape representing optimal recovery efficiency is defined based on a hydraulic model experiment, and then an appropriate surface slope is determined for the security of a self-purification capability with DEM (Digital Elevation Model). In the second phase, the candidate areas are extracted from an alluvial map through a morphology operation, because local alluvium with a lengthy and narrow shape could be satisfied with a primary condition for the optimal site. Thirdly, a shape file over all candidate areas was generated and criteria and their values were assigned according to hydrogeologic attributes. Finally, TOPSIS algorithm was applied to a shape file to place the order preference of candidate sites.

Use of GIS for Prioritization and Site Suitability Analysis of Potential Relocation Sites for Military Training Facilities: A Case Study in South Korea

  • Yum, Sang-Guk;Park, Young-Jun
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.40 no.3
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    • pp.195-206
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    • 2022
  • The primary purpose of this study was to analyze assessment factors by identifying and prioritizing live fire shooting area requirements using the AHP (Analytic Hierarchy Process) technique. Derived assessment factors for candidate sites were divided into six categories. Of these, four categories (base-to-range distance, weapon danger area, range terrain, and size) were in the realm of physical geography while the remaining two (land use and proximity to habitation) fell under the general heading of human geography. A case study was also conducted to select several alternative firing ranges using derived factors. The optimal location was analyzed by evaluating the candidate site using each assessment factor. As a result, it was found that assessment factors applying to GIS (Geographic Information System) were able to effectively analyze a suitable location for relocation of the focal training facility, taking into consideration public-safety issues, training requirements, and residents' past and likely future complaints. Through this process, it can prevent the waste of time and effort in determining an optimal location for a live fire shooing range.

A Study on Precision Surveying and Digital Topographic Mapping Using Drones and LiDAR - Focused on the Iksan Wanggung-ri Historic Site - (드론과 라이다를 이용한 정밀 측량 및 수치지형도 제작 연구 - 익산 왕궁리유적을 중심으로 -)

  • Jeon, WooHyun;Kim, Il;Park, JungIl;Oh, Hyundok
    • Journal of Cadastre & Land InformatiX
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    • v.54 no.2
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    • pp.249-261
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    • 2024
  • This study aims to leverage drone technology to perform precise surveying of the Iksan Wanggung-ri archaeological site and produce high-quality digital terrain models (DTM). By integrating drone-mounted sensors, including RGB and LiDAR, the research generated high-resolution orthoimages, digital elevation models (DEM), and three-dimensional models of the site. The results are compared against existing 1:5,000-scale national topographic maps, demonstrating the superior accuracy and detail of the drone-derived data. The drone data enables the creation of 1m interval contour lines, significantly improving terrain analysis over the traditional 5m intervals. Additionally, the integration of point cloud data captured by LiDAR provided a more accurate representation of topographic features. This method preserves the site's integrity while allowing for more frequent monitoring and enhanced site management. These advancements support ongoing academic research and heritage conservation efforts, highlighting the potential of drone technology in archaeological and topographic studies.

Setting Out of Construction Works Using GPS Geoid Height. (GPS 지오이드고를 이용한 측설시공)

  • Kwon, Chan-O;Lee, Young-Jin
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2007.04a
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    • pp.89-92
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    • 2007
  • This investigation aims at calculating the geoid height, distance between the ellipsoidal height and the orthometric height by GPS/Levelling data for nationwide 58 Bench Marks, and calculating the effect of geoid height to engineering public works. The accuracy of the results from baseline analyses and adjustment of a network. using GPS surveying data by nationwide 58 BM show 4mm for horizontal direction and 7cm for vertical direction. The 58 geoid height was calculated by GPS/Levelling. For a construction work field GPS/Levelling for distributed 4 BM in test area can calculate the orthometric height in 20 ppm relativity accuracy with 95% reliability. Besides the calculated geoid height in the investigation was 0.367m higher than EGM96 model. The test results of a engineering work site, the result by EGM96 model was 1.8cm in 10km and it was also 3.6cm in interpolation method. The results show that it is equivalent to levelling of $20mm\sqrt{S}$.

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