• Title/Summary/Keyword: 3D Surveying

Search Result 588, Processing Time 0.022 seconds

Generation of 3D Design Data using Laser Scanning Data

  • Park, Joon Kyu;Lee, Keun Wang
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.39 no.5
    • /
    • pp.343-349
    • /
    • 2021
  • In The process from design to construction in the existing construction work was less efficient due to the contradictory approach of identifying the 3D state in the plan view and the repeated generation of surveys, floor plans, drawings. Accurate 3D design data is essential for smart construction. However, most of the existing related studies have focused on explaining the development method and main functions of equipment or improving the productivity of smart construction. Therefore, in this study, the utility of 3D design model generation for smart construction and construction survey using 3D laser scanner was evaluated. Plane and vertical road alignment were created using the specifications of the road. The generated road alignment was created as a three-dimensional corridor design using cross-sections at intervals of 20m. In addition, it was possible to create a DTM (Digital Terrain Model) using a digital map and effectively create a 3D design model for the study area through overlapping. Construction survey using a 3D laser scanner showed accuracy within 10cm as a result of the accuracy evaluation. These results proved that construction surveying using a 3D laser scanner is possible because it satisfies the acceptable accuracy of the relevant regulations modeling of target areas using 3D design and construction survey using 3D laser scanner can be a way to address shortcomings of existing GNSS (Global Navigation Satellite System) methods. And accurate 3D data will be used as essential data as basic data for smart construction.

Open Standard Based 3D Urban Visualization and Video Fusion

  • Enkhbaatar, Lkhagva;Kim, Seong-Sam;Sohn, Hong-Gyoo
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.28 no.4
    • /
    • pp.403-411
    • /
    • 2010
  • This research demonstrates a 3D virtual visualization of urban environment and video fusion for effective damage prevention and surveillance system using open standard. We present the visualization and interaction simulation method to increase the situational awareness and optimize the realization of environmental monitoring through the CCTV video and 3D virtual environment. New camera prototype was designed based on the camera frustum view model to project recorded video prospectively onto the virtual 3D environment. The demonstration was developed by the X3D, which is royalty-free open standard and run-time architecture, and it offers abilities to represent, control and share 3D spatial information via the internet browsers.

A Study on the Development of the Guidelines for Supervision and Inspection of Earthworks Quantity Using 3D Scanning Technology (3D 스캐닝 기술을 이용한 토공사 기성관리 감독 및 검사 가이드라인 개발)

  • Lee, Young-ho;Yun, Won Gun;Park, Jae-woo
    • Journal of the Korean Society of Industry Convergence
    • /
    • v.23 no.5
    • /
    • pp.735-746
    • /
    • 2020
  • Recently, in Korea, various technology developments have been made to utilize 3D space and facility data such as unmanned aerial vehicles (UAV) and laser scanners with the goal of improving productivity at construction sites. However, the lack of related regulations for 3D laser scanner surveying has been a barrier to using the technology across the surveying industry. As a result, owners, contractors, and construction supervisors are reluctant to introduce and apply technology to the site. In this study, the guidelines (drafting and inspection work to be supervised by construction supervisors when constructing earthworks using laser scanners) was developed and presented so that the earth surveying and quantity calculation technology using a laser scanner could be applied and diffused in a construction site. Through the development of this guideline (proposal), it is judged that the supervision and inspection of earthworks quantity using a laser scanner will be activated in the field.

3D Generalization and Logical Error Correction for Digital Map Update (수치지도 갱신을 위한 3차원 일반화와 논리적 오류수정)

  • Lee, Jin-Hyung;Lee, Dong-Cheon;Park, Ki-Suk;Park, Chung
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
    • /
    • 2009.04a
    • /
    • pp.29-34
    • /
    • 2009
  • Map update is required to provide up-to-date information. In update process, the most adequate generalization is to be applied to all scales of maps simultaneously. Most of existing maps are composed of 2D data and represented in 2D space. However, maps for next generation are to be generated with 3D spatial information including ortho-images and DEMs. Therefore, 3D generalization is necessary for 3D digital map update. This paper proposes methods for 3D generalization and correction for logical errors possibly accompanied with generalization.

  • PDF

Construction of 3D Spatial Information about Cave by Terrestrial LiDAR (지상라이다에 의한 동굴의 3차원 공간정보 구축)

  • Kang, Joon-Mook;Lee, Jong-Sin;Won, Jae-Ho;Park, Joon Kyu
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.28 no.2
    • /
    • pp.207-215
    • /
    • 2010
  • There are two methods to survey the natural cave. One is plane table surveying and the other is recording chart surveying. The drawing maps drawn by these methods are 2D. Furthermore, it is difficult to figure out the accurate dimension about full sections and whole interior products because of use of plane table and recording chart. Accordingly, in this study, the 3D spatial information about Dangcheomuldonggul was constructed by the Terrestrial LiDAR and high resolution digital camera where is belong to Jeju Volcanic Island and Lava Tubes as the first World Natural Heritage of the Republic of Korea. Also, the utilization possibility of 3D spatial information was suggested to the basic data of deformation and change detection through structure analysis, section analysis, shape analysis, and interior products analysis.

Enhancement of Continuity and Accuracy by GPS/GLONASS Combination, and Software Development

  • Kang, Joon-Mook;Lee, Young-Wook;Park, Joung-Hyun
    • Korean Journal of Geomatics
    • /
    • v.2 no.1
    • /
    • pp.65-73
    • /
    • 2002
  • GPS in the United States and GLONASS of the old Soviet Union are used currently as satellite navigation systems. Plans are being made to use the Galileo satellite system in Europe, and these plans focus on a combined application of the satellite navigation systems. In this study, we examined the possibility of effective application of a combination of GPS/GLONASS in urban areas, where 3-dimensional positioning is impossible with GPS alone. We analyzed the 3-D coordinate deviation of a GLONASS satellite by integration interval and compared it with GLONASS satellite coordinates in precise ephmerides by transforming it into WGS84. We also programmed GPS/GLONASS, analyzed 3-D positioning accuracy by static surveying and kinematic surveying with Ashtech Z18 receivers and Legacy receivers, and then compared the results to those of GPS surveying. As a result, we are able to decide the integration interval for producing GLONASS satellite coordinates in navigation and geographical information and construct a GPS/GLONASS data processing system by developing a DGPS/DGLONASS positioning program. If more than four GLONASS satellites are observed, the accuracy of GPS/GLONASS is better than that of GPS positioning. As a result of kinematic surveying in a congested urban area with skyscrapers, we discovered that the GPS/LONASS combination is very effective.

  • PDF

Next Generation Non-Glasses 3D Stereoscopic Monitors and Spatial Information (차세대 무안경 3D 입체 모니터와 공간정보)

  • Lee, Seun-Geun;Jeon, Young-Jae;Lee, Dong-Cheon
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
    • /
    • 2010.04a
    • /
    • pp.81-85
    • /
    • 2010
  • Recently, 3D stereo movies, 3D TV broadcasting, and stereoscopic monitors become hot issue. Worldwide engagement in an intense competition for stereo viewing technology just begins. Photogrammetry is the originator of dealing obtaining stereo imagery, processing and display. Non-glasses stereo monitors will replace existing monitors in near future. This study introduces real 3D stereo viewing methods of geospatial data on the non-glasses stereoscopic monitors.

  • PDF

A Conceptual Data Model for a 3D Cadastre in Korea

  • Lee, Ji-Yeong;Koh, June-Hwan
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.25 no.6_1
    • /
    • pp.565-574
    • /
    • 2007
  • Because of most current cadastral systems maintain 2D geometric descriptions of parcels linked to administrative records, the system may not reflect current tendency to use space above and under the surface. The land has been used in multi-levels, e.g. constructions of multi-used complex buildings, subways and infrastructure above/under the ground. This cadastre situation of multilevel use of lands cannot be defined as cadastre objects (2D parcel-based) in the cadastre systems. This trend has requested a new system in which right to land is clearly and indisputably recorded because a right of ownership on a parcel relates to a space in 3D, not any more relates to 2D surface area. Therefore, this article proposes a 3D spatial data model to represent geometrical and topological data of 3D (property) situation on multilevel uses of lands in 3D cadastre systems, and a conceptual 3D cadastral model in Korea to design a conceptual schema for a 3D cadastre. Lastly, this paper presents the results of an experimental implementation of the 3D Cadastre to perform topological analyses based on 3D Network Data Model to identify spatial neighbors.

A Study on the Accuracy Analysis of Position Measurement Target for Underground Facilities by Retro-reflection (재귀반사체를 이용한 지하시설물 위치측정 타깃의 정확도 분석에 관한 연구)

  • Min, Kwan Sik;Kim, Jae Myeong;Choi, Yun Soo
    • Spatial Information Research
    • /
    • v.21 no.1
    • /
    • pp.45-52
    • /
    • 2013
  • Recently 3D surveying is recommended to manage underground facilities systematically before refilling of site operation. As the demand of realtime localization increases, cost reduction and consistent data construction which are realizable by using one man surveying method with unmanned target, are necessary for constructing DB of all sorts of the underground facilities with more speediness and correctness. This study sets a goal to develop a new type of surveying target which allows realtime localization to be performed by one man, through making an optimum reflector(triangle, quadrangle, and semispherical shape) by using the retro-reflection principle of optical prism which is being used for surveying currently. The new surveying target makes realtime surveying possible. To check reliability of its data, the accuracy is compared with surveying coordination of total station for each type in a quantitative method. In the result, the usefulness of the reflector for Underground Facilities localization is proved. Thus the foundation for underground DB construction conducted by one man is established for acquisition of 3D location information in more efficient way through using unmanned target.

Construction of 3D Information Cadastral Map Model Using GIS (GIS를 이용한 3차원정보지적도 모형 구축에 관한 연구)

  • 오이균;양인태;유영걸;천기선
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
    • /
    • 2004.04a
    • /
    • pp.577-580
    • /
    • 2004
  • Recently, in a field of cadastre, a computerization of cadastral map is in progress with great growth of GIS field. Also, the needs for the integration of land and building information are widely increasing for integral-management and its application of various land related information. In this study, it is constructed a 3D information cadastral map model that can make the integral management of land, building, connecting land recorders, building management ledgers, building titles, building pictures, and related attribute information.

  • PDF