• Title/Summary/Keyword: 3D Cadastre

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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
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    • 2004.04a
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    • pp.577-580
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    • 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.

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A Conceptual Data Model of a 3D Cadastre (3차원 지적 개념적 데이터 모델)

  • Park, So-Young;Lee, Ji-Yeong
    • Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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    • 2009.04a
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    • pp.309-310
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    • 2009
  • 건축, 토목기술의 발달과 토지의 효율적 이용 요구 증가로 인해 인간의 생활공간은 지표에서 지상, 지하로 확대되었다. 기존의 2차원 지적 시스템으로는 관리의 한계성이 있기에 이런 현실을 효과적으로 반영할 수 있는 3차원 지적 시스템의 필요성이 제기되었다. 이 연구에서는 3차원 지적 시스템의 구성요소와 개념적 데이터 모델들을 소개하고 현 상황을 반영한 효율적인 개념적 데이터 모델을 제시한다.

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Construction of a Campus Facilities Management System Using Three Dimensional GIS (3차원 GIS에 의한 캠퍼스 시설물 관리시스템 구축)

  • Lee, Jin-Duk;Kim, Ki-Ho;Hur, Chan-Hoe
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2010.04a
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    • pp.367-369
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    • 2010
  • The purpose of this study is to develop a campus facility management system, construct 3D graphic data and attribute data of facilities on the Kumoh National Institute of Technology and then verificate the developed system's practicability. Utilized the existing campus facility data from the existing drawings, images, cadastre records and so forth, 3D position data of underground facilities surveyed with a total station and high-resolution aerial photos, 3D realistic models were produced by means of a XD2D software and a XDWORLD Builder Professional software of GIS engines. We intend to embody not only campus guide service in virtual reality space but visualization of 3D virtual campus by providing 2D and 3D data to web space using XDWORLD server soon after. It is expected that the campus facility management system is able to contribute to the integrated management of 3D facility data service, the support of prompt decision-making related to spatial affairs, the work simplification through data holding in common between the members of the staff and so forth.

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A Study on Decision Making of Cadastral Surveying Results using Drone Photogrammetry (드론항공사진측량을 활용한 지적측량 성과결정에 관한 연구)

  • Lim, Seong-Ha;Kim, Ho-Jong;Lee, Don-Sun
    • Journal of Cadastre & Land InformatiX
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    • v.51 no.1
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    • pp.79-95
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    • 2021
  • This study evaluates the applicability of determining cadastral surveying results using drone photogrammetry during the phase of determining cadastral surveying results, which is the most important stage of cadastral surveying, but known to be hardly objective and highly probable in causing a subjective misjudgment or mistake made by a surveyor. In the experiment to analyze the accuracy of boundary point extraction from drone photogrammetry results, by comparing the coordinate area of 22 parcels extracted from 2D and 3D images with the coordinate area measured from ground survey, the difference could be quantified as RMSE of 1.44m2 for 2D and 0.32m2 for 3D images. In addition, experiments to evaluate the determination of cadastral surveying result based on drone photogrammetry survey showed the RMSE measure of 0.346m towards N direction and 0.296m towards Y direction in comparison to the existing surveying results through data investigation. Based on these experiments, it is judged that cadastral surveying result based on drone photogrammetry can be determined without needing to conduct a location survey with an accuracy of approximately 0.3m in the graphical area, which also leads to possibility of reducing individual errors if drones images are used along with ground survey by objectifying the process of cadastral surveying results.

Indoor 3D Modeling Approach based on Terrestrial LiDAR (지상라이다기반 실내 3차원 모델 구축 방안)

  • Hong, Sungchul;Park, Il-Suk;Heo, Joon;Choi, Hyunsang
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.32 no.5D
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    • pp.527-532
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    • 2012
  • Terrestrial LiDAR emerges as a main mapping technology for indoor 3D cadastre, cultural heritage conservation and, building management in that it provides fast, accurate, and reliable 3D data. In this paper, a new 3D modeling method consisting of segmentation stage and outline extraction stage is proposed to develop indoor 3D model from the terrestrial LiDAR. In the segmentation process, RANSAC and a refinement grid is used to identify points that belong to identical planar planes. In the outline tracing process, a tracing grid and a data conversion method are used to extract outlines of indoor 3D models. However, despite of an improvement of productivity, the proposed approach requires an optimization process to adjust parameters such as a threshold of the RANSAC and sizes of the refinement and outline extraction grids. Furthermore, it is required to model curvilinear and rounded shape of the indoor structures.

3D modeling of Korean Traditional House based on BIM for Uploading to Spatial Information Open Platform (공간정보 오픈플랫폼 탑재를 위한 한옥의 BIM 기반 3차원 모델링 연구)

  • Kim, Kyeong-Min;Kim, Chan-Yong;Choi, Yun-Woong;Cho, Gi-Sung
    • Journal of Cadastre & Land InformatiX
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    • v.44 no.2
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    • pp.91-101
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    • 2014
  • This study tried to create 3D object with LOD3 level for Korean traditional house which is atypical structure, upload to spatial information open platform and confirm the possibility for creating 3D-map. And this study tried to create 3D model for Korean traditional house based on BIM, performed 3D modeling for interior spatial information of Korean traditional house and confirm the development possibility of 3D modeling and visualization method of Korean traditional house. Also this study present the possibility of LOD4 level visualization for spatial information of Korean traditional house which is atypical structure, but 3D object with LOD4 level can't be uploaded to Spatial Information Open Platform currently, cause by data volume limitation of spatial information open platform.

A Study on Position Matching Technique for 3D Building Model using Existing Spatial Data - Focusing on ICP Algorithm Implementation - (기구축 공간데이터를 활용한 3차원 건물모델의 위치정합 기법 연구 - ICP 알고리즘 구현 중심으로 -)

  • Lee, Jaehee;Lee, Insu;Kang, Jihun
    • Journal of Cadastre & Land InformatiX
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    • v.51 no.1
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    • pp.67-77
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    • 2021
  • Spatial data is becoming very important as a medium that connects various data produced in smart cities, digital twins, autonomous driving, smart construction, and other applications. In addition, the rapid construction and update of spatial information is becoming a hot topic to satisfy the diverse needs of consumers in this field. This study developed a software prototype that can match the position of an image-based 3D building model produced without Ground Control Points using existing spatial data. As a result of applying this software to the test area, the 3D building model produced based on the image and the existing spatial data show a high positional matching rate, so that it can be widely used in applications requiring the latest 3D spatial data.

A Study on the Preference by Groups and Quality Improvement Surveying of the Important Factor of 3D Spatial Information by Equipment (장비에 따른 3차원 공간정보 품질향상 요인추출 및 집단 간 선호도에 관한 연구)

  • Oh, Min-Kyun;Bea, Sang-Tea;Kim, Tea-Woo;Lee, Jung-Il
    • Journal of Cadastre & Land InformatiX
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    • v.46 no.1
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    • pp.3-21
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    • 2016
  • This study analyzes the key factors of 3D spatial information in accordance with the establishment of aerial and ground equipment fusion, and the quality improvement solutions are delivered from the preference survey. Furthermore, it investigates the factors affecting the quality of the individual technical elements through the establishment of three-dimensional spatial information. It is for identifying the priority which needs to be improved, and this data will be used to identify the evaluation for factors, the technology development and its application. For this purpose, the presence or absence of equality is judged by the quantitative techniques through the preference survey of the gap between the experts of spatial information and survey and the general users who have experiences on 3D spatial information.

Comparative Accuracy of Terrestrial LiDAR and Unmanned Aerial Vehicles for 3D Modeling of Cultural Properties (문화재 3차원 모델링을 위한 지상 LiDAR와 UAV 정확도 비교 연구)

  • Lee, Ho-Jin;Cho, Gi-Sung
    • Journal of Cadastre & Land InformatiX
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    • v.47 no.1
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    • pp.179-190
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    • 2017
  • A terrestrial LiDAR survey was conducted and unmanned aerial vehicle(UAV) images were taken for target cultural properties to present the utilization measures of terrestrial LiDAR and UAV in three-dimensional modeling of cultural properties for the identification of the status and restoration of cultural properties. Then the accuracy of the point clouds generated through this process was compared, an overlap analysis of the 3D model was conducted, and a convergence model was created. According to the results, the modeling with terrestrial LiDAR is more appropriate for precise survey because 3D modeling for the detection of displacement and deformation of cultural properties requires an accuracy of mm units. And UAV model has limitation as the impossibility of detailed expression of parts with sharp unevenness such as cracks of bricks. However, it is found that the UAV model has a wide range of modeling and has the advantage of modeling of real cultural properties. Finally, the convergence model created in this study using the advantages of the terrestrial LiDAR model and the UAV model could be efficiently utilized for the basic data development of cultural properties.

3D Positioning Using a UAV Equipped with a Stereo Camera (스테레오 카메라를 탑재한 UAV를 이용한 3차원 위치결정)

  • Park, Sung-Geun;Kim, Eui-Myoung
    • Journal of Cadastre & Land InformatiX
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    • v.51 no.2
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    • pp.185-198
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    • 2021
  • Researches using UAVs are being actively conducted in the field of quickly constructing 3D spatial information in small areas. In this study, without using ground control points, a stereo camera was mounted on a UAV to collect images and quickly construct three-dimensional positions through image matching, bundle adjustment, and the determination of a scale factor. Through the experiment, when bundle adjustment was performed using stereo constraints, the root mean square error was 1.475m, and when absolute orientation was performed in consideration of a scale, it was found to be 0.029m. Through this, it was found that when using the data processing method of a UAV equipped with a stereo camera proposed in this study, high-accuracy 3D spatial information can be constructed without using ground control points.