• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.27 no.2
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• pp.281-288
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• 2009

In the paper, we try to develop the methodology for updating road networks of large-scale digital maps by using construction drawing data. For the purpose, it is pre-requite step to merge road networks detached in CAD drawing data. As such, tie points are identified in neighboring drawings and used for solving the parameters of 2D conformal transformation between drawings. Then, the merged road network in CAD data is transformed to the coordinate system of digital maps. In the process, IPs in the drawings are considered as control information and 2D affine transformation is selected for coordinate transformation. Through the experiments with real dataset, we can identify that the developed method is valid and generally applicable.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.20 no.4
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• pp.405-413
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• 2002

It is crucial that we should set proper standards capable of efficiently handling new corrections of maps, connections of edges on the maps, administrative districts, and inter-scale connections in order to make serial cadastral maps. This study drew a two dimensional Parameter using an indent point, as a Review Control Point, on forest screening line or boundary line of administrative district. The study also introduced a few different transformations such as Affine Transformation, N-Degree Polynomial Transformation, and Projective Transformation, the two dimensional transformation methods to apply them to the connection of cadastal·forestry maps and the connection of parcels between the administrative districts, on the forestry map designed by discretionary edges on the maps per district unit with parcel numbers and tried to apply the coordinates transformation method to connections of maps to make serial cadastral maps.

• Journal of Cadastre & Land InformatiX
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• v.53 no.2
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• pp.39-52
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• 2023

Cadastral maps are important official documents that affect property rights and have experienced issues due to over 100 years of usage. The accuracy of these old cadastral maps has decreased due to damage, wear, and the accumulation of errors during the rewriting process. These errors have persisted into the digitalization process, creating difficulties in map management. A nationwide project to revise cadastral and forest maps is underway, but there are technical and legal challenges in making corrections. This study addresses the technical aspects of map maintenance and proposes a method to reduce errors and improve maintenance rates by preceding with boundary adjustments. The results show that by preceding with boundary adjustments, the average distance discrepancy decreases from 22.56cm to 8.12cm, and the maintenance rate increases by more than 10%.

• Journal of Korean Society of Steel Construction
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• v.26 no.2
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• pp.81-89
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• 2014

Investigation results on shear connections design procedure which is conducted in Korea show that there are many communication problems between structural engineer and detailer, and there are unnecessary work procedures. To solve conventional connection design procedure problems, improved shear connection design procedure is suggested. Most of suggested design procedure is controlled by structure engineer, and the introduction of connections standardization makes computer aided design possible. Standardized connection details are satisfied with structural safety and constructability, and it improves design efficiency. Many problems which are caused by conventional design procedure are fundamentally blocked by using suggested design procedure.

• Journal of Korean Society for Geospatial Information Science
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• v.17 no.4
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• pp.105-112
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• 2009

The present serial cadastral maps, which have lots of problems arisen from map matching processes, have very limited applications. That is, the poor quality of serial cadastral maps has kept us from using them. Therefore, a special project for improving the quality of serial cadastral maps was proposed by korean cadastral specialists to solve those problems. The primary purpose of this study is to provide effective ways of serial cadastral map production by reviewing the errors of the present situation-based serial cadastral map production using GIS and digital orthophoto.

• Journal of Welding and Joining
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• v.18 no.5
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• pp.1-2
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• 2000

• Proceedings of the KAIS Fall Conference
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• 2011.12a
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• pp.156-159
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• 2011

본 연구에서는 지적도면 정보에 대하여 불법 복제와 유통의 방지는 물론 유통 후에도 유통 경로를 파악하여 차단할 수 있는 디지털 워터마킹 기술을 개발하여 보고자 하였다. 연구성과로는 지적도면은 일반 지형도와 달리 워터마크의 삽입 및 검출 과정에서 왜곡이 없어야 하고, 또한 토지이동시 발생할 수 있는 다양한 공격에서 강인성을 가져야한다는 특성을 고려하여 주파수 영역에서의 워터마킹 삽입 및 검출 시스템을 개발하였다. 향후 연구에서는 구현된 워터마킹 시스템의 성능을 평가하여 보고자 지적도면의 위치정확도 분석에 기초한 왜곡정도를 분석하고, 다양한 토지이동 상황(분할, 합병, 접합, 이동, 회전 등)에 대한 강인성 및 검출율 등을 실험하고자 한다.

• Journal of Cadastre & Land InformatiX
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• v.54 no.2
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• pp.5-18
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• 2024

To produce seamless cadastral maps through coordinate transformation, a correction that minimizes the boundary difference between neighboring zones or maps is required. In coordinate transformation, a technology that emphasizes specific common points in cadastral surveying was developed, and the usefulness of the perspective projection is presented as a technology to eliminate the coordinate difference between the adjacent four map points that occurs as a result of the coordinate transformation. The correction of the displacement of the vertice points and the map matching entail changes in the boundary line of the parcel, which changes the shape of the parcel and causes changes in the area of the parcel. Therefore, in order to ultimately ensure the consistency of the registered area and the coordinate area, the introduction of a numerical calculation method by the least square method is presented as a working method that can fine-tune the boundary points. The method of utilizing the Affine transformation, perspective projection, and boundary point refinement in conjunction improves the quality of the maps, which has been managed as an individual maps, and enables them to be created as a continuous map over the area.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.5243-5250
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• 2013

BIM(Building Information Modeling) enables 3D model-base management for all information produced by construction project during its life cycle. Also as a national policy, BIM has been institutionalized as design criteria. But, on the matter of 2D drawing using BIM software (Revit Architecture), it has been recognized as difficult to realize the same quality drawing drawn by CAD. The purpose of this study is verifying the possibility of printable design drawing implemented by BIM software at the same quality of 2D shop drawing drawn by 2D CAD. Through the analysis of basic design elements of 3D BIM software and 2D CAD software, with the case of partial cross sectional drawing which is most faithful representation of the basic design elements, this study find out that the 3D BIM software can produce the same quality 2D printable drawing utilizing its implicit function.