• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.169-169
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• 2016

농업 유역 내 수문 순환 및 비점오염원의 발생 및 거동에 대해서 유역단위로서의 많은 연구가 진행되어 왔다. 하지만 유역단위로서의 모의를 통해서는 필지 별 발생되는 농업 비점오염물질을 평가하고 대책을 세우기에는 한계가 있다. 따라서 농업 유역의 농경지를 대상으로 유역단위 모의가 아닌 필지단위 모의를 진행함으로써 농업 비점오염물질에 대한 관리를 해야 할 필요성이 있다. 그리하여 본 연구에서는 필지단위로 상세한 모의가 가능한 ArcAPEX 모형을 사용하였으며 모형 내 임계값 조정을 통한 유역 구분 시 우리나라 지형 및 농업특성 상 지형인자 추출의 어려움으로 Pre-defined Streams and Watersheds 기능을 활용하는 것이 농경지를 대상으로 정확한 필지 분할 및 필지 특성 반영이 될 것이라 판단하였다. 하지만 Pre-defined Streams and Watersheds 기능에 필요한 자료를 구축하는데 시간과 노력이 많이 소모되고 어려움이 있었다. 따라서 본 연구에서는 입력 자료 구축의 편의를 도모하고자 Subarea-Stream 자동 연결 모듈을 개발하여 그 활용성을 평가하고자 하였다. 이를 위해 지형적 특성으로 인해 집약적인 농업이 행해지고 있는 강원도 양구군에 위치한 해안면 유역의 농경지 경계와 하천 및 수로에 대한 자료를 Subarea-Stream 자동 연결 모듈에 입력하여 최종적으로 Pre-defined Streams and Watersheds 기능에 필요한 입력 자료를 변환시켜 모형에 적용하였다. 본 연구결과 Pre-defined Streams and Watersheds 기능에 필요한 입력 자료를 단시간에 편리하게 구축할 수 있었으며, 농경지를 대상으로 필지 단위로 분할이 된 것을 확인 할 수 있었다. 최종적으로 본 연구를 통해 지형인자 추출 오류로 인해 수계 추출 시 나타날 수 있는 문제점에 대한 해결을 할 수 있었으며 모형 내 Pre-defined Streams and Watersheds 입력 자료 구축 시 Subarea-Stream 자동 연결 모듈을 활용한다면 농업 유역 내 농경지에 대해서 편리하게 유역단위에서의 모의가 아닌 필지단위에서의 상세한 모의를 하는데 큰 기여를 할 것이라 판단된다.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2010.06a
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• pp.9-18
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• 2010

This study investigated the cadastral non-coincidence between real land using and cadastral book using Google Earth Web for difficult area to access that is more efficient method compared with field survey for saving time and money. An reading error has occurred eight parcels about dry field and paddy field but this method is more powerful in case of a danger area of steep, unregistered cemeteries of cadastral book using Google Earth Web of image interpretation that method takes 1 day, the accuracy is 96% and improved 20% more than field survey takes 5 days by 40 parcels. It's possible to reduce the manpower, time and budget could be minimized. In particular, it is need to land alteration of forests and fields category that finds 47 locations a burial ground of non register cadastre book. Google Earth Web method is enabling easy visual analysis of the future land administration of local governments to improving the reliability of temporal and economic costs can be very useful to reduce.

• Journal of architectural history
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• v.22 no.3
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• pp.27-36
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• 2013

The purpose of this study is to analyze the process of lots-subdivision within the block of Gaeksa at Dongnae-bu under the rule of Japanese Imperialism. Gaeksa of the old government office was the sanctuary that symbolized the sovereignty. Therefore it was naturally a main object of demolition and then the site was converted to other purpose. And Gaeksa was not only converted into the elementary school and the public market but the historic site also processed to break down for opening the road through Japanese Occupation of Korea. The main reasons of lots-subdivision were the transfer from state property to private ownership and the urban development project. Needless to say, the particular major reason was derived from the intention of Japanese Imperialism to destroy the traditional urban. As a result, Gaeksa can not be recognized the traces of today and contributes to the demolition of the remaining ancient building. Finally the deformed urban structure was left over from destroyed building.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.32 no.2
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• pp.87-93
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• 2014

Cadastral parcel objects as polygons are fundamental dataset which represent land administration and management of the real world. Thus it is necessary to assure topological seamlessness of cadastral datasets which means no overlaps or gaps between adjacent parcels. However, the problem of overlaps or gaps are frequently found due to non-coinciding edges between adjacent parcels. These erroneous edges are called uncertain edges, and polygons containing at least one uncertain edge are called uncertain polygons. In this paper, we proposed a new algorithm to efficiently search parcels of uncertain polygons between two adjacent cadastral datasets. The algorithm first selects points and polylines around adjacent datasets. Then the Constrained Delaunay Triangulation (CDT) is applied to extract triangles. These triangles are tagged by the number of the original cadastral datasets which intersected with the triangles. If the tagging value is zero, the area of triangles mean gaps, meanwhile, the value is two, the area means overlaps. Merging these triangles with the same tagging values according to adjacency analysis, uncertain edges and uncertain polygons could be found. We have performed experimental application of this automated derivation of partitioned boundary from a real land-cadastral dataset.

• Spatial Information Research
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• v.11 no.4
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• pp.421-437
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• 2003

In order to calculate the position of parcel boundary points, the area of the Parcel, and the length of the parcel boundary lines using a digitalized cadastral map or maps, the distortion of the map has to be corrected. The correction methods, such as the method of 2D affine transformation using 4 comer points of the edge lines, the method of tessellation into 9 subregions, the method of using the original surveying sheets, and the method of straightening the 4 edge lines, have been developed. In this Paper, the four methods were programed and applied to some sample cadastral maps and the correction accuracies were obtained and analysed. No method could prefectly correct the distortions because the distortions were irregular throughout the maps. However, it is found that tile method of straightening the 4 edge lines is the one which can minimize the distortions when the method is applied after applying the 2D projective transformation on the maps using the 4 comer points of the edges.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.32 no.spc4_2
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• pp.375-386
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• 2014

This research inquired problems that appeared in the previous boundary point coordinates record book, boundary point cover record book, and ground boundary point record book. Also, we suggested the framing plan and based on the boundary point record book for the registration and management of boundary point of cadastral resurvey upon completion on record book. In fact, the outlines of result could be organized into three following points; Firstly, a quick survey can be possible, as reference points for the present situation were available to be checked right away due to unify and manage the boundary point at the record book, even if at the field without the location explanation drawings of boundary points. Secondly, continuous managing of boundary points is possible, since recording the boundary points book with a parcel boundary point, as a unit, make it easily monitoring the formation, critical situation, and extinction of boundary point. Thirdly, the boundary point could be maintained at the boundary points at location, coinciding with geographic features by requesting boundary changes at the time of completion, although it has been made at when the location explanation drawing is made.

• Journal of Cadastre & Land InformatiX
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• v.52 no.1
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• pp.5-16
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• 2022

Based on the general formula for the area error of a polygon and rectangular parcel, the constant term 0.026² × M (scale denominator) of the area error calculation formula prescribed by the Enforcement Decree was analyzed. As a result, it is found that the formula appropriately reflects the characteristics of the graphical surveying as a typical rectangular parcel model, but quantitatively allows a relatively large area error. In addition, it is found that, even if the area is the same, 50% more area error than a square parcel could be calculated depending on the shape of the parcel, and that the allowable area error should be different when dividing a parcel. Based on the analysis, furthermore, this study shows a solution that can solve the problems at once from the point of cadastral surveying. These are, the problem of reflecting the accuracy of the surveying, the problem of reflecting the size and shape of the parcel, and the problem whether a single area error formula can be used without having to distinguish between graphical and numerical surveyings. The new formula that solves these problems will bring about improvements in many related factors and promote the development of digital cadastral system.

• Journal of architectural history
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• v.31 no.1
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• pp.61-76
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• 2022

Bongik-dong, Kwonnong-dong, Ikseon-dong and Nakwon-dong are areas around Donhwamun-ro in Seoul. These residential areas began to be developed collectively from the 1920s and the construction period was the fastest among hanok residences collectively formed in urban center. At that time, houses were developed with high density. In the 1920s, many medium-sized plots of less than 3,300m² were distributed around Donhwamun-ro. Private developers such as Jeong Se-kwon(Konyangsa), Shin Tae-jong, and Yoon Heung-rim, who were active at the time, purchased medium-sized plots. Developers sold out the land directly or after constructing Hanok on the divided plot and then selling them. This method of developing hanok residences by private developers in the 1920s have influenced on hanok residences which began to be developed after the 1930s. Currently, many urban Hanoks still remain in areas around Donhwamun-ro. The initial aspects of the hanok development in the 1920s could be grasped through blocks, plot division, alleys, row house Hanok etc around Donhwamun-ro.

• Journal of the Korean Institute of Rural Architecture
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• v.5 no.2
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• pp.10-19
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• 2003

The purpose of this study was to analyze the formation and change of road-block-lot of the old inner city in cheongju The result of this study are as follows; (I)Among others a system roads of in around the old castle in cheongju city is most of feature north and south direction of road. Lot system is organic relations of north and south direction of road. Therefore, urban tissue in around the old castle in cheongju city is established order road system keep on the change of expansion urban tissue. (2) Block type classified into non-division, 2division and over 3division. (3) The square block remains mostly in Cheongju old castle, two-division block was around south of castle. And block of the grid-form street system divided into over 3 division. Through the guideline about characteristic of block type, residential area should be developed as a characteristics area in the urban area.

• Ecology and Resilient Infrastructure
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• v.8 no.4
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• pp.253-265
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• 2021

In this study, crop cultivation filed was extracted by using Unmanned Aerial Vehicle (UAV) imagery and deep learning models to overcome the limitations of satellite imagery and to contribute to the technological development of understanding the status of crop cultivation field. The study area was set around Chungbuk Goesan-gun Gammul-myeon Yidam-li and orthogonal images of the area were acquired by using UAV images. In addition, study data for deep learning models was collected by using Farm Map that modified by fieldwork. The Attention U-Net was used as a deep learning model to extract feature of UAV in this study. After the model learning process, the performance evaluation of the model for corn cultivation extraction was performed using non-learning data. We present the model's performance using precision, recall, and F1-score; the metrics show 0.94, 0.96, and 0.92, respectively. This study proved that the method is an effective methodology of extracting corn cultivation field, also presented the potential applicability for other crops.