• 토지주택연구
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• 제3권2호
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• pp.111-116
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• 2012

The primary purposes of this study are to identify the characteristics of land development in urban area through GIS and remote sensing techniques and to provide useful implications for urban spatial policy. To perform these tasks, Daegu metropolitan city and its vicinities were selected as a study area, and remote sensing data and attributed data were collected, organized and analyzed. This study focuses on the following three steps. First, it identifies the characteristics of land development in urban areas by utilizing multi-temporal satellite image data (Landsat TM, 1980, 1985, 1990, 1995, 2000 and 2005). Second, it tries to find an answer on a critical question concerning land use conversion, i.e., which land use leads expansion of urban area? Third, it derives implications for urban spatial policies based on these findings. The characteristics of the urban extents tell us that the main land use converted into urban use from non-urban uses is green areas. The public sector, central and local governments, leads the land use conversions of suburban lands as exclusive legal body to issue permission of land use change. Based on these findings, this study concludes that the more systematic and technically advanced management tools should be utilized for more effective spatial management for urban growth.

• 한국지리정보학회지
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• 제7권3호
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• pp.1-12
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• 2004

위성영상은 도시의 물리적 확산 및 변화를 예측하는데 많이 활용되고 있다. 그러나 이 방법은 도시화된 지역이 어느 정도의 강도로 개발되었는지를 파악할 수 있는 밀도분석에는 적절치 못하다. 이는 위성영상이 미시적 공간단위로 토지이용 현황을 분석하는 반면 통계자료는 거시적 공간 단위로 구축되어 있어 통계자료를 미시적인 공간단위에 적용하는데 어려웠기 때문이다. 본 연구는 위성영상자료와 통계청의 기초단위구라는 미시적 구역통계자료를 활용하여 도시성장분석상 이들 자료를 통합하여 활용하는 것이 유용함을 입증하고자 하였다. 연구대상지역은 대구광역시로 하였으며, 분석자료로 1985년과 2000년의 위성영상 Landsat TM-5 와 구역통계자료로 기초단위구를 이용하였다. 분석결과 위성영상자료는 도시의 확산 그리고 기초단위구는 밀도 분석이 용이하여 도시성장에 따른 확산과 밀도변화를 동시에 파악할 수 있었다.

• Architectural research
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• 제20권4호
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• pp.109-120
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• 2018

In the context of ever-faster urbanization, cities are becoming increasingly complex, and data collection to understand such complex relationships is becoming a very important factor. This paper focuses on the lighter weight of the method of collecting urban data, and studied how to use such complementary data collection using crowdsourcing. Especially, the method of converting mobile acceleration sensor information to urban trip information by combining with locational information was experimented. Using the parameters for transportation type classification obtained from the research, information was obtained and verified in Singapore and Zurich. The result of this study is thought to be a good example of how to combine raw data into meaningful behavior information.

• 한국농촌건축학회논문집
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• 제17권1호
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• pp.45-54
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• 2015

This study is about the Type classification of architectural assets in Seosungro (one of the 4 Roads of Rampart in Junggu, Daegu), the main stronghold of Urban Regeneration projects according to the recent Urban Regeneration law. The purpose of this study is to suggest the basic data about Operation management method of Original Downtown modern buildings and valuable hanok, and Conservational Regeneration of Architectural property of Urban Environmental Improvement and Architectural assets. By researching, analysing the feature and classifying the type of the buildings in Seosungro, The type classified Conservation plan can be suggested. The Types of the Architectural assets will be the basic data of the application plan of modern buildings which is for the urban regeneration, and this can predict the quantity and the demand of the building for effective urban regeneration, and also can be an effective Urban regeneration policy data.

• 대한원격탐사학회지
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• 제23권5호
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• pp.447-453
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• 2007

The demand for more accurate and realistic 3D urban models has been increasing more and more. Many studies have been conducted to extract 3D features from remote sensing data such as satellite images, aerial photos, and airborne laser scanning data. In this paper a technique is presented to extract and reconstruct 3D buildings in urban areas using airborne laser scanning data. Firstly all points in a building were divided into some groups by height difference. From segmented laser scanning data of irregularly distributed points we generalized and regularized building boundaries which better approximate the real boundaries. Then the roof points which are subject to the same groups were classified using pre-defined models by least squares fitting. Finally all parameters of the roof surfaces were determined and 3D building models were constructed. Some buildings with complex shapes were selected to test our presented algorithms. The results showed that proposed approach has good potential for reconstructing complex buildings in detail using only airborne laser scanning data.

• 한국수자원학회논문집
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• 제52권12호
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• pp.1087-1098
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• 2019

본 연구에서는 도시하천관리에 있어 이용되는 데이터를 수집, 정제 및 제공하는 기능을 수행하는 도시하천 통합데이터 플랫폼 개발을 수행하였다. 도시하천 통합데이터 플랫폼은 Open API서비스를 활용하여 다양한 기관에서 제공되는 데이터를 수집하는 기능을 가지고 있으며, 수집된 데이터는 전처리 과정을 통하여 정제되어 데이터베이스에 적재된다. 수집된 데이터는 시각화 시스템을 활용하여 검토 및 분석이 가능하며, 단위 Open API 형태로 제공되므로 도시하천모형에서 이를 조합하여 개별적인 입력자료로 활용할 수 있도록 하였다. 또한 실시간 데이터에 대한 제공시스템을 개발하여 도시하천모형에 실시간 데이터를 적용할 수 있도록 하였다. 이를 통하여 사용자는 데이터의 수집과 전처리, 입력자료 구축에 필요한 시간과 노력을 절감하여 도시하천관리 모형과 시스템의 개발에 있어 효율성과 확장성이 증대될 것으로 판단된다.

• 인간식물환경학회지
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• 제24권1호
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• pp.39-51
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• 2021

Background and objective: Urban topology can be characterized as impervious, which changes the hydrologic features of an area, increasing surface water flow during local heavy rain events. The pluvial flooding is also influenced by the vertical structures of the urban area. This study suggested a modified digital elevation model (DEM) to identify changes in urban hydrological conditions and segmentalized urban micro catchment areas using a geographical information system (GIS). Methods: This study suggests using a modified DEM creation process based on Rolling Ball Method concepts along with a GIS program. This method proposes adding realized urban vertical data to normal DEM data and simulating hydrological analyses based on RBM concepts. The most important aspect is the combination of the DEM with polygon data, which includes urban vertical data in three datasets: the contour polyline, the locations of buildings and roads, and the elevation point data from the DEM. DEM without vertical data (DCA) were compared with the DEM including vertical data (VCA) to analyze catchment areas in Shin-wol district, Seoul, Korea. Results: The DCA had 136 catchments, and the area of each catchment ranged from 3,406 m² to 423,449 m². The VCA had 2,963 catchments, with the area of each ranging from 50 m² to 16,209 m². The most important finding is that in the overlapped VCA; the boundary of areas directly affected by flooding and the direction of surface water flow could be identified. Flooding data from September 21, 2010 and July 27, 2011 in the Shin-wol district were applied as ground reference data. The finding is that in the overlapped VCA; the boundary of areas directly affected by flooding and the direction of surface water flow could be identified. Conclusion: The analysis of the area vulnerable to surface water flooding (SWF) was more accurately determined using the VCA than using the DCA.

• 대기
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• 제28권4호
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• pp.427-441
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• 2018

This study examines the impact of the urban parameterization scheme and the land cover change on simulated near surface temperature using Unified Model (UM) over the Seoul metropolitan area. We perform four simulations by varying the land cover and the urban parameterization scheme, and then compare the model results with 46 AWS observation data from 2 to 9 August 2016. Four simulations were performed with different combination of two urban parameterization schemes and two land cover data. Two schemes are Best scheme and MORUSES (Met Office Reading Urban Surface Exchange Scheme) and two land cover data are IGBP (International Geosphere and Biosphere Programme) and EGIS (Environmental Geographic information service) land cover data. When land use data change from IGBP to EGIS, urban ratio over the study area increased by 15.9%. The results of the study showed that the higher change in urban fraction between IGBP and EGIS, the higher the improvement in temperature performance, and the higher the urban fraction, the higher the effect of improving temperature performance of the urban parameterization scheme. 1.5-m temperature increased rapidly during the early morning due to increase of sensible heat flux in EXP2 compared to CTL. The MORUSES with EGIS (EXP3) provided best agreement with observations and represents a reasonable option for simulating the near surface temperature of urban area.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.470-472
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• 2003

The primary goal in this paper is to analyze urban growth patterns using multi-temporal remote sensing images and geographic information data. In order to accomplish this purpose, firstly data pre-processing is carried out, and then land-use maps are generated with ancillary data source by heads-up on-screen digitizing. Lastly, using the results of the previous stages, the patterns of land-use and urban changes are monitored by the proposed scheme. In this research, using the multi-temporal images and geographic information data, monitoring of urban growth was carried out with the application of urban land-use changes.

• 한국안전학회지
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• 제35권2호
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• pp.100-110
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• 2020

Recently, the frequency of typhoon and torrential rain due to climate change is increasing. In addition, the upsurge in the complexity of urban sewer network and impervious surfaces area aggravates the inland flooding damage. In response to these worsening situations, the central and local governments are conducting R&D tasks related to predict and mitigate the flood risk. Researches on the analysis of inundation in urban areas have been implemented through various ways, and the common features were to evaluate the accuracy and justification of the model by comparing the model results with the actual inundation data. However, the evaluation procesure using available urban flooding data are not consistent, and if there are no quantitative urban inundation data, verification has to be performed by using press releases, public complaints, or photos of inundation occurring through 'CCTV'. Because theses materials are not quantitative, there is a problem of low reliability. Therefore, this study intends to develop a comparative analysis procedure on the quantitative degree and applicability of the verifiable inundation data, and a systematic framework for the performance assessment of urban flood analysis model was proposed. This would contribute to the standardization of the evaluation and verification procedure for urban flooding modelling.