• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.36 no.6
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• pp.611-620
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• 2018

With the revitalization of alley market area becoming a major goal of the urban regeneration project, an understanding on customer characteristics that affect the sales of alley market areas is needed. As spatial heterogeneity appears to exist in alley market areas, the use of GWR (Geographically Weighted Regression) is required as an alternative to OLS (Ordinary Least Squares) regression. This study analyzes effects of customer characteristics on sales of 1007 alley market areas in Seoul. Comparing R squared and AICc, results show that GWR is better than OLS regression. According to OLS regression, the ratio of female, the ratio of 40's and 50's, the number of employees, the opening rate of establishment, the density of building and the size of alley market area have positive effects on sales, while the ratio of 20's and 30's, the distance of bus stop and that of subway station have negative effects. As a result of comparing local regression coefficients of geographically weighted regression analysis, the ratio of female customers has the greatest effect on the northwestern region, followed by the southwestern region, the central region and the northeastern region. The ratio of 20's and 30's and that of 40's and 50's effect on the southeastern and northeastern regions, and then the southwestern region. It is expected that this study will help to identify marketing target for each alley market area.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.20 no.5
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• pp.130-145
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• 2021

As part of the Smart Seoul policy, the importance of using big urban data is being highlighted. Furthermore interest in the impact of transportation-related urban environmental factors such as PM10 and noise on citizen's quality of life is steadily increasing. This study established the integrated DB by matching IoT big data with transportation data, including traffic volume and speed in the microscopic Spatio-temporal scope. This data analyzed the impact of a spatial unit in the road-effect zone on environmental risk level. In addition, spatial units with similar characteristics of road traffic and environmental factors were clustered. The results of this study can provide the basis for systematically establishing environmental risk management of urban spatial units such as PM10 or PM2.5 hot-spot and noise hot-spot.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.2D
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• pp.205-216
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• 2008

Urban freeway is defined as the roadway with 4 lanes or more which requires a high design criteria for handling a large capacity of vehicles rapidly as a high-speed exclusive roadway in the city. However, most of the urban freeways suffer from severe traffic congestion due to the increased traffic exceeding their capacities regardless of the morning and afternoon rushhours or the inbound and outbound directions. The purpose in this study is to collect and investigate the real-time traffic characteristics based on the ramp junction influence areas of the urban freeway connected with the Busan port, compare and analyze the traffic characteristic relationship for each lane within the ramp junction influence areas, and finally assess and suggest the optimal capacity for each lane within the ramp junction influence areas.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.1D
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• pp.119-127
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• 2008

Nowaday, the local governments eager to change their transport system aiming for public transport oriented one. However, it is more important to change the land use system in the catchment areas of public transport in order to enhance its usage sustainably for the long run. This research aims to seek maximal spatial extent of the catchment areas of the Seoul Metropolitan Subway in consideration of its urban spatial structure in order to accommodate the potential users living around the subway stations. For this task the empirical data of the household travel survey for the Seoul Metropolitan Area conducted 2002 were analysed. It was founded that the walking access times to the subway stations, which can represent their spatial extents, are related to their travel times, but differently according to their given positions in the urban spatial structure. The characteristics of subway commuters also affect them with the conditions. It is to be expected that the results of this research can contribute to an enhancement of its usage by applying to land-use policies of the catchment areas.

• Proceedings of the KGS Conference
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• 2001.05a
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• pp.145-150
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• 2001

• Journal of Korean Society of Transportation
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• v.27 no.2
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• pp.15-22
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• 2009

There exist some limits when we forecast urban railway demand by traditional 4 step model. The first reason is that the model based on socioeconomic data by an administrative unit, 'Dong', yields a 'Dong' unit trip matrix. But a 'Dong' often has two or more stations. The second reason is that urban railway demand by station would be affected rather by station access area on foot than by a 'Dong' unit. So the model based on 'Dong' characteristic data have some inaccuracies in itself. Owing to the limits of the model based on 'Dong' unit data, there exits some difficulty in forecasting urban railway demand by station. So this paper studied two alternatives. The first is to forecast the demand by using the data of station access area on foot rather than 'Dong' unit data. This needs too much time and effort to collect data and analyse them, while the accuracy of the model didn't improve a lot. The second is to adjust the location of 'Dong' centroid and the length of centroid connector link. By this way we can reflect the characteristics of station access area on foot under traditional 4 step model. Comparing the expected demand to the observed data for each station, the result looks like very similar.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.249-249
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• 2012

기후변화의 영향으로 폭우발생 빈도 및 강도는 최근 들어 급증하고 있다. 빈번히 발생하는 대형 폭우에 의해 도시는 홍수와 산사태 등 많은 자연재해가 발생하고 있다. 최근 도시에서 발생한 대형 폭우재해의 1차적인 원인은 도시방재시설물 설계빈도를 상회하는 집중호우이지만, 방재를 고려하지 않은 도시계획 및 설계가 피해를 가중시킨 것으로 판단되고 있다. 대형화 및 일상화되어가는 폭우재해에 적응하기 위해서는 하수관거, 제방 등 전통적인 방재시설물 설계기준을 상향조정하는 구조물적 대책뿐만 아니라, 도시의 토지이용, 공원, 녹지, 광장, 도로 등의 구성요소를 활용하여 우수유출 저감 및 지연시켜 최대홍수량을 낮추는 비구조물적 적응방안도 필요하다. 기후변화에 따른 폭우재해에 도시차원에서 효과적으로 적응하기 위해서는, 다양한 폭우재해 적응 도시계획 및 설계기법을 개발하고, 그 효과를 시뮬레이션 할 수 있는 시스템 개발이 필요하다. 본 연구에서는 기존에 개발된 홍수 및 산사태 관련 시스템들과 연계하고 정부의 다양한 부처에서 구축된 DB를 최대한 활용하여 폭우에 의해 발생하는 도시 홍수와 산사태 피해지점과 피해 영향권을 분석뿐만 아니라 폭우재해 적응 도시계획 및 설계기법을 효율적으로 적용할 수 있는 관리지역을 도출하고, 관리지역에 폭우재해 적응 도시계획 및 설계기법 적용시 효과를 분석할 수 있는 기후변화 폭우재해 적응 도시조성 시뮬레이션 시스템 개발방향을 제시한다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.4D
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• pp.469-476
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• 2008

Recently, TOD gains popularity as a traffic solution measure of high density urban regeneration projects. The purpose of this study is to investigate traffic impacts of high density TOD projects, and to identify the issues to be resolved. For a case study, it chooses Gangnamgucheong station in Gangnam area served by two subway lines, and designates 400m radius from the station as a site for high-density development. The MOEs chosen for this study is traffic volume, time, distance, speed, and mode share. The SECOM model is adopted for traffic simulation. The analysis results show that high-density TOD is an effective tool for traffic improvement even with only one station area being implemented. It is found that the traffic volume increases near the station in nature where high-density development occurs, but it declines overall in the rest of Gangam area. The total travel time and distance of passenger vehicles decline, meaning that the traffic condition becomes better than before. With regulation on parking supply, the improvement becomes more vivid. In terms of the changes of traffic speed, both alternatives show 4.1% increase in speed, but the difference between alternatives is not quite noticeable because of the induced vehicle demand driven to the streets with improved traffic condition. The mode share changes occur for the benefit of subway ridership, because the study station is equipped with two subway line services. When mixed with parking supply restriction, the impact becomes clearer.

• Journal of the Korean Institute of Landscape Architecture
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• v.32 no.6 s.107
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• pp.1-13
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• 2005

본 연구는 서울시 도시녹지를 1평을 늘리는 것에 대한 시민들의 지불의사금액(WTP)을 이단계 이선 가상가치법으로 계산함으로써 도시녹지의 경제적 가치를 평가하고, WTP에 영향을 미치는 변수들의 종류와 영향력 정도를 밝히기 위해 수행되었다. 지불도구는 기금이었으며, 'fat-tail problem'없이 WTP를 계산하기 위해 생존분석을 사용하였다. 분석 결과, 서울시민들은 생활녹지 1평을 늘리는데 약 23,400원을 기부할 용의가 있었다. WTP에 영향을 주는 변수는 자연환경태도(NEP), 구조적 제한요소, 소득 및 환경보전을 위해 편리함을 양보할 의사이었다. 본 연구의 결과는 도시녹지의 개발 또는 보존과 관련된 정부의 의사결정이나 도시녹지 관련 예산 확충을 요구할 수 있는 기본 자료로 활용할 수 있을 것이다.

• Journal of the Korean Institute of Landscape Architecture
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• v.51 no.3
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• pp.54-69
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• 2023

This study investigated the distribution of users in urban parks to overcome the limitations of existing research, which made it difficult to determine where data came was collected. It aimed to provide implications for park planning and management based on user distribution using mobile signal data. Five urban parks in Seongdong-gu, Seoul, with various physical characteristics, were selected. Mobile signal data provided by the Seoul Big Data Campus was used to identify the distribution of user inflow through hot spot analysis per park. The relationship between urban context and park influence area was derived. Seoul Forest (P1) and Seongsu Park (P3), which have a high proportion of commercial spaces around the park, showed wider user hotspots compared to Eungbong Park (P2), Dokseodang Park (P4), and Daehyunsan Park (P5), which were located in residential areas. Parks with a significant presence of commercial spaces had a broader influence, while parks with larger sizes and gentle slopes exhibited wider influence areas. This study proposed a novel data-based approach to urban park planning and management based on the inflow distribution of park users. Through this research, valuable insights were derived that could be utilized for urban park planning and management, aiming to enhance the effectiveness and efficiency of park utilization.