모바일 GIS를 이용한 지리정보 서비스 향상방안에 관한 연구

전철민(Jun Chulmin) 한국지적학회 2004 한국지적학회지 Vol.20 No.1

정보기술이 빠르게 발달하면서 정보의 제공수단으로서 모바일 기기의 사용이 증가하고 있다. 주로 데스크탑이나 웹을 대상으로 개발되어 왔던 GIS의 응용프로그램들이 최근에는 무선기기에서도 시도되고 있다. 그러나 무선환경에서 GIS를 서비스하기에는 몇 가지 문제점이 존재한다. 그 중에 하나는 GIS데이터가 일반 bitmap이나 vector포맷의 전송보다는 복잡하거나 파일크기가 크다는 것이다. 또 하나의 문제는 GIS 응용프로그램들이 특정 플랫폼을 대상으로 개발되고 있어 상호간 데이터 호환이 어렵다는 것이다. 이러한 문제의 해결책으로 제시되고 있는 것이 플랫폼에 상관없이 인터넷상에서 데이터 전송이 가능딴 XML기술이며, 지리정보분야에서는 XML에 근거한 문서규약으로서 GML이 개발되어 주목을 받고 있다. GML은 SVG와 같은 plug-in을 다운로드 받아서 간단히 디스플레이 될 수 있다. 번 연구에서는 지리정보의 전송수단들을 상호 비교함으로써 GML의 유용성을 분석하고, GML을 이용한 모바일 GIS 서비스의 구축전략을 논의한다. Due to the fast development of information Lechnology, mobile devices such as cellular phone and PDA are increasingly being used in linformation transmission GIS applications, which have primarily been developed for Desk-tops or Webs, are beginning to be adopted in mobile devices. However, communicating geographic information in mobile environment has some limitations. One of the problems is that GIS data are generally complex of big in size compared to bitmap and vector format. The other found in current applications is that each of them is developed for a specific platform. A solution to this problem has been sought using the XML, which is designed to transfer structured information through the internet regardless of platform types. In GIS area, GML is receiving attention as the document specification for geographic feature based on XML technology GML can be visualized simply using client plug-ins such as SVG. This study compares different data formals for transmitting geographic features and then suggests the framework for developing a mobile-GIS service using GML.

Space Syntax 기법의 대중교통망 적용 방안에 관한 연구

전철민(Chulmin Jun) 대한공간정보학회 2004 대한공간정보학회지 Vol.12 No.2

Fuzzy-LP와 GIS의 결합을 통한 토지의 최적 이용문제

전철민(Jun, Chulmin) 한국측량학회 2002 한국측량학회지 Vol.20 No.3

유전자 알고리즘과 GIS를 이용한 대중교통 경로선택에 관한 연구

전철민(Jun, Chulmin) 한국측량학회 2003 한국측량학회지 Vol.21 No.4

Space Syntax를 이용한 경로탐색 개선 방법에 대한 연구

전철민(Jun Chulmin),장민철(Chang Min-Chol),설재민(Seol Jaemin) 대한공간정보학회 2004 한국지형공간정보학회 학술대회 Vol.2004 No.3

도로 네트워크를 따른 교통사고 핫스팟의 시각화

조나혜,전철민,강영옥,Cho, Nahye,Jun, Chulmin,Kang, Youngok 한국국토정보공사 공간정보연구원 2018 지적과 국토정보 Vol.48 No.1

In recent years, the number of traffic accidents caused by car accidents has been decreasing steadily due to traffic accident prevention activities in Korea. However, the number of accidents in Seoul is higher than that of other regions. Various studies have been conducted to prevent traffic accidents, which are human disasters. In particular, previous studies have performed the spatial analysis of traffic accidents by counting the number of traffic accidents by administrative districts or by estimating the density through kernel density method in order to identify the traffic accident cluster areas. However, since traffic accidents take place along the road, it would be more meaningful to investigate them concentrated on the road network. In this study, traffic accidents were assigned to the nearest road network in two ways and analyzed by hotspot analysis using Getis-Ord Gi* statistics. One of them was investigated with a fixed road link of 10m unit, and the other by computing the average traffic accidents per unit length per road section. As a result by the first method, it was possible to identify the specific road sections where traffic accidents are concentrated. On the other hand, the results by the second method showed that the traffic accident concentrated areas are extensible depending on the characteristic of the road links. The methods proposed here provide different approaches for visualizing the traffic accidents and thus, make it possible to identify those sections clearly that need improvement as for the traffic environment.

교통카드 데이터를 이용한 버스 승객 대기시간 최소화 알고리즘 개발

전상우,이정우,전철민,Jeon, Sangwoo,Lee, Jeongwoo,Jun, Chulmin 대한공간정보학회 2014 한국공간정보학회지 Vol.22 No.5

Bus headway plays an important role not only in determining the passenger waiting time and bus service quality, but also in influencing the bus operation cost and passenger demand. Previous research on headway control has considered only an hourly difference in the distribution of ridership between peak and non-peak hours. However, this approach is too simple to help manage ridership demand fluctuations in a short time scale; thus passengers' waiting cost will be generated when ridership demand exceeds the supply of bus services. Moreover, bus ridership demand varies by station location and traffic situation. To address this concern, we propose a headway control algorithm for minimizing the waiting time cost by using Smart Card data. We also provide proof of the convergence of the algorithm to the desired headway allocation using a set of preconditions of political waiting time guarantees and available fleet constraints. For model verification, the data from the No. 143 bus line in Seoul were used. The results show that the total savings in cost totaled approximately 600,000 won per day when we apply the time-value cost of waiting time. Thus, we can expect that cost savings will be more pronounced when the algorithm is applied to larger systems.

보행자의 물리적 특성을 반영한 CA기반 보행모델

남현우,곽수영,전철민,Nam, Hyunwoo,Kwak, Suyeong,Jun, Chulmin 대한공간정보학회 2014 한국공간정보학회지 Vol.22 No.2

The floor field model is the micro pedestrian model based on a cellular automata for modeling pedestrian movement in the interior space using the static and dynamic floor field. It regards a form of pedestrian as square but the actual pedestrian's shape and size are similar to ellipsoid or rectangle. Because of this, we are difficult to give a rotation effect to pedestrians and there is a limit to reflect an impact of clogging and jamming. Also, this model is not able to reflect an impact of a posture and visibility effectively in the pedestrian movement. In this study, we suggest the improved pedestrian model incorporating the actual shape and size of pedestrian. The pedestrian's shape is defined not square but rectangle which is close to the actual body size of Korean. Also, we define the model which is able to represent the impact of clogging and jamming between pedestrians by adding the pedestrian's posture. We develop the simulator for testing the suggested model and study the difference between two models by comparing a number of effects. As a result, we could confirm solving the problem with dynamic value in the existed model and reflecting the panic effect in evacuation situation.

자전거 이용 시설물의 균형적인 관리를 위한 평가 - 송파구 역세권을 대상으로

김지연,김혜영,전철민,Kim, JiYeon,Kim, HyeYoung,Jun, ChulMin 대한공간정보학회 2013 한국공간정보학회지 Vol.21 No.3

Continuous management of bicycle facilities is needed, as uses of bicycles are increased. In the previous studies, evaluation of bicycle facilities were performed mainly from the surveys to bicycle users and experts. This study aims to evaluate the facilities for bicycle uses by setting up the quantitative assessing measures for the purpose of contributing to balanced management of the facilities for bicycle uses. Based on the existing measures provided in the previous studies about conditions for bicycles users, the variables of the facilities that are available and quantifiable were derived, and the scales of the facilities were set up. For evaluation, the station influence areas in Songpa District were selected as test areas. The methods for analysis were, first, to carry out the 'bicycle roads-facilities' analysis, which was modified from quadrant method. Consequently, individual facilities and station areas were relatively examined. Second, by principal component analysis, bicycle facilities were analyzed in a general and integrated way. From that, the variables sharing common characteristics were grouped, similar types of stations influence areas were found out, and then the groups were ranked.

EgresSIM을 이용한 대형건축물의 미시적 대피시뮬레이션

곽수영,남현우,전철민,Kwak, Suyeong,Nam, Hyunwoo,Jun, Chulmin 한국시뮬레이션학회 2016 한국시뮬레이션학회 논문지 Vol.25 No.1

This paper introduces 'EgresSIM', which is microscopic evacuation simulation software. EgresSIM developed in this paper is a three-dimensional (3D) pedestrian evacuation simulator based on the improved model advanced from the floor field model(FFM), a microscopic pedestrian model. This software can simulate large size buildings that consist of a number of floors, stairs, rooms, and exit doors. Moreover, this software can arrange several hundreds or thousands of pedestrians in indoor space and check their movements through the 3D viewer in real time, as well as produce detailed results about evacuation situations such as which paths are employed by individual pedestrians, how long does it takes to evacuate, and how many evacuees are gathered at each of the exit doors. Building data needed in the simulation are constructed as XML files according to pre-defined indoor data models and information of simulation results is also created as XML log files. A moving pattern of pedestrians can be represented in many ways by adjusting the sensitivity parameters of two walk models supported by EgresSIM. Thus, evacuation simulation can be done based on many assumptions of situations such as movement to the nearest exit door or blackout after outage.