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Software Analysis and Design of the Image Acquisition Subsystem Using the Unified Modeling Language
Yom, Jae-Hong Korean Society of Surveying 2001 Korean journal of geomatics Vol.1 No.1
Geospatial database, which is the basis for Geo-Spatial Information Systems, is produced by conventional mapping methods. Recently, with increased demand for digital forms of the geospatial database, studies are carried out to automate its production. The automated mapping system is composed of the image acquisition subsystem, positioning subsystem, point referencing subsystem and the visualization subsystem. The image acquisition subsystem is the most important part of the overall production line because it is the starting point and will affect all subsequent processes. This paper presents a software analysis and design of the image acquisition subsystem. The design was carried out using the Unified Modeling Language which is a modeling method used extensively in the software engineering field.
실시간 재해 공간 DB 수집을 위한 구제역 방문조사 모바일 웹앱 구축
박예진,염재홍,Park. YeJin,Yom. Jae-Hong 한국방재학회 2013 한국방재학회논문집 Vol.13 No.6
2010년 11월말, 발생한 구제역은 초동 방역 조치가 늦어지면서 전국적인 피해가 발생하였다. 특히 전파매개체에 대한 파악이 늦어지면서 확산 범위를 키우게 된 것으로 분석되었는데 이는 다양한 구제역 전파 매개체에 대한 정보가 지역적으로 분산되어 있고 방역의 핵심 정보인 농장 방문 정보가 수집되지 않아 신속한 의사 결정 및 대책 수립의 한계가 나타났다. 따라서 신속하게 분산된 정보를 수집하고 실시간 분석이 가능하도록 공간적인 요소를 고려하는 것이 필요하다. 본 연구에서는 구제역 발생시나리오에 최적화된 위치기반 형태의 공간 DB(Database)를 설계하고, 이동성, 접근성, 휴대성의 이점이 있는 스마트폰을 통해 농가 방문자들의 이력정보를 실시간으로 DB화하는 구제역 방문조사 모바일 웹앱 시스템을 구축하였다. 구축된 시스템은 전파매개체에 대한 정보를 즉각적으로 파악하여 신속한 의사 결정과 방역 조치에 효율을 높이고자 한다. The end of November 2010, foot-and-mouth disease(FMD) is damage occurred nationwide due to delay of preventive measures. It was analyzed that the spread range raised delayed propagation medium. It was regionally distributed a variety of information about FMD propagation medium and appeared limit of rapid making-decision and measure establish because it was` t collected farm`s visit information about quarantine measures. Therefore it is necessary to real-time analysis and collect distributed information considering the elements of the spatial. The study was designed spatial DB optimized scenario of FMD occurrence based location and constructed FMD investigation mobile webapp system of real-time DB of information of farm`s visitor using moility, accessibility, portability benefits of smart phone. This system understand immediately farm`s visit information and can be improved rapid making-decision and quarantine measures.
3-Dimensional Building Reconstruction with Airborne LiDAR Data
Lee, Dong-Cheon,Yom, Jae-Hong,Kwon, Jay-Hyoun,We, Gwang-Jae Korean Society of Surveying 2002 Korean journal of geomatics Vol.2 No.2
LiDAR (Light Detection And Ranging) system has a profound impact on geoinformatics. The laser mapping system is now recognized as being a viable system to produce the digital surface model rapidly and efficiently. Indeed the number of its applications and users has grown at a surprising rate in recent years. Interest is now focused on the reconstruction of buildings in urban areas from LiDAR data. Although with present technology objects can be extracted and reconstructed automatically using LiDAR data, the quality issue of the results is still major concern in terms of geometric accuracy. It would be enormously beneficial to the geoinformatics industry if geometrically accurate modeling of topographic surface including man-made objects could be produced automatically. The objectives of this study are to reconstruct buildings using airborne LiDAR data and to evaluate accuracy of the result. In these regards, firstly systematic errors involved with ALS (Airborne Laser Scanning) system are introduced. Secondly, the overall LiDAR data quality was estimated based on the ground check points, then classifying the laser points was performed. In this study, buildings were reconstructed from the classified as building laser point clouds. The most likely planar surfaces were estimated by the least-square method using the laser points classified as being planes. Intersecting lines of the planes were then computed and these were defined as the building boundaries. Finally, quality of the reconstructed building was evaluated.
Ariuntsetseg Enkhbaatar,염재홍(Yom, Jae-Hong) 한국측량학회 2013 한국측량학회 학술대회자료집 Vol.2013 No.4
Agent-based epidemic models attempt to simulate disease transmission and associated control measures. Further statistical analysis of simulation result is necessary for greater understanding of the disease spatial diffusion. This study proposes the integration of modeling and result analysis as a single process by the adoption of the NetLogo and the R software. In this study, we performed spatially explicit agent-based epidemiological modeling using RNetLogo package which is an integration tool of NetLogo in R. The model is implemented using foot-and-mouth-disease(FMD) outbreak in South Korea as a case study. Analysis of simulation results can help to improve comprehension of disease spread dynamics and to take better steps towards the prevention and control of a FMD outbreak.