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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society for Geospatial Information System
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Journal DOI :
The Korean Society for Geospatial Information System
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Volume & Issues
Volume 13, Issue 4 - Dec 2005
Volume 13, Issue 3 - Sep 2005
Volume 13, Issue 2 - Jun 2005
Volume 13, Issue 1 - Mar 2005
Selecting the target year
A Study on the Extraction of Road & Vehicles Using Image Processing Technique
Ga, Chill-O ; Byun, Young-Gi ; Yu, Ki-Yun ; Kim, Yong-Il ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 3~9
The extraction of traffic information based on image processing is under broad research recently because the method based on image processing takes less cost and effort than the traditional method based on physical equipment. The main purpose of the algorithm based on image processing is to extract vehicles from an image correctly. Before the extraction, the algorithm needs the pre-processing such as background subtraction and binary image thresholding. During the pre-processing much noise is brought about because roadside tree and passengers in the sidewalk as well as vehicles are extracted as traffic flow. The noise undermines the overall accuracy of the algorithm. In this research, most of the noise could be removed by extracting the exact road area which does not include sidewalk or roadside tree. To extract the exact road area, traffic lanes in the image were used. Algorithm speed also increased. In addition, with the ratio between the sequential images, the problem caused by vehicles' shadow was minimized.
The Development of PDA_based Mapping System Using Totalstation
Bae, Sang-Ho ; Lee, Young-Geol ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 11~17
This study is to improve the modification of survey data and efficiency of update using digital map based on PDA_based surveying mapping system. This object is achieved by developing wireless communication module of PDA which is adaptable to Totalstation, and contents for its usage. It is achieved by drawing up transformation module of dxf file to editing the text file and the drawing. And it is achieved by drawing up modification module to layer control. This system will be efficiently used to surveying parts of spatial location information for real time mapping ind point positioning in field work.
Extraction of Road Surface Freezing Section using GIS
Choi, Byoung-Gil ; Kim, Joong-Sik ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 19~25
This study suggests a method for securing road safety by extracting the expected surface freezing section in planning a route using GIS. When planning a road construction in a mountainous area it is possible to confront surface freezing especially in the wintertime. In addition, it is required assessment data of surface freezing rates in the case of turnkey inspections of newly constructed or expanded roads. Consequently, an analysis method that can quantitatively estimate the surface freezing section and sunshine influence on each section of a road is needed. We can extract the expected surface freezing section which amounted to around 29km of the Donghae highway, with such techniques as three-dimensional modeling, sunshine simulation geographical database construction and spatial analysis using the overlay function of the GIS spatial analysis. This study can be used as a method to assess advance safety which has a direct influence on planning the blueprint that should be approved by a policy maker after efficiently understanding the expected surface freezing section in accordance with hill shade.
Automatic Generation of DEM using LIDAR Data
Lee, Jeong-Ho ; Han, Su-Hee ; Yu, Ki-Yun ; Kim, Yong-Il ; Lee, Byung-Kil ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 27~32
DEM is needed for urban modeling, forecasting of floods and the analysis of slope and aspect. It has been generated using digital maps, aerial photos or satellite imageries. Recently, however, many studies on DEM generation from LiDAR data has been conducted because of its efficiency and accuracy. Filtering is said to be the process of making DEM by eliminating non-ground points from LiDAR data. In most researches, some input parameters such as the size of filter are required. The purpose of this investigation is to automatically obtain DEM by eliminating objects of various sizes without the knowledge of the objects' sizes. The experimental results show that most of objects on steep terrain are eliminated by the proposed method.
A Study on Segmentation of Building Points Utilizing Scan-line Characteristic of Airborne Laser Scanner
Han, Su-Hee ; Lee, Jeong-Ho ; Yu, Ki-Yun ; Kim, Yong-Il ; Lee, Byung-Kil ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 33~38
The goal of this study is to segment building points effectively utilizing scan-line characteristics of airborne laser scanner. Points are classified as to their altitude similarity and adjacency with other classified points, and point searching range for the classification is restricted within some number of scan-lines, preventing classification speed from lowering as the process goes on. Besides, we detected wrong discrimination of one object into more than two classes, then integrated them into a single class. Consequently we could discriminate points of each building from others, its annexes and none building points simultaneously.
Optimal Route Location using Possible Traffic Capacity and Virtual Running and Application at Road Design in the City Centre
Choi, Hyun ; Song, Suck-Jin ; Kang, In-Joon ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 39~46
This paper use virtual running after possible traffic capacity application for optimal route location. General road is designed the design after we examine an alternate adequacy investigation and an execution design sufficiently. Various road user's requirement must be reflected from the beginning. But it is difficult to contain the various suitable design criteria because we consider the existing 2-dimension element. First of all, this study chose optimal route, used traffic assignment and 3D simulation. Then selected optimal route through the consistent road construction by analyzing road driving simulation of 3-dimension data and the urban landscape. possible traffic capacity and virtual running will be able to do the urban landscape analysis harmonizing with the environment; equally, it could be objectively solve the problem of a civil appeal.
Survey of Bedrock Quality and Suitable Site for Crushed Stones using GIS in the Wondeung Area
Lee, Jin-Young ; Yang, Dong-Yun ; Kim, Ju-Yong ; Hong, Sei-Sun ; Yun, Hyun-Soo ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 47~58
Investigation of bedrock quality and the legal restriction for developing the aggregate resources were carried out with GIS in the Wondeung area Gokseong-gun, Jeollanam-do province. Firstly, we surveyed the exposed bedrocks in the field and examined in physical properties in the lab. Secondly we analyzed the legal restriction by using GIS based on bufferzone and viewshed analysis. At the results of this study, the area can be used totally as the crushed stones. However the suitability sites of crushed stone have various regulations. So the legal restriction is the principal standard to develop the crushed stone in the Wondeung area. Suitable site for crushed stones are about 30% in the Wondeung area.
Detection of Urban Expansion and Surface Temperature Change using Landsat Satellite Imagery
Song, Yeong-Sun ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 59~65
It is very important to detect land cover/land use change from the past and to use it for future urban plan. This paper investigated the application of Landsat satellite imagery for detecting urban growth and assessing its impact on surface temperature in the region. Land cover/land use change detection was carried out by using 30m resolution Landsat satellite images and hierarchial approach was introduced to detect more detail change on the changing area through high resolution aerial photos. Also, surface temperature according to land cover/land use was calculated from Landsat TM thermal infrared data and compared with real temperature to analyze the relationship between urban expansion and surface temperature. As a result, the urban expansion has raised surface radiant temperature in the urbanized area. The method using remote sensing data based on GIS was found to be effective in monitoring and analysing urban growth and in evaluating urbanization impact on surface temperature.
Creating Mosaic Image of the Korean Peninsula from CORONA Imagery
Song, Yeong-Sun ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 67~73
The urbanization of Korea has been rapidly progressed since 1960, but satellite imagery have provided the information only after 1975. Recently released CORONA imagery is one of the few source of satellite image which can provide 1960's topographic information of the Korean Peninsular. It can be applied to change detection in various fields such as urban, forest, and environmental planning. In this research mosaic image of past Korean Peninsular using CORONA imagery in the 1960s were generated. A polynomial equation and a modified collinearity equation were applied for geo-referencing and a comparative analysis was conducted. In this research the 2nd polynomial equations were used for geo-referencing of CORONA imagery. After carrying out geo-referencing, mosaic image was generated using Erdas Imagine. It is assumed that this result image is very useful for various fields such as generation of thematic maps, urban planning, and change detection.
RM-ODP Application and Architecture Design for National Integrated Geospatial Portal
Shin, Dong-Bin ; Park, Si-Young ; Jeong, Jin-Seok ; Kim, Dong-Han ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 4, 2005, Pages 75~81
This study intended to show the way of evolving 'National Geographic Information Clearinghouse' to 'National Integrated Geospatial Portal'. For this purpose we have analyzed Geospatial One-Stop Portal in the US and then suggested future model of National Geographic Information Clearinghouse. The Integrated Geospatial Portal model is based on the Reference Model for Open Distributed Processing(RM-ODP) which is an international model for information distribution and sharing. The Integrated Geospatial Portal architecture consists of the data layer, middle-ware, presentation layer. It will help users to determine their fitness for nation wide GIS application and provide tools for accessing, visualizing, or ordering various geospatial data.