Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Association of Geographic Information Studies
Journal Basic Information
Journal DOI :
The Korean Association of Geographic Information Studies
Editor in Chief :
Volume & Issues
Volume 4, Issue 4 - Dec 2001
Volume 4, Issue 3 - Sep 2001
Volume 4, Issue 2 - Jun 2001
Volume 4, Issue 1 - Mar 2001
Selecting the target year
A Study on the Performance of Parallelepiped Classification Algorithm
Yong, Whan-Ki ;
Journal of the Korean Association of Geographic Information Studies, volume 4, issue 4, 2001, Pages 1~7
Remotely sensed data is the most fundamental data in acquiring the GIS informations, and may be analyzed to extract useful thematic information. Multi-spectral classification is one of the most often used methods of information extraction. The actual multi-spectral classification may be performed using either supervised or unsupervised approaches. This paper analyze the effect of assigning clever initial values to image classes on the performance of parallelepiped classification algorithm, which is one of the supervised classification algorithms. First, we investigate the effect on serial computing model, then expand it on MIMD(Multiple Instruction Multiple Data) parallel computing model. On serial computing model, the performance of the parallel pipe algorithm improved 2.4 times at most and, on MIMD parallel computing model the performance improved about 2.5 times as clever initial values are assigned to image class. Through computer simulation we find that initial values of image class greatly affect the performance of parallelepiped classification algorithms, and it can be improved greatly when classes on both serial computing model and MIMD parallel computation model.
GIS Applications for Optimum Site Selection of Public Facility
Kim, Jae Ik ; Chung, Hyun Wook ;
Journal of the Korean Association of Geographic Information Studies, volume 4, issue 4, 2001, Pages 8~20
The main purpose of this study is to introduce a new method of evaluation, and to suggest how to apply geographic information system for optimum public facility site selection. For this purpose, a new evaluation model for the site selection is developed. The model provides a simple and easy method of evaluation. It also allows differences among location factors through two step weighting procedures. For a better understanding of the model, solution procedures and visual figures are illustrated with the case of Dalseong-Gun's city hall location example.
Integrated Water Distribution Network System using the Mathematical Analysis Model and GIS
Kwon, Jae-Seop ; Jo, Myung-Hee ;
Journal of the Korean Association of Geographic Information Studies, volume 4, issue 4, 2001, Pages 21~28
In this study, GNLP(GIS linked non-linear network analysis program) for pipeline system analysis has been developed. This GNLP gets the input data for pipeline analysis from existing GIS(geographic information system) data automatically, and has GUI(graphic user interface) for user. Non-Linear Method was used for hydraulic analysis of pipe network based on Hazen-Williams equation, and Microsoft Access of relational database management system(RDBMS) was used for the framework of database applied program. GNLP system environment program was improved so that a pipe network designer can input information data for hydraulic analysis of pipeline system more easily than that of existing models. Furthermore this model generate output such as pressure and water quantities in the form of a table and a chart, and also produces output data in Excel file. This model is also able to display data effectively for analysed data confirmation and query function which is the core of GIS program.
Utilizing Geographic Information System for Analyzing Land Use Suitability in a Urban Area - A Case Study of Kumi City -
Lee, Jin-Duk ; Lee, Hyun-Hwa ; Kim, Sung-Gil ;
Journal of the Korean Association of Geographic Information Studies, volume 4, issue 4, 2001, Pages 29~38
This study addresses the topic of suitability analysis for helping with land use planning, which is one of important decision-making in urban planning, utilizing geographic information system. Covering the Kumi City before integrating with neighbor county, the site suitabilities for land uses, which are categorized into residential, commercial, industrial and green, were analyzed using the overlay method based upon the database constructed for this study. In the process, assessment criteria which include environmental factors and relative weights were determined and also the land use/cover map and NDVI map which were generated through satellite image processing were included in the database. The suitability maps by four function spaces were derived according to the grade and compared with the present land use state and the land use concept map of urban master plan. For more accurate analysis, practical developing plan, land price data, soil data should be included. Also if the demand estimation data by each land use had been added, the reliability of location allocation could have been raised.
Coastline Change on the Haeundae Beach using the Digital Aerial Photo
Choi, Chul-Uong ; Kim, Young-Seup ;
Journal of the Korean Association of Geographic Information Studies, volume 4, issue 4, 2001, Pages 39~50
There has been considerable controversy over the changes in the size of the beaches in the Pusan area; any loss of beach area will have an immense effect on the tourism industry, which is an important source of income for the local economy. The best beaches in Korea are in the Pusan area and were visited by more than 8 million persons in 2000. It is expected that the number of visitors, drawn to the scenic vistas and convenient facilities of this area, will increase annually. Any loss in the size of these swimming beaches will have an important negative effect on tourism income. Therefore, the local governments have gone to great lengths to preserve these beaches, transporting tens of thousands of tons of sand to the beaches before they open each year at a cost of billions of won annually. In this study, we analyzed aerial photographs and tide data for the past 50 years using digital aerial photo analysis and GIS techniques for each 3-year interval. We abstracted beach DEM (digital elevation model) and ortho aerial photographs, and conducted a space analysis. As a result, we were able to identify changes in the area and width of sections of Haeundae Beach.
The Anlysis of Fractal Characteristics in River Basin using GIS
Cha, Sang-Hwa ; Kwon, Kee-Wook ;
Journal of the Korean Association of Geographic Information Studies, volume 4, issue 4, 2001, Pages 51~60
This study analyzed fractal characteristics of river basin by using GIS. In this study, topographical factors in river basin was grid-analyzed for each cell size by using GIS and regression formula was derived by analyzing correlation among topographical factors and cell size which were calculated here. And, analysis of fractal characteristics of river by using the result calculated from 1) showed that among topographical factors, river length only increases according as cell size increases. The result of calculating fractal dimension for each cell size shows that river length, basin area, and centroidal flow path are 1.028, 1.0026 and 1.0061 respectively.
A Study on the Ground Surface Area Calculation of Golf Course using Triangulated Irregular Network
Kim, Sang-Seok ; Chang, Yong-Ku ; Kwak, Jae-Ha ; Kim, Youn-Soo ;
Journal of the Korean Association of Geographic Information Studies, volume 4, issue 4, 2001, Pages 61~71
In these days, surveying instruments are developing rapidly and the precision is improving continuously. The reappearance of three dimensional terrains of a great precision are possible and the calculation of the area or the volume has a high precision due to the development of the technique of the spatial information system using computer. But actually, in construction site they calculate two-dimensional area using the traditional method, plane table surveying, planimeter, and then get ground surface area through timing the slope correction factor. In this study, I show the defect and inefficiency of the calculation of the area by the traditional methods and survey the area with Electronic Distance Measuring equipment and GPS instrument. With these data, we made the three dimensional terrain model and calculated two-dimensional area and ground surface area. After that, I compared areas that calculated by algorithm method of irregular triangle and analysis of grid method with standardizing the area that calculated by the traditional method. Finally, I suggested more effective and precise method in calculating ground surface area.
Extraction Method of Damaged Area by Pinetree Pest(Bursaphelenchus Xylophilus) using High Resolution IKONOS Image
Jo, Myung-Hee ; Kim, Joon-Bum ; Oh, Jeong-Soo ; Lee, Kwang-Jae ;
Journal of the Korean Association of Geographic Information Studies, volume 4, issue 4, 2001, Pages 72~78
In this study, high spatial resolution of IKONOS 1m image and Red(0.63~0.69) band, NIR(0.76~0.90) band in 4m image, which are the same wavelength range as Landsat TM band 3, 4, were used for extraction of the front areas of B. Xylophilus in Geuje island where is located in southern part of Korea. Moreover, since they have higher spatial resolutions than Landsat TM, they have been used for lots of studies in the field of forest and vegetation. In the results, it was validated by GPS field survey, spectral histogram analysis of IKONOS NIR band was significant available method for extracting the front areas of B. Xylophilus. In this study, 15 points were verified as real damaged trees of 22 sample points extracted from GPS field survey. This study was not only extracted the damaged trees by B. Xylophilus but also suggested the possibility of using IKONOS images for the study on the forest damages by any disease and insect pests.