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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Association of Geographic Information Studies
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Journal DOI :
The Korean Association of Geographic Information Studies
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Volume & Issues
Volume 8, Issue 4 - Dec 2005
Volume 8, Issue 3 - Sep 2005
Volume 8, Issue 2 - Jun 2005
Volume 8, Issue 1 - Mar 2005
Selecting the target year
Estimation of Potential Evapotranspiration using LAI
Kim, Joo-Hun ; Kim, Kyung-Tak ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 1~13
In the process of a hydrology circulation, evapotranspiration is considered a very important factor to build a plan for the development of water resources and to operate water resources system. This study purposes to estimate daily potential evapotranspiration quantity in consideration of energy factors of the surface by using spatial information such as Landsat TM (ETM+) data, DEM and Landcover. Kyounan-cheon, Han River is selected as a target area, and landcover is divided by vegetation and non-vegetation covered area. Penman-Monteith equation which considers leaf-area index is used to estimate potential evapotranspiration quantity of vegetation covered area. The combination method (energy burget and aerodynamic method) is used in non-vegetation covered area. Among the input data for estimating potential evapotranspiration, NDVI, SR and Albedo is formed by Landsat, TM and ETM+ from 1986 through 2002. ground heat flux is estimated by using NDVI distribution map, LAI distribution map is drawn by using SR distribution map. The result of estimation shows that the average potential evapotranspiration in the whole basin is about 1.8-3.2mm/day per each cell. THe results of estimating potential evapotranspiration quantity by each landcover are as follows; water surface 3.6-4.9mm/day, city 1.4-3.1mm/day, bareland 1.4-3.5mm/day, grassland 1.7-3.7mm/day, forest 1.7-3.0mm/day and farmland 1.8-3.6mm/day. The potential evapotranspiration quantity is underestimated in comparison with observed evaporation data by evaporation pan, but it is considered that it has physical propriety.
Region Matching of Satellite Images based on Wavelet Transformation
Park, Jeong-Ho ; Cho, Seong-Ik ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 14~23
This paper proposes a method for matching two different images, especially satellite images. In the general image matching fields, when an image is compared to other image, they may have different properties on the size, contents, brightness, etc. If there is no noise in each image, in other words, they have identical pixel level and unchanged edges, the image matching method will be simple comparison between two images with pixel by pixel. However, in many applications, most of images to be matched should have much different properties. This paper proposes an efficient method for matching satellite images. This method is to match a raw satellite image with GCP chips. From this we can make a geometrically corrected image. The proposed method is based on wavelet transformation, not required any pre-processing such as histogram equalization, analysis of raw image like the traditional methods.
Estimation of Support Working Expenses for Dam Area using GIS Spatial Analysis
Hwang, Eui-Ho ; Lee, Geun-Sang ; Chae, Hyuo-Suck ; Koh, Deuk-Koo ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 24~32
Budget distribution system suporting dam area was changed largely in 2005, and thus, population survey and area calculation for dam and needed to be performed based upon the new criteria. According to the former regulations, dam area was confined to inside of 5km from the H.W.L-line. However, new regulations divide it into two categories : inside and outside of catchment area within 2km from the H. W. L-line and those belong to 2~5km from the same line. In this study, topography, DEM, TIN and Hydrological Unit Map were build for the analysis of the Namgang Dam area. It shows that analysis of dam area using GIS methods produces a good results to be used for rational distribution of budget.
A Study on the Diluted Water from the Yangtze River in the East China Sea using Satellite Data
Yoon, Hong-Joo ; Cho, Han-Keun ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 33~43
China Coastal Waters(CCW) usually appeared from June through October every years, and it appeared very strong in August. In the harmonic analysis for Sea level anomaly (SLA), the annual amplitude of the eastern part (8~9.5cm) in Jeju Island was lower than those of the western part (over 13cm). In the harmonic analysis for Sea Surface Temperature (SST), the annual amplitude of the eastern part(
) in Jeju Island was lower than those of the western part(
). For the Power Spectrum Density (PSD), SLA and SST remarkablely peaked on the annual period, semi-annual period and 3-monthly period. In summer and autumn, SLA of 1996 to 1999 was high in comparison to other years, and then it should be considered that the appearance of CCW was closely related to heavy rainfalls. The path of CCW formed this boundary of temperature between the yellow sea and the east china sea.
Extraction of Horizontal Alignment Information using RC Helicopter Photogrammetric System
Jang, Ho-Sik ; Roh, Tae-Ho ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 44~51
In this study, the method of extracting road centerline's coordinate and road facilities is presented using RC helicopter photogrammetry system. From the survey of extracted road centerline, the errors turned out to be -0.117m ~ 0.103m on the X-axis and -0.014m ~ 0.009m on the Y-axis when RC Helicopter photogrammetry system utilized. By application of this system, hereafter, not only management of road facilities but also construction of DB would be enable which need positioning and design of alignment on the access is not easy area such as traffic congestion or toparchy area.
A Study on the Correlativity Between Land Price and Residental Environment Elements - Focusing on the Haeundae-Gu and Suyoung-Gu in Busan City -
Kim, Ga-Ya ; Chung, Chang-Sik ; Ryu, Jae-Hong ; Kim, Jeong-Ho ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 52~60
This paper attempted to investigate not only the correlativity of land price and residential environment elements but also the effect that the residential environment elements influence on the land price, focusing on the Suyoung-Gu and Haeundae-Gu which are representative residential and waterfront area in Pusan. For this purpose, regression analysis and correlation analysis as the residential environment elements in independent variable and the land price in dependent variable were carried out. First of all, from the correlation analysis between the land price and the residential environment elements, it become clear that the variables such as the land use, the distance to arterial road and, the distance to subway station have high correlativity with land price in all the research area. Then from the individual power of explanation and accumulative power of explanation of the each variable to the land price through the regression analysis, it was become clear that 7 variables which are the land use, the distance to trunk road, the distance to subway station etc. have 67% of the power of explanation to land price at the Suyoung-Gu, and 50.5% at the Haeundae-Gu. Moreover, researchers had an special interest in the correlativity between the distance to the coastal line and land price as well as the power of explanation of the distance to the coastal line for the land price. It means that researchers expected the variable of the distance to the coastal line have a strong correlativity and high power of explanation for land price. However, from the regression analysis and correlation analysis, it was become clear that the variable of the distance to the coastal line have a weak correlativity, and low power of explanation which is just form 6.4% to 7.6% in all the research area. In other words, it might be said that the variable of the distance to the coastal line is not so important one to presume the land price.
Extracting Ground Information from Airborne Laser Scanning Data based on Mean Filtering Method
Choi, Yun-Woong ; Lee, Geun-Sang ; Chae, Hyo-Sok ; Cho, Gi-Sung ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 61~70
Airborne laser scanning system needs preprocessing which removes some objects such as buildings from the raw DSM data to construct DEM in building area because the laser pulse can't penetrate into the buildings. This study applied the mean filtering method which has various size filter to the DSM data constructed by airborne laser scanning system and decided the optimal filter size as
by analyzing the standard deviation change ratio. Also, this study could get the
standard error by comparing the optimal filtering DEM and DSM raw data of airborne laser scanning. Therefore, it could know that the mean filtering method, which is presented in this study, is very effective to extract DEM in the urban area which has a low relief.
Mapping Inundation Areas by Flash Flood and Developing Rainfall Standards for Evacuation in Urban Settings
Shin, Sang-Young ; Yeo, Chang-Geon ; Baek, Chang-Hyun ; Kim, Yoon-Jong ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 71~80
As local flash flood exceeding planned capacity occurs frequently, localized preparedness and response to flood inundation are increasingly important. Using XP-SWMM model and GIS techniques, this study analyzes inundation areas by local flash flood and develops rainfall standards for evacuation with the case of Sadang-Cheon area, a local stream and its nearby highly populated watershed in the southern part of metropolitan Seoul, Flood inundation areas overflowed from drainage systems are analyzed and mapped by amount of rainfall that is derived from reference levels of stream flow. Rainfall standards for evacuation are comprised of 'watch' (40mm/hr) in preparing for near-future inundation and 'evacuation' (65mm/hr) in responding to realized inundation. The methods suggested by this case study may be applied to other urban areas for sound flood prevention policy measures and thus risk minimization.
Development of a Landslide Hazard Prediction Model using GIS
Lee, Seung-Kii ; Lee, Byung-Doo ; Chung, Joo-Sang ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 81~90
Based on the landslide hazard scoring system of Korea Forest Research Institute, a GIS model for predicting landslide hazards was developed. The risk of landslide hazards was analyzed as the function of 7 environmental site factors for the terrain, vegetation, and geological characteristics of the corresponding forest stand sites. Among the environmental factors, slope distance, relative height and shapes of slopes were interpreted using the forestland slope interpretation module developed by Chung et al. (2002). The program consists of three modules for managing spatial data, analyzing landslide hazard and report-writing, A performance test of the model showed that 72% of the total landslides in Youngin-Ansung landslides area took place in the highly vulnerable zones of grade 1 or 2 of the landslide hazard scoring map.
Examination of the Algorithms for Removing Sink and Flat Area of DEM
Kim, Kyung-Tak ; Choi, Yun-Seok ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 91~101
To determine stream network and watershed boundary using DEM, it is necessary to remove sink and flat area in proper way. There are filling algorithm and breaching algorithm to remove sink and Jenson and Domingue algorithm, relief algorithm and combined gradient algorithm to determine flow direction in flat area. In this study, the algorithms are reviewed. The computer program which uses filling algorithm with breaching algorithm and combined gradient algorithm to remove errors in DEM is developed. The results from this program are compared with Arc/Info which uses filling algorithm and Jenson and Domingue algorithm. The characteristics of stream network extracted from the DEM are analyzed. They are compared with the stream from NGIS map for stream morphology and characters by stream order to examine the value of this study.
The Structural and Functional Analysis of Landscape Changes in Daegu Metropolitan Sphere using Landscape Indices & Ecosystem Service Value
Choi, Won-Young ; Jung, Sung-Gwan ; Oh, Jeong-Hak ; You, Ju-Han ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 102~113
Ecosystem is composed of human, biotic and abiotic environment. Landscape is an ecosystem which appear in a unit region. These landscape are the spatiotemporal land mosaic which is combined with various landscape elements. And, land use and land cover changes are important factors of landscape structure changes. This study is mainly focused on the analysing the spatiotemporal change patterns of Daegu metropolitan sphere forest landscape, using landscape indices and Ecosystem Service Value (ESV) which quantify ecosystem structures and functions. The results of this study are as follow: The encroachment and fragmentation of forest were due to linear developments, i. e. road construction, rather than large-scale developments such as residental lands or industrial complexes. And, the core area percentages of landscape gradually decreased and these could possibly deteriorate the soundness of forest areas by reducing the core areas which are habitats of species. In addition, there was intimate relations between ESV and forest landscape area. The results of this study can be detached standards for impartial judgements between the logic of development & conservation, and basic standards for the establishment of development plans, i. e. metropolitan-plans, which are adequately reflected ecosystem value.
A Study on Landscape Characteristics of Odesan National Park by using GIS and RS
Han, Gab-Soo ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 114~122
The purpose of this study was to analyze the landscape characteristics by making DEM, land use map, and the land cover map on the Odesan national park, and to suggest the method of visual management through the visibility analysis. In the change of land use district, the natural environment district decreased, the natural preservation district extended relatively. It means that the tendency of preservation was strengthened. However, the development possibility has increased by increase as for the area of the village district. In the land cover change, it appeared agriculture area and city area increase in the natural environmental district. The most area where visible frequency appeared highly belonged to the natural preservation district and forest region. However some areas belonged to the natural environmental area, and continuous landscape management was required.
Analysis of Precision According to Converging Angle in Close-Range Digital Photogrammetry
Seo, Dong-Ju ; Kim, Jin-Su ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 123~133
This study has made photographing respectively by changing the converging angle by use of d7
that is a measurement digital camera. And also in order to minimize the errors happened at the relative orientation, we have sorted out the round target that the relative orientation is automatically on the programming and have calculated RMSE by carrying out the bundle adjustment. We think that such a study could be used as very important basic data necessary in deriving the optimal photographic conditions by the close-range digital photogrammetry and in judging such a degree.
Assembling Geographic Information with SPOT-5 Satellite Imagery : A Case Study on North Korea
Sakong, Ho-Sang ; Park, Jin-Hyeong ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 134~142
In building geographic information for North Korea, we proposed the method of using SPOT-5 image, designed geographic information layers, and inspected the location accuracy. Basically this study is similar to existing method in which uses GCPs to build geographic information from SPOT-5 satellite imagery. However, this study adopted a different method of GCP acquisition. The GCP used in this study is a triangulation point which was made at Japanese imperialism eras. The location accuracy error was 8.755 meters horizontally, which satisfied the tolerance of 17.5 meters in the 1:25,000 scale public survey guidance. In conclusion, we suggest that geographic information for North Korea can be built from SPOT-5 images with the triangulation point made in Japanese imperialism times.
Design of ULID-based Location-Sensing Service Model
Nam, Kwang-Woo ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 143~154
This paper proposes the location acquisition methods and LBS(location-based services) system using RFID(radio frequency identification) tags with location information in ubiquitous city. Location information is checked using RFID tags attached to various buildings. stores and road signs. And various LBSs are provided based on the location information. Traditionally, when the location information is obtained by a GPS, the precision of the location information may deteriorate due to geographical displacement of a satellite and GPS receivers, for example shadow zone by building, in-door environment, and heavy cloud. The objective of this paper is to provide a ULID(universal location identification) data structure, a ULID-based location acquisition method and an LBS system, in which precise location information is extracted using RFID tags attached to various buildings, stores and road signs and ULID and also danger of information leakage is minimized so that an LBS of ubiquitous environment can be provided to a user.
Developing Coast Vulnerable Area Information Management System using Web GIS
Pak, Hyeon-Cheol ; Kim, Hyoung-Sub ; Jo, Myung-Hee ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 155~164
The coast has been known as very vulnerable area. This area has nature disasters such as typhoon, tidal wave, flood and storm almost every year. In this study, coast vulnerable area information management system was developed to manage the coastal facilities and vulnerable area through Web GIS. This system is able to visualize the damage area and support the official work related to coast as efficient DSS(Decision Supporting System). Moreover, the foundation for domestic coast information management is expected by acquiring less cost and time. For this, GIS DB was first constructed by acquiring damage factor data such as typhoon, tidal wave, flood and storm. Then GIS analysis methods and high resolution satellite images are used to possibly present the results of retrieve as table, map, graph, inundation simulation in real time.
Preliminary Research on Prediction of Pottery Site Distribution based on Overlay Analysis Method of Geographic Information System
Lee, Jin-Young ; Park, Jun-Bum ; Yang, Dong-Yun ; Kim, Ju-Young ; Hong, Sei-Sun ; Jeong, Kye-Ok ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 165~175
Geographic Information System(GIS) is useful to preserve cultural heritage and land use management using both spatial information management technique and spatial analysis function in cultural heritage management. The purpose of this study is to build a database of pottery and kiln sites in South Korea, to analyze site locations and finally to make prediction model. The locations of 1,200 sites are put into GIS database. Such factor elevation, slope angle, aspect, horizontal/vertical distance from the nearest water are analyzed. Each factor was statistically analyzed on GIS and represented to rank 1-5. Pottery/kiln can be predicted by the spatial analysis function in overlay methods. As a result of this study, preliminary application of prediction model shows that the high potential area is between the slope and alluvial plain. Field survey in the Sungbuk-dong in Daejeon city supports the preliminary result. More data can make improve efficient prediction model in unknown areas.
A Study of the GIS Education in the Geography Education : In the Case of USA
Kim, Chang-Hwan ;
Journal of the Korean Association of Geographic Information Studies, volume 8, issue 4, 2005, Pages 176~190
The purpose of this paper is to examine trends of the GIS education in the school's education of the USA, especially the geography education, which the application of GIS is activated in the life. In addition, in this paper are explored possibilities of GIS education in the geographical education of Korea throughout the consideration of the USA case. There are some backgrounds of the activation of GIS education in the USA, They can be characterized as (1) the achievement of the validity between the geographical importance in the realm of the national policy and GIS education, (2) offering standard indications for GIS education and gradually minimizing school teachers' work-loads, (3)the establishment of the network of GIS stake-holders and their cooperation, (4) the attraction of school students through case study-centered education, and (5) the share of GIS education-related information. These shall be considered to introduce actively GIS education into the geography education in Korea.