GIS 를 이용한 거제도 지형 및 하계 분석

김우관(Woo Kwan Kim),임용호(Yong Ho Lim) 한국지역지리학회 1997 한국지역지리학회지 Vol.3 No.2

본 연구는 최근 지리학에서 많이 이용되고 있는 GIS를 지형분석에 적응하기 위하여 한반도의 남해안에 위치하는 거제도를 대상으로 지형 및 하계망의 특성 및 지질과 지형, 지질과 하계망, 지형과 하계망과의 관련성을 GIS를 이용하여 분석한 것으로 상용 Data인 DTED와 지형도상의 Data를 같이 사용하고 이를 비교하여 봄으로써 장차 지형분석에 GIS의 이용 가능성과 DTED를 이용한 지형 및 하계분석의 가능성을 평가하고자 한다. 거제도의 자연 환경을 지형도 Data와 DTED를 이용 GIS Tool로 분석하여 그 결과를 비교한 결과 GIS Tool로 지형분석에는 문제가 없었으나 GIS자체가 지형분석을 위해 만들어진 Tool이 아니기 때문에 방법상의 문제가 제기되었다. 또한 지형도상의 Data와 DTED의 분석결과를 비교한 결과 DTED가 지형도 Data에 비해 정밀도가 떨어지고 좌표상의 오차가 발생하였다. 이러한 문제가 있기는 하나 접근이 불가능한 지역이나 넓은 지역을 대상으로 한 분석에서는 DTED가 유용한 자료로 사용될 수 있다. The purpose of this study is to find out the characteristics of landform in Geoje-Do using GIS and DTED data. The characteristics of landform in Geoje-Do are as follows: First, the height-range of Geoje-Do is 0∼580m, and the average elevation of it is 124m. Volcanic and granite region is mainly appeared at high elevation-region. But, we can`t find out outstanding difference of elevation, according to its geology. The second, the slope-range of Geoje-Do is 0∼52 degree, and the average slope of it is 17.6 degree. The slope of volcanic and granite area is more steeper than any other region. But the results of analysis of the geology in Geojo-Do, don`t show outstanding difference of the slope. The third, the area-rate of the aspect of Geoje-Do is almost same in all direction. And the area-rate of south-west direction is the highest. According to the geology of Geoje-Do, granite is distributed the most widely, and the area of volcanic and granite occupy 60% of entire island`s area. According to analysis of influence of geology with elevation, geology has little relationship with elevation. According to analysis of geology and drainage network, streams are inclined to be developed well in Alluvium area. Drainage network is well developed throughout the entire island, except southeast area. The highest order of stream is 4 in 1:25,000 topographic map. The density of stream in Geoje-Do is very high, such as 1.6. The bifurcation-ratio of stream is also higher than 4 in all order. The length-ratio of stream is ranged from 1.24 to 3.25. According to the relationship between order and elevation, order is the greater, elevation is the lower. According to the relationship between order and slope, order is the greater, slope is the gentler. In this study, we use DTED Data, and compare it with topographic map data. According to the comparison, there is a little difference between DTED data and topographic map data. Therefore, to use DTED data in landform analysis, it is required coordinate matching process. This process is very important, and take very long time. Thus, if you use DTED in landform analysis, some processes are required. DTED data can be taken very easily, but its using is not simple. Because coordinate adjust is very hard work.

위성영상을 이용한 토지이용 변화 검색기법 비교연구

박순호(Soon Ho Park),김우관(Woo Kwan Kim) 한국지역지리학회 1999 한국지역지리학회지 Vol.5 No.1

우리나라에서 위성자료를 이용한 토지이용에 관한 연구는 현황분석이 중심이고, 토지이용 변화에 관한 연구는 분석기법에 대한 적실성 평가 없이 특정기법이 적용되어 왔다. 본 연구는 도시지역의 토지이용 변화 검색에 많이 활용되고 있는 다섯 가지 토지이용 변화 검색기법을 선정하여 대구광역시 북구를 사례로 각 검색기법의 정확도를 비교·분석하였다. 핵심데이터는 1994년과 1997년에 촬영한 Landsat TM영상과 항공사진이다. 위성자료를 이용한 토지이용 변화검색에는 pre-classification comparison method가 post-classification comparison method보다 효과적이었다. Pre-classification comparison methods 중에서는 image differencing method가, 특히 임계치 1.0에서의 image differencing method의 DIF2 변화이미지의 경우가 가장 정확도가 높게 나타났다. Five land use change detection methods were applied to 1994 and 1997 Landsat Thematic Mapper (TM) images of Pook-Gu, Taegu city to determine the land-cover changes between the two dates. The two images were coregistred to UTM coordinates. A post-classification comparison method was the most commonly used quantitative method of change detection. A pre-classification comparison method was more effective method to change detection of land cover than a post-classification comparison method. Two indices were used to assess the accuracies of the studied methods. A image differencing method was found to be most accurate for detecting change verse no change among five land use change detection methods. The difference image of band 2 was found to be most accurate. The overall accuracy and Kappa index agreement of the difference image of band 2 were 0.810 and 0.447.

濟州島 寄生火山의 斜面形態

金又寬,田迎權 경북대학교 문리과대학 지리학회 1987 地理學論究 Vol.- No.8

Cheju Island is situated to the south of the Korean Peninsula at the geographical location between longitude E126˚9'45" to 126˚58'22" and latitude N33。11'30" to 33˚33'47". The island, a volcanic one, was formed from the end of Tertinary period to the Quaternary period. Geology is composed of basalt, trachyte, trachytic andesite, andesite and sedimentary rocks. (Especially, the basalt is most widely distributed.) There are more 400 parasitic cones in the island. These parasitic cones are topographically distinctive features of the island and these are the object of this study. The study analysed the form grouping of 312 parasitic cones manysidely that can be easily found on topographical map(1:25,000). Also, the study made profile of 279 parasitic cones and classified the profiles into 4-types(Aspite type, Konide type, Tholoide type, Crater type). Main findings are as follows: 1. X-type(the type without crater on the top of volcanic edifice) and U-type(the type with open crater's direction) of crater types are occupied about 77%. This shows that the patterns of eruption are generally simple. 2. Most of the parasitic cones are composed of cinder. The mean slope angle is about 17˚, the slope angle between 11˚, and 30˚ is occupied 88%. 3. The mean height of the parasitic cones is 55m, the height under 100m is occupied 88%. 4. The open crater's direction of U-type is considered to have been influenced by the surface slope rather than by the prevailing wind, because the open crater's directions on the north slope are predominant to the north, but those on the south slope are more or less to the south. 5. There are a little correlation between the height and the slope angle. This shows that the slope angle of volcanic edifice are influenced by the constituent materials, the patterns of eruption, and the energy of eruption. 6. Most of the profile of the parasitic cones are konide type. The types of profile are determined by the constituent materials, the degree of erosion, and being or not-being of eruption.

北漢江流域의 河系網 分析

金又寬,尹仁赫 경북대학교 사회과학대학 1983 社會科學 Vol.2 No.-

This study attempts to analyze the drainage system of the Buk-Han River basin with the purpose of examing the characteristics and presenting the data for systematizing rivers in Korea. The Drainage system is analyzed according to Bifurcation ratio and Length ratio. The research is based upon analysis of 1 : 250,000 topographical map coverage. The results are as follows: (1) The main stream is found to be 6th order. The Bifurcation ratio (N_1/N_2) is determined to be 4.1 and the Length ratio(L_2/L_1), 1.18. (2) Correlation between order and number which is plotted on the semilog paper shows characteristics of natural stream systems. (3) Correlation between order and length expresses that the junction of the 5th order leans to the lower stream.(4) The average drainage density of Buk-Han River Basin is 381m/㎢.

氣候地形學의 硏究動向 : Pediment와 周氷河地形을 中心으로 mainly about pediment and periglacial landform

金又寬,田迎權 경북대학교 문리과대학 지리학회 1988 地理學論究 Vol.- No.9

The main purpose of this paper is to review the previous research trend on climatic topography based on climatic change in the inside and outside of the country. The results are as follows. 1. In the researches on cause and period of pediment formation, the findings of researchers are incongruous. So, the criterion to classify among pediment, alluvial fan, terrace should be established. 2. It is found that researchers have different opinions to define respectively patterned ground and block stream in the research trend of periglacial landform. Especially, researchers have different underpinnings to interprete the charateristics among block stream, block field, talus. Therefore the objective criterion of classifying these landforms should be prepared. 3. For the future study on the field of climatic geomorphology, the scientific analysis of climatic environment at the time of landform formation (climatic change in the quaternary period) should be accomplished.