• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.325-327
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• 2003

Forest biomass is the basis of forest ecosystem. With the rapid development of remote sensing and computer technology, forest biomass estimation using remote sensing data is paid great attention and has acquired great achievements. This article focuses on discussion of methods of forest biomass estimation methods using Terra/MODIS data in Northeast China. The research include: combining the MODIS time series parameters with seasonal characteristics of forest species to identify major forest species; establishing a model to estimate forest biomass based on forest species; analyzing the effects of the existent forest biomass and increasing biomass on terrestrial carbon cycle. This research can help to make clear the mechanism of carbon cycle.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2003.11a
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• pp.3-8
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• 2003

Census data are usually provided at an aggregated level. However, the aggregated data are essentially arbitrary geographical areas. The areal units used to report census data have no natural or meaningful geographical identity. Unfortunately, this means that analyses of these area aggregations may be conditional upon the set of zones, which are presented. This effect is known as the modifiable areal unit problem (MAUP) and has two related aspects. First, scale effect is the variation in numerical results that occurs due to the number of zones used in an analysis. Second, results may also differ between different ways of aggregating exactly the same data to the same scale; this may be called the aggregation effect (Openshaw, 1984). This study aims to provide a practical tool for the study of MAUP. I have created a set of 91 areal units based on 280 basic units in Nonhyun-2 dong to solve zoning problem and scale problem. We can easily recognize the importance of areal classification as statistics were different according to areal classification.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2004.11a
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• pp.445-450
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• 2004

Due to rapid development of If, difference types of services and platforms are being developed increasingly. With the emerging mobile technologies, Geographic Information System (GIS) is also getting more attention recently. But it is known to have some limitations in being served in different types of mobile devices and platforms. While information services are limited by data format and data exchange between platforms, the extensible Markup Language (XML) is getting focused as the most promising technology as the solution to such problem. Geographic Markup Language (GML) is based on XML technology and is being frequently mentioned recently as the solution to service problem on different mobile devices as well as the internet. In this study, we suggested the framework to use the GML in order to transfer and represent geographical data through the on-line or wireless platforms. We compared different application types which are currently used with GML and proposed to improve GIS services using the GML in geographical data transfer and description.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.322-324
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• 2003

Leaf C:N ratio is a new factor in the field of biochemical inversion with hyperspectral data. Effects of common-used spectral transformations including log(R), log(1/R), 1/R, etc. from 400nm to 2490nm on its inversion are compared. Results show that their effects on statistical modeling are not apparent. Continuum removal is used on original reflectance in the range of 2030nm to 2220nm, in which exists an apparent absorption peak due to cellulose, lignin, protein, etc. The effect is distinctive and tends to improve the precision of C:N ratio inversion. Further, it is a robust and physically based transformation.

• Journal of the Korean Association of Geographic Information Studies
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• v.10 no.4
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• pp.35-45
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• 2007

Currently, the necessity of inter-system integration and sharing system increases to additionally construct and efficiently utilize the geographical information data in accordance with the increase in demand for geographical information. The provision of the data within the domestic sharing system is led by the tasks within national geographical information distribution network or intra-local governmental combined system. However, any voluntary geographical information sharing cooperation body is increasingly required with the increase in necessity of administrative cooperation among neighboring metropolitan areas, including space planning and development. Accordingly, this study is aimed at looking into the constitutions and roles of cooperation bodies within metropolitan areas by the composition, distribution, update and management of data with special regard to overseas advanced cases whose sharing systems and their effects are highly evaluated, and at presenting any model of the domestic future voluntary sharing cooperation organization within metropolitan area.

• Journal of Environmental Impact Assessment
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• v.2 no.2
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• pp.73-83
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• 1993

Increasing concern for the environment in Korea has led to the demand that major policies and large-scale development projects be subjected to detailed impact assessment. This paper reports on the state of data related to the prediction of the environmental impact (EIA) to emphasize the importance of data quality. Environmental impact statements (EIS) consulted with the Ministry of Environment of Korea were analyzed from 1981 through 1992. Many of assessors used existing data and collected supplementary data from field survey. Most of the results of EIA are presented directly or summarized on maps and as graphics. For the national purpose, large source of quality-controlled data such as atmospheric data have been developed, However, there are the deficiency in data to analyze the impact of human activity, and data gaps and incompatibilities among systems. Consequently, the development of data bank systems including computer database and remotely-sensed satellite data is required to improve the quality of data which are relevant to EIA. The data bank system should be organized meaningfully in minimum time with a least cost, and measurement standards must be made explicit. Geographical information systems (GIS) are applicable to the graphic presentation or to the impact prediction model.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.2 no.1
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• pp.211-235
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• 1974

A. The principal geographical descriptions compiled by the government during Yi dynasty started from the Shinchan-Paldo-Chiriji(新撰八道地理志) which was compiled by the royal decree in the sixth year (1424) of King Sejong(世宗) and it ended in the Jungbo-Munhonbiko(增補文獻備考) which was published in the second year(1908) of Yunghyi(隆熙). The process of their compilations can be divided into four steps according to the compilatory work's contents of the principal geographical descriptions which were compiled through the Yi dynasty. We can say that the first step (1424-1454) of those works began at the date of the compilation of the Shinchan-Paldochiriji and it ended in the date of the compilation of the "Sejongsilok-Chiriji"(世宗實錄地理志), and during that period the Kyonsangdo-Chiriji(慶尙道地理志) was published. In the second step(1455-1531), were published the Paldochiriji,(八道地理志), Kyongsangdosokchanchiriji(慶尙道續撰地理志), DonggukYojisungnam(東國與地勝覽) and the third step (1532-1769) began at the date of the compilation of the Dongguk-Munhonbiko(東國文獻備考) and it ended in the date of the publication of the Jungbo-Munhonbiko(東國文獻備考), and in that period the Jongjung-Munhonbiko(訂增文獻備考) was published. The works of compilation of the Eubjis in the period of King Kojong(高宗) came within the category of the fourth step. B. Generally speaking, the state geographical descriptions were composed of the regional data of the country which were collected and arranged. In other words, firstly, the Eubjis were compiled in each county, secondly, the Dojis(道誌) were compiled based upon the collections of all the Kunjis(郡誌), lastly, the government collected all the Dojis and compiled them into the state geographical descriptions. The Eubjis in the early days of Yi dynasty were compiled as the data for the compilation of the nation-wide geographical descriptions, but the Eubjis in the age of King Kojong were compiled as the administrative data. C. The main contents of the Eubjis were composed of the descriptions on the geography, history, industry, naval and military affairs, traffics, communication, administration, economy and society, and of the matters on the prose and poetry, persons of loyalty, historic remains, social customs and schools. Consequently, the above-mentioned data will be contributed to the study on the structures of the geography, history, economy, administration, education, naval and military affairs and traffics as well as the study on the literature, social customs and bibliography. Especially, they will be important data for the arrangement of cultural assets of our country. Furthermore, because the traditional study of national literature was centered around the study on the central government ignoring the study on the regional matters, the study of the Eubjis will be worthy of being valued.

• Journal of Preventive Medicine and Public Health
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• v.38 no.2
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• pp.147-153
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• 2005

Objectives: Studies on the geographical differences in mortality tend to use a census population, rather than a registration population, as the denominator of mortality rates in South Korea. However, an administratively determined registration population would be the logical denominator, as the geographical areas for death certificates (numerator) have been determined by the administratively registered residence of the deceased, rather than the actual residence at the time of death. The purpose of this study was to examine the differences in the total number of a district population, and the associated district-specific mortality indicators, when two different measures as a population denominator (census and registration) were used. Methods: Population denominators were obtained from census and registration population data, and the numbers of deaths (numerators) were calculated from raw death certificate data. Sex- and 5-year age-specific numbers for the populations and deaths were used to compute sex- and age-standardized mortality rates (by direct standardization methods) and standardized mortality ratios (by indirect standardization methods). Bland-Altman tests were used to compare district populations and district-specific mortality indicators according to the two different population denominators. Results : In 1995, 9 of 232 (3.9%) districts were not included in the 95% confidence interval (CI) of the population differences. A total of 8 (3.4%) among 234 districts had large differences between their census and registration populations in 2000, which exceeded the 95% CI of the population differences. Most districts (13 of 17) exceeding the 95% CI were rural. The results of the sex- and age-standardized mortality rates showed 15 (6.5%) and 16 (6.8%) districts in 1995 and 2000, respectively, were not included in the 95% CI of the differences in their rates. In addition, the differences in the standardized mortality ratios using the two different population denominators were significantly greater among 14 districts in 1995 and 11 districts in 2002 than the 95% CI. Geographical variations in the mortality indicators, using a registration population, were greater than when using a census population. Conclusion: The use of census population denominators may provide biased geographical mortality indicators. The geographical mortality rates when using registration population denominators are logical, but do not necessarily represent the exact mortality rate of a certain district. The removal of districts with large differences between their census and registration populations or associated mortality indicators should be considered to monitor geographical mortality rates in South Korea.

• Journal of the Korean Geographical Society
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• v.8
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• pp.24-36
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• 1973

도시에 관한 제문제를 연구하기 시작한 것은 그다지 오래되지 않다. 더우기 도시생태에 관한 연구는 더욱 그러하다. 이처럼 역사는 짧지만, 도시생태에 관한 연구는 장족의 발전을 이룩해 왔는데 그 원인은 컴퓨터의 개발이다. 컴퓨터는 과거 10년간 사회과학은 물론 자연과학분야에 까지 널리 활용되어 과학발전에 큰 공헌을 하고 있다. 특히 컴퓨터의 자료처리 능력은 우리의 상상을 초월한다. 예를 들면 도시지리에서는 컴퓨터가 자료분석 뿐만아니라, 나타난 결과를 지도화할 수 있는 능력도 가지고 있다. 본 몬문은 서울과 대구 - 대구의 경우 두 종류의 data를 썼다.- 지역을 컴퓨터에 의해서 생태요인을 분석하여 나타난 결과를 지도화한 것이다.

• Proceedings of the Korean Statistical Society Conference
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• 2003.10a
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• pp.27-29
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• 2003

정보화시대의 발전과 더불어 우리 일상생활에 친숙하게 다가온 기술 중의 하나가 지리정보시스템(Geographical Information System: GIS)이다. GIS는 공간(지표, 지하, 해양 등)상에 분포하고 있는 정보에 대해 여러 종류의 세밀한 지도를 이용하여 효율적으로 사용자에게 제공하여 관리하는 종합정보기술이다. 통계 데이터 중에는 지리정보를 가지고 있는 경우가 상당히 많다. 하지만 지리정보를 갖는 통계 데이터의 탐색적 자료분석(Exploratory Data Analysis)을 위한 Visualization 기법에 대해서는 별로 연구된 바가 없다. 본 논문에서는 GIS를 위한 벡터맵(vector map)의 간단한 제작방법과 GIS의 개발방법, 그리고 탐색적 자료분석을 위한 Visualization기법을 소개한다.