Journal of the Korean Geographical Society (대한지리학회지)

The Korean Geographical Society (대한지리학회)
권호 표지

Constructing Area Cartogram Using a GIS Based Circular Cartogram Technique

GIS 기반 원형 카토그램 기법을 이용한 카토그램 제작 방법 연구

  • Kim, Young-Hoon (Department of Geography Education, Korea National University of Education)
  • 김영훈 (한국교원대학교 지리교육학과)
  • Published : 2008.06.30
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Abstract

Many cartographers have for many years searched for a way to construct cartograms in which the sizes of geographic areas such as states, counties or census tracts are reseated in proportion to their population or some other socio-economic properties. While many techniques and algorithms for creating cartograms have been proposed, some of them are still extremely complex to generate in a proper manner, and many of them suffer either from this lack of readability or from seamless integration with GIS software. This paper, therefore, presents a simple population cartogam technique based on the Circular Cartogram Algorithm(CCA) by Dorling(1996) to tackle these drawbacks by drawing the areas as simple circles for use as a base map and linking the construction with GIS mapping processes. For an automated approach in the cartogram generation, this paper proposes a close coupling method of ArcView GIS 3.3. package in order for users to access to the cartopam algorithm. Then, they will be available through an interface that the ArcView GIS system allows user-written routines to be accessed easily. The CCA and its coupling architecture ensure to improve the potential applicability of the use of cartograms to census mapping at practical levels. As the cartogram examples, cartograms of population and property types in 2005 Korea census data sets are illustrated in the end, by which viewers can easily identify the residential concentration and their relative ratio in Seoul metropolitan area.

지리정보시스템(Geographic Information System, GIS) 활용이 확대됨에 따라서 다양하고 복잡한 사회경제적 변수의 시각적 전달은 공간 분석과 더불어 중요한 연구 주제라고 할 수 있다. 그러나 시각화 기술 자체의 복잡성과 GIS와의 연계성 부족으로 인해 지도화 및 시각화 기법이 제공하는 여러 장점들이 제대로 전달되고 있지 못하고 있다. 이에 대하여 본 연구에서는 카토그램(cartogram) 기법을 적용하여 다양한 인구 관련 변수의 공간적 관계를 효과적으로 지도화할 수 있는 방법을 논의하고자 한다. 이를 위하여 본 연구에서는 범용 GIS 프로그램에서 카토그램이 쉽게 제작될 수 있는 환경을 제안하고, 일반인이나 GIS 초급자들도 손쉽게 구현할 수 있는 과정을 제시하였다. 또한 카토그램의 시각적 정보 전달 및 활용성 증대을 위해서 본 연구에서는 Dorling (1996)이 개발한 원형 카토그램 알고리즘(Circular Cartogram Algorithm, CCA)과 ArcView GIS 3.3. 프로그램의 내적 결합 방법을 적용하여 CCA 기반의 원형 카토그램이 범용 GIS 프로그램내에서 효과적으로 구현될 수 있는 사례를 계시하였다. 마지막으로 실질적인 카토그램 제작 사례로써 2005년 인구 센서스 자료를 대상으로 인구와 가구 변수의 카토그램 지도를 통한 관련 센서스 변수들과 지리적인 공간 분포 패턴의 시각적 분석의 가능성을 제안하였다.

Keywords

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