Constructing Area Cartogram Using a GIS Based Circular Cartogram Technique

서지정보

· 발행기관 : 대한지리학회
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· 저자명 : 김영훈

초록

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 rescaled 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
cartogram 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 cartogram 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.

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