Cho Mi Gyung, Cho Hwan Gue

The Transactions of the Korea Information Processing Society (1994 ~ 2000), Vol. 5, No. 1, pp. 191-201, Jan. 1998
10.3745/KIPSTE.1998.5.1.191,   PDF Download:

Abstract

Rubber sheeting is the one of basic problems in Geographical Information System(GIS), which is a mapping procedure to reslove mismatches between two similar geographic maps representing the same region with a few mismatches. Mismatches are resulted due to the diversity of database sources, the methodology of map production and state of update of information. In this paper we propose a new rubber sheeting algorithm for resloving these mismatches, which degrade the quality and accuracy of GIS. The basic idea of our algorithm is that we triangulate a polygon using the centroid of kernel area of a polygon. And for the objects outside polygons we propose one method to convert the outside areas into the set of polygons by constrained Delaunay triangulation. Also we propose new measure functions to evaluate the performance of rubber sheeting. Measure functions are based on three properties, namely topological, directional and metrical property, which represents the characteristics of the spatial information. Several experiments with real data show that our algorithm preserves topological, directional and metrical properties of a map during transformation as well as geometric accuracy.

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