ボロノイ分割を用いた歴史的地勢境界データの生成

Abstract

Spatial data of historic geographical features boundaries between countries, counties or villages are required for using GIS (Geographic Information System) in the historical studies. However, such historical boundaries have often kinds of uncertainties; they depend on periods or researcher's opinions. Sometimes they include undefined parts. Therefore historical boundaries, especially those before Edo Period, have rarely been digitalized to spatial data. In this paper, a method for automatic generation of the boundary data using the Voronoi division is proposed. Were rough shapes of the core domain is initially given. Experimental comparison of the proposed method and an existing method is presented.