A comparative study on dispersions of building coverage ratios around buildings in between blocks and street districts using the fundamental geospatial data and the digital map.

Abstract

In this paper, an index named building coverage ratios around a building is applied for finding the dispersions of density of urban areas. The ratios are calculated for each buildings in Taishidou 2-chome, Setagaya ward, Tokyo, using the fundamental geospatial data and the digital map provided from the Geospatial Information Authority of Japan. The dispersions are compared in between blocks and street districts. The street districts are defined as Voronoi regions generated from road centerlines. As the result, the dispersions in case of street districts are almost always smaller than that of blocks. A visualizing method for the distribution of building coverage rations calculated at points on street lines are also proposed.