SEISMIC RISK MAPPING OF WOODEN HOUSE IN LARGE AREA USING THE GRID-SQUARE STATISTICS : Part 1 Estimation of population of wooden houses with different construction age

Abstract

As the basis for seismic microzoning on damage of wooden houses, the spatial distribution of the population of wooden houses should be evaluated. In this study, a procedure to estimate the population of wooden houses with different construction age is proposed using the Grid-square Statistics which is a nation-wide CIS database on Population Census of Japan. The populations of households at different periods, together with the empirical relations of populations of house-holds and wooden houses, are used to estimate the populations of wooden houses. The results from the procedure proposed are verified using the GIS data in Kawasaki and Yokohama cities.