Abstract
This study aims at improvement in the accuracy of floorage of business use buildings which was estimated by Tokyo Metropolitan Government GIS (TMG-GIS) building data. To this end, this article clarified the problems in applying the revision formula proposed by Ohba (2000) to floorage estimations using TMG-GIS, and suggested its alternative. As the control to floorage estimated by TMG-GIS, we used the digital map of fixed property tax (FPT) in M city of Tama area of Tokyo.
First, we clarified the following three problems in formulating floorage revision formula for TMG-GIS: 1) the consistency of business building usage between TMG-GIS and FPT; 2) the difference of structure classification between TMG-GIS and FPT; 3) the effect of the conversional coefficient of floorage in TMG-GIS. Second, we fomulated the revision formula by applying regression analysis to the buildings classified in business usage and structure for floorage by TMG-GIS. Last, we analyzed the effect of building usage mismatching to floorage revision formula.
