Accuracy Estimation of Digital Map Series Data Sets Published by the Geographical Survey Institute^*

Abstract

Little information has been made available on the accuracies of the Digital Map Series data sets published by the Geographical Survey Institute (GSI) . Nevertheless, provision of this meta-knowledge is important to enhance a users understanding of the results derived from spatial analysis. This paper estimates the accuracies of the Digital Map Series data sets. The estimated root mean square errors of; Digital Map 25000; Digital Map 10000; Digital Elevation Model (DEM) 50m; DEM 250m and DEM 1km; are less than, 18.5m, 7.4m, 7.2m, 50m, and 50m on the ground, respectively.