Improvement of efficiency and reliability in updating GIS data by overlaying map data and digital photo images

Abstract

To improve efficiency and reliability in updating GIS data, it is important to integrate the acuquisition process of GIS data within a GIS environment. In this study, the author proposed a conceptual framwork for the integration of photogrammetric system in a GIS environment. As an example of the integration, the author showed that the efficiecy and reliability in detecting changes in aerial photos is improved by overlaying mask images generated from ‘old’ GIS data on ‘new’ aerial photos through some experiments.