Photogrammetry has been traditionally defined as the art and science of deriving three-dimensional information from imagery. As for the GIS it can be seen as a system of hardware, software, and procedures designed to support the capture, management, manipulation, analysis, modeling, and display of spatially referenced data for solving complex planning and management problems. With the recent advances in digital photogrammetry and related disciplines, the definition of photogrammetry can be changed to the art and science of tool development for automatic generation of spatial and descriptive information from multi-sensory data and/or systems. Therefore, photogrammetry cannot be viewed as just a data acquisition mechanism for GIS. Photogrammetry and GIS are becoming closely interrelated. In this research, we are using data from GIS databases as control information for automatic orientation of aerial and satellite imagery (Figure 1). Following the orientation, changes and discrepancies between recent imagery and existing GIS databases are automatically highlighted for change detection and updating purposes.

Figure 1: Road network in: (a) the object space (b) the image space.