On-line integration of photogrammetry and GIS to generate fully structured data for GIS

Abstract

An important issue in implementation of a GIS system is preparation of data to be entered in GIS. To produce spatial data for GIS using photogrammetric techniques, conventional approach is to utilize photogrammetric and GIS systems individually (off-line procedure). Preparation of spatial data on the basis of the mentioned method has some problems, such as: difficulties in conversion of spatial data from CAD systems to GIS, reduction of the spatial data accuracy in editing process, impossibility of simultaneous attribute data adding to spatial data, and increasing the cost and time of data production and preparation process. Feature digitizing from photogrammetric models can be performed in an interface GIS environment by on-line integration of photogrammetric and GIS systems. Based on this approach, generated data can be saved with standard structure and format defined by GIS environments and directly used for GIS analysis without further editing. In this paper, design and development of a software package called Online Integrated Photogrammetric GIS (OIPGIS) is described. It was successfully implemented for the first time. Above system overcomes mentioned problems in off-line approach, and saves time and cost of spatial data production significantly.