CONCLUSION
This paper introduced Fugro EarthData’s GeoSAR, a dual-band IFSAR system, in the context of large-area topographic mapping. GeoSAR’s image and elevation data are useful for numerous TLM applications, including natural resource management, economic development, infrastructure planning, national security, and disaster preparedness. Interpreting GeoSAR and sharing feature data using a common interface and a database is critical for efficient TLM production.
PurVIEW is a GIS-integrated 3D stereoscopic mapping tool that can be used for image interpretation and feature extraction. Using PurVIEW, GeoSAR analysts compile large-area TLMs using precise orthorectified radar image mosaics and DEMs. The feature data are extracted directly into a geodatabase where it is compiled and incorporated into GIS applications. The tool’s accuracy is equal to or superior to that of photogrammetrically compiled TLM data.