Notes about the RVF file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The RVF file type is primarily associated with 'TNTmips' by MicroImages, Inc.. Applies to the entire TNT product line, including a free viewer. The TNT products support fully integrated GIS, image processing, CAD, TIN, desktop cartography, and geospatial database management.