Notes about the TPG file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The TPG file type is primarily associated with 'TOPO! Sync' by National Geographic. TOPO! Sync has consolidated .TPG files under the umbrella of the .TPO (which see) file. You can view existing .TPG files in TOPO! Sync by going to File | Merge .TPG Region. Browse and find the location of the .TPG (or .TPO) file you wish to open in TOPO! Sync. While .TPO files contain route, symbol, text and bookmark information, .TPG files are concerned exclusively with preserving GPS waypoint and route data.