High-quality viewers calculate distance, elevation gain, average speed, and even heart rate or cadence if the sensor data is present.
The best tool for you depends on whether you need quick online access or a powerful desktop suite. UAF Geophysical Institute - Facebook gps viewer
At its most basic level, a GPS viewer serves as a bridge between a hardware device (like a Garmin watch or smartphone) and a user-friendly visual interface. High-quality viewers calculate distance
They open standard formats like GPX (GPS Exchange Format), KML/KMZ (Google Earth), and FIT (Garmin). KML/KMZ (Google Earth)