Nav VI

[Grumpy Goat]

Wow! That's a ton of reference points. The overall route graph and history (on the map) is nice. How are the Index/Leg info created?

At every Index-numbered event a latitude/longitude reading is taken from the satellite of the location of the GPS unit on a known map grid, so elevation is known. Then at the next reading, when another location is known, the distance between the two locations is known in 3-space. The time between the readings is the denominator in the speed calculation, and all the data is then known and recorded in the GPS's storage.