fdrury
commented
6 years ago Using (integer) millionths of lat/lng Circumference of Earth: 40,075,000 m Latitude: ±90 (180 degrees total) Longitude: ±180 (360 degrees total) Lat/lng:
| Degree | 1 | 1/10 | 1/100 | 1/1000 | 1/10,000 | 1/100,000 | 1/1,000,000 |
|---|---|---|---|---|---|---|---|
| Distance (m) | 111319 | 11132 | 1113 | 111 | 11 | 1 | 0.1 |
Can probably safely send just up to 100ths of degrees. Using 16 bits for longitude gives values up to 0.065536 degrees Max range of 7,295 m Using 15 bits (call it 16) for latitude gives values up to 0.032768 degrees Max range of 7,295 m
Don’t need to send MSBs of lat/lng Determine maximum range and then calculate how much precision is required for lat/lng.