How to calculate moving average speed from GPS?

Question

I\'m developing an android application using GPS. I\'d like to implement a feature that displays the users average speed over the 1/5/15 minute. Something like the CPU load on u

Answer 1

Heres one way to go about it that is pretty straight forward:

If you are sampling position every second keep 901 samples in a queue, thats 15 mins worth (and 1 extra). Position 0 is the most recent measurement, effectively your current position.

For an average speed over the last X minutes:

s = X * 60;
point1 = postion_queue[0]; // this is your current position
point2 = postion_queue[s]; // this is your position s seconds ago
d = distance_between_points(point1, point2);
speed = d / s;

speed is now distance units per second, convert to mph, or kph or whatever units you need. Different values of X can be used for any average between 1 and 15 minutes.