Accessing Data from GPS
Posted: Sun Oct 19, 2008 9:12 pm
Now I can get the each intervals time, distance, elevation, and coordinates, but I'm looking for a few more things.
In the gpx info I get, there is one value of elevation for each point. Now in reality, I can see 3 ways to get elevation.
#1 Altimeter reading. I'm assuming this is what it's outputting
#2 Vertical GPS coordinate. Or maybe its this
#3 Estimating elevation by mapping the latitude/longitude coordinates onto a topo map to calculate.
My question is, I want all 3 values, and does anyone know how to get all 3, ideally in a efficient manner? I would like to formulate some sort of accuracy improvement of altitude with an algorithm considering all three values and their pros/cons.
In the gpx info I get, there is one value of elevation for each point. Now in reality, I can see 3 ways to get elevation.
#1 Altimeter reading. I'm assuming this is what it's outputting
#2 Vertical GPS coordinate. Or maybe its this
#3 Estimating elevation by mapping the latitude/longitude coordinates onto a topo map to calculate.
My question is, I want all 3 values, and does anyone know how to get all 3, ideally in a efficient manner? I would like to formulate some sort of accuracy improvement of altitude with an algorithm considering all three values and their pros/cons.