Compass and altitude

A compass and an altimeter. This is made using the standard android libraries and I make absolutely no guarantees about their accuracy. (It works fine on my phone but on my Google Nexus 10, the compass is 90 degrees out). Google will not let me use their elevation data with out a map, so the height is taken from the WGS84 meridian. This means you will need to know your local EGM96 variation to make sense of it.