This altimeter delivers the altitude of your current position either from the device (GPS)
or from the
digital elevation model (with a horizontal accuracy of 30m).
Depending on your current position and your device one of the two methods is more
correct. Using GPS on the device is known for a large error in the altitude for difficult
receiver conditions it's not available for network based positioning at all.
database for the ASTER data.
How to install
There is no need to install this aplication on the iPhone. Just open
in the Safari browser. You can add it to
the home screen by clicking the little plus at the bottom browser bar: