How does the iPhone 5 measure elevation? I use an app called MapMyRun on the iPhone 5. In it is a report that shows elevation changes during the run. 



Now to my knowledge, the iPhone5 has an accelerometer and GPS+. 

The iPhone5 has no barometer or other way to measure elevation. 

My question is - how does the iPhone5 measure elevation?
Measurements are done using the GPS. 

INFO: http://gpsinformation.net/main/altitude.htm


  GPS altitude measures the users' distance from the center of the SVs orbits. These measurements are referenced to geodetic altitude or ellipsoidal altitude in some GPS equipment.