Quote:
Originally Posted by Kennyeth
That, surely has to come from a Satellite signal!
making my post #5 correct 
do we all agree on that then???
Ken. |
All the GPS satellites do is enable your GPS unit to work out where on the earth you are, by working out differences in time / time delays between your reception of each satellite - nothing more than that.
A separate part of your GPS system has the maps, which it can put on the display along with your reported by the GPS position on that map.
My first GPS system contained just the GPS reception unit, that output a text string of bare Lat/Long information, ASL and the time, which it did every second. I then fed that text string into an early laptop, which ran maps and calculated routes on the then very crude maps.