1. Place names provide the most useful geographical reference system in the world. 2. I was after something more basic, a kind of visual cross-referencing system . 3. Both are geodetic reference systems based on slightly different assumptions and measurements. 4. It is equipped with a muzzle reference system and dual-axis stabilisation system. 5. The latitude and longitude are expressed in WGS84 geodetic reference system . 6. Military Grid Reference System coordinates ( see definition ) : 32NPM0853366530Guneku Weather, Cameroon 7. A formal definition of the coordinate reference system ( encoded as CRS components. 8. It is currently the reference system being used by the Global Positioning System. 9. I am sorry for my failure to understand how the referencing system works. 10. The Washo language of California and Nevada exhibits a switch-reference system .