The navigation module it is "selph" three generation? Another one I mainly use it to measure the land area, easy to use, the error is not big?I want to buy Magellan 500 do not know whether it is good to use
A type specific.GPS chip area measurement is the most "selph" 3 generation, special machine is very good, the error is very small.
Professional handheld GPS only Magellan and set SIBAO
Can only use professional GPS measuring instrument! Magellan and SIBAO!
