VectorLTX2012 said:
Fourcam281 said:
Blue Dave said:
mcgnnty said:
Polaris put out a trail app for the Iphone/Ipod/Ipad, seems to have most of the major trails for Wisconsin and Minnesota. You can even track your routes. I use a NUVI500 myself, bought a card from sledgps.com.
Do you need to have a good 3G cell signal for the i phone trail map application to work properly?
Pretty sure the maps download on your phone so you don't need cell service.
Won't you need tower coverage to determine your location on the map?
Chester
The i phone has a GPS receiver which uses the GPS satellites to determine its exact location just like any other handheld or automotive GPS unit. It is the map database that I am wondering about. I downloaded an automotive GPS app on my i phone 4 and the map database is obtained by the phone via the 3G cell phone signal while the app is in use.
However the database for a nationwide automotive GPS mapping application is obviously much larger than one for snowmobile trails in a couple of states. That is why I am curious if the Polaris trail map app downloads the complete map database to the i phone initially or if it accesses it via 3G cell phone signal while you are using it.