GPS:
Then came GPS devices that had in built maps and the ability to put that point on the built in map.
The New Cell Phones can show your location on a map even if there is no cell signal. But this is where the issue / confusion starts:
1) Most cellphones download only a part of the map (typically of the area you frequent) , so if you are in Spokane the cell phone will have the map of that area. Now if you switch off the cell signal and wifi and come to New Jersey, you will either see a blank screen with dot OR a very basic map with the dot. Based on your location, the cell phone download the required map area on the fly using cell phone data or wifi. That is why in bad cell reception, people don't see the map and feel that GPS does not work without cell signal.
2) This happens if you open your app mid flight, as no cell signal / no WiFi, you only see a moving point
3) Google remedied by allowing you to download maps for offline use OR as with many app , having the full map downloaded for offline use.
I hope this helps bring some clarity.
But I like this Car Play GPS .. it has android auto also ... i have recently started using the android auto in my car and have started loving it (usual apps available, no need to add address etc to the car system etc.) ... this devices if good , will be a good investment ....
GPS devices uses satellite to find the coordinates on the ground. Old school Garmin just showed a blank screen with a point with your coordinates.Moto, I just did a bit of research on your query, and yes, my understanding of cellphone/gps functionality is correct. I phone and Android phone gps will function correctly without a cell phone signal. Google is your friend.
Mike
Then came GPS devices that had in built maps and the ability to put that point on the built in map.
The New Cell Phones can show your location on a map even if there is no cell signal. But this is where the issue / confusion starts:
1) Most cellphones download only a part of the map (typically of the area you frequent) , so if you are in Spokane the cell phone will have the map of that area. Now if you switch off the cell signal and wifi and come to New Jersey, you will either see a blank screen with dot OR a very basic map with the dot. Based on your location, the cell phone download the required map area on the fly using cell phone data or wifi. That is why in bad cell reception, people don't see the map and feel that GPS does not work without cell signal.
2) This happens if you open your app mid flight, as no cell signal / no WiFi, you only see a moving point
3) Google remedied by allowing you to download maps for offline use OR as with many app , having the full map downloaded for offline use.
I hope this helps bring some clarity.
But I like this Car Play GPS .. it has android auto also ... i have recently started using the android auto in my car and have started loving it (usual apps available, no need to add address etc to the car system etc.) ... this devices if good , will be a good investment ....