In dash H/U GPS software?

I am finally going to upgrade the stereo on my 09 ... probably with one that has in dash GPS. Just a couple questions:

1. Has anyone found a resource that lists which brands of H/Us have what GPS software? For instance I saw a post here somewhere that said Kenwood uses Garmin for their GPS. What about Eclipse, JVC and Pioneer? Unfortuntely most product info doesn't address this question.

2. Are these units generally sensitive enough that their GPS antennas can be mounted inside (underdash or on inside of windshield)? For those choosing to mount then external are there any locations that give a clean wiring path?

 

I only know that Kenwood uses Garmin and Pioneer uses Tele Atlas... not sure of the other two.

No need to mount the GPS antenna external. I actually have my antenna for my Pioneer mounted directly under the middle of the dash. It's wedged in the little space on top of the air vent and underneath the dash behind the radio, out of site. I get perfect signal there.

 

Mine is also mounted inside the dash between the vents and dash internally.

 

+1 on the interior mounted antenna. works just fine.

 

I expect they all use TeleAtlas or Navtech for the actual map data but I was curious about the user interface and route calc algorithms. Perhaps if they don't say it is just proprietary. In addition to Kenwood/Garmin link I see that Eclipse has one unit with an actual removable Tom Tom GPS unit.. also serves as detachable face security. Interesting...

I also wonder about the costs for map updates and such. They never tell you the full story in any of the specs listing or brochures.

Thanks for the reports of the antennas working well underdash. Much neater install that way.