Thread: How to install any Garmin map on Iphone Garmin StreetPilot

Originally Posted by degmoura

I am using an iPhone4 5.1.1 Jailbroken.I followed the tutorial.
When I open my garmin program doesn't look like there isn't any map just a car on a blank area? My map is it unlocked.

I have exactly the same experience with a Jailbroken iPhone 4 with 5.1.1. as does "Degmoura" in Post #161.

The Garmin StreetPilot App loads without any consequences to a blank screen with the chosen car navigation icon. Interestingly, if you use the "minus" key at the top of the screen to zoom out as far as is allowed - all of a sudden a satellite image of your country location is shown on the screen. This can only come from the "gmaptz.img" file that is also loaded into the ".system" directory with the "gmapprom.img" of your designated county.

As a second point - while doing this zoom out to see the "gmaptz" global image on the screen - if the iphone suddenly aquires the satellite fix there is a zoom in to your specific country/map loaction. At this stage the screen goes blank with the exception of the various navigation icons

The key question is why are the later 5.1.1 jailbroken iPhone4's affected by the inability of the StreetPilot App to also see and operate the "gmapprom.img" file in the same ".system" directory?

Sorry - for the error in my Post #175.

I mistakenly referred to the "gmaptz.img" file when I meant to refer to the basemap "gmapbmap.img" file that provided the temporary global image on my iPhone screen, before the satellite acquistion caused the screen to then go blank.