a little something to help-
Map format information
gmapsupp.img - a supplemental user-added map
this one is the correct format for a micro SD card
It must be located inside a folder called 'garmin'
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gmapbmap.img - is the unit's pre-loaded basemap
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gmapprom.img - is the unit's pre-loaded City Navigator maps
this is the one kept in the unit's own memory (NOT on datacards)
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TIP!
ON DATA CARDS:
you can store many mapsets on an sd card or micro sd- just name them whatever you wish so you can recognise them but the gps will not- so it will ignore them.
When you need a new map-RENAME the chosen file gmapsupp.img making sure you rename the previous one you were using with some other name before doing that else you could erase it!
 so many tips- so little time!
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