Multiple maps on SD

[Ringman]

iron1899,
Hope this helps:

From Garmin:

What is the largest size microSD card I can use with my eTrex 20 or 30?

05/22/2012

The eTrex 20 and 30 have an expandable memory slot into which a microSD* card can be inserted. This card provides the ability to install detailed mapping to enhance the device's internal basemap.

It is recommended a standard speed card, no larger than 32 GB, be used in order to get the best performance from the device. Class 4 to Class 10 is considered standard speed.

While considering memory limitations, another limitation is the number of individual mapping segments. Roughly 3,000 mapping segments can be transferred to the eTrex 20 or 30.The eTrex will pick and choose which map segments to show when the map segment limit is surpassed. It is suggested to transfer additional mapping segments to another microSD card.

*While any microSD card brand should work, Garmin has only tested more common brands such as SanDisk and Kingston.

++++++++++++++++++++++++++++++++++

Garmin used to allow only one extra map in addition to the supplied basemap, and it had to be called 'GMAPSUPP.IMG'. They dropped that limitation in the Dakota / Colorado / Oregon series, and now you can use several maps in the 'GARMIN' folder on the memory card, with any file names, provided that the files are in Garmin map format and the file names have the '.IMG' extension. (Using a card reader with a Class 10 MicroSD will transfer map IMG's much faster than going through the etrex 20)

[babj615]

Hi, I have a Garmin etrex 20 and and a 32GB micro SD card. I'd like to put multiple maps on the SD card. Can I just add the .img files straight to the SD card, or do they need to be organised on the card in a particular structure?

They must be in the [uSD Card]\Garmin\ directory.

[big_kolm]

Hi All,

I have NUVI 760, updated the firmware today and found what support for a second map on an SD card was added in latest version.
Garmin: nuvi 7xx (GCD file) Updates & Downloads
I tried to put second unlocked map on SD card with names gmapsupp1.img, gmapsupp2.img, gmapsup1.img, gmapsup2.img and gmapprom.img.
No success. Does anybody know how I can use it?

Thanks

[bjjfc]

@big_kolm
try gmapsupp.img, put in sd card\Garmin folder.

[Berin]

Hi All, new to this. I have a Garmin Montana, and an SD card with GB Discoverer. On the Device I have the following files:

Device\garmin\gmapbmap.img (basemap?)

Device\garmin\gmapsupp.img (worldwide Autoroute DEM basemap?)

Device\garmin\OSM-Morocco.img (OSM Morocco, transferred using mapinstall)

On the SD card I have:

SDcard\garmin\gmapsupp.img

SDcard\GBdiscoverer (empty folder)

I'd like to add CN NT 2013.3 UK to the SD card (1.12gb free of 3.68gb), can I do this without losing my GB discoverer maps?

thanks,

[kar1zma]

is it necessary to rename the maps to gmapsapp.img to work

i downloaded new maps but they dont work
its named gmapprom.img the older maps are named gmapsapp.img

should i rename and try


the older maps also had a .unl file
i didnt find any .unl file when i downloaded my new maps
what is this file
do i need it

[helsan]

Does the Garmin 255 support Multi maps? Like USA+Canada on Garmin + Portugal/Spain on SD


Thanks

[saphirrez]

gimana cara menggunakan peta ct nav + topo srtm sea + bluechart g2 di nuvi? mohon saran..soalnya peta2 itu saling numpuk gak jelas kalau dipasang bareng2, tp kalo di 62s gak masalah..Tengkyu

how to use ct nav + topo srtm sea + bluechart together in garmin nuvi? mine is 3770? there's a problem to show them together, but in 62s there's no problem.
i write it with gmaptool setting it draw priority and transparency but the result isn't good enough..any comment please..thank's a lot