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Adding more maps to SD Card for a Nuvi 205

I have a problem in adding the maps to my SD card. Already i had one map having the name GMAPSUPP.IMG so kindly suggest how can i add one more to this one.

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You can use GMapTool program to join multiple maps in one single img file. If some maps are locked - you must write the unlock codes in the img file, using this program. Do not join two or more maps with same FID's.

Img file must be placed in "Garmin" directory on the SD memory.

Posted on Jul 21, 2009

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Garmin 1450 does not recognize memory card


What are you trying to put on the SD card? A map? If so, you need to create a subdirectory on the SD card called "Garmin" and the map file and unlock file should be named "gmapsupp.img" and "gmapsupp.unl".

Sep 15, 2013 | Garmin nuvi 1450 GPS Receiver

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Garmin nuvi 215 is not detecting secondary map which I have placed on sd card. What is the solution?


The map must be named "gmapsupp.img" on the SD card and not "gmapprom.img" like on the internal memory of the unit.

Sep 12, 2013 | Garmin nuvi 215 GPS Receiver

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Garmin nuvi 200 SD card


Did you rename the file extensions? On the unit, the map file and map unlock file must be named gmapprom.img and gmapprom.unl

On the SD card they must be named gmapsupp.img and gmapsupp.unl.

Also copy your garmindevice.xml file over to the SD card too.

Feb 26, 2013 | Garmin nuvi 200W GPS Receiver

1 Answer

Garmin Nuvi 1350 showing on screen "no map data available"


Shut off the nuvi.

Remove any memory card (if equipped) from your nuvi.

Plug the GPS into your computer via USB cable.

Open the Garmin "drive" icon in "My Computer"

Navigate to the x:/Garmin directory or "folder" (where "x:" is the drive letter assigned to your Garmin). Locate either map files set(s) named: gmapsupp.img or gmapprom.img.

Some units store map files in the hidden x:/.System directory instead. To view the .System folder and contents, you must direct your computer to display both the "system" and "hidden" files.

If you lack large files named either gmapsupp.img or gmapprom.img (about 1 GB or more); your maps are missing from the internal memory of the nuvi and will need to be reloaded.

If you pulled a memory card above, reinsert it and check the directories for the same gmapsupp.img or gmapprom.img files. If they're not present there, the maps should be reloaded.

I hope this helps


Sep 15, 2011 | Garmin nuvi 1350 Car GPS Receiver

1 Answer

I bought a lifetime update from Garmin a few years ago but now my nuvi 270 tells me that I don't have enough memory to install the latest maps and that I must choose only certain regions. I have an 8Gb...


The internal memory of the nuvi is full. Some maps will need to be delete before any new maps can be added. Typically, the map in the nuvi is named GMAPPROM.IMG and a map installed to an SD (or SDHC) memory card is named GMAPSUPP.IMG.

1) Remove the SD card from the memory slot

2) Connect the nuvi to the computer via USB cable.

3) Open the nuvi drive.

4) Locate and delete the GMAPPROM.IMG (or GSUPPROM.IMG) file(s). Optionally copy (instead of deleting) them to your hard drive in case there is a problem wit the new map file(s).

5) Empty the Recycle Bin.

6) Retry the map update of the nuvi.

This method will take some time to perform depending on how many map segments you are sending to the nuvi. Transferring the entire map can take over an hour. A quicker way is to send the maps to the SDHC card directly by inserting the card into a card reader. This eleminates the slow Garmin card reader from the equation and transfers are done in a fraction of the time. No maps will be on the nuvi - they will all be on the memory card instead. To update the SD or SDHC card, do this:

1) Repeat steps 1 thru 5 above. This removes the maps files from the nuvi.

2) Disconnect the nuvi from the computer.

3) Connect a card reader to the computer.

4) Insert the SD or SDHC card into the reader.

5) Locate and delete the GMAPPROM.IMG (or GSUPPROM.IMG) file(s). Optionally copy (instead of deleting) them to your hard drive in case there is a problem wit the new map file(s).

6) Update the map to the SD or SDHC card.

When either method is employed, only one map file set will result. GMAPPROM.IMG or GMAPSUPP.IMG is the name of this file set. You should ensure / change the name to GMAPPROM.IMG. Any subsequent file set added should be named GMAPSUPP.IMG.

I hope this helps & good luck! Please rate my reply - thanks.

Jun 27, 2011 | Garmin nuvi 200W GPS Receiver

1 Answer

Hi, I have a Nuvi 255 (205 series) gps, three years old. Last week the screen went blank, came back grey with 'crosshairs' and a black dot in the middle indicating 'press here'. I did so and the dot moved...


Graham - what your describing sounds like you somehow managed to erase the street level maps and POIs in your Nuvi.

If you connect the GPS to the computer with your USB cable, you should at the contents of the Nuvi directories and find a file called GMAPPROM.IMG or GMAPSUPP.IMG. These are the street level map files. Generally, these are found in the root directory of the Nuvi - or if yours has / and you use a memory card slot for maps - find it in the /GARMIN directory. GMAPPROM.IMG is the name of the first map set and GMAPSUPP.IMG is the name of the supplementary or second map set (if you purchased & installed one). You will likely have only one of these files - and may be named either. The size of this file depends on the area and age of the map. Current maps of the entire US run over 1 GB in size. If you do not have any maps named GMAPPROM or GMAPSUPP, you will not see any street level maps.

Something happened to delete the maps. Garmin will probably NOT provide free replacement maps for you, unless under warranty. If the devices is trashing maps and other files, you probably want to replace the unit under warranty or not. Garmin will, upon return of your old Nuvi - replace it with a factory refurbished unit with the latest maps installed, for $79. You can take advantage of this service by following this link to Garmin Service.

I hope this helps and good luck! Please rate my reply. Thank you.

Mar 23, 2011 | Garmin nuvi 205 GPS Receiver

1 Answer

I have lost all UK & Europe mapping - except for major roads. This was initially built in to unit. Have SD card for Australia & New Zealand - this works fine.


The maps are stored in specific mapset files with *.img extension in the flash memory of the GPS unit. Each mapset file contains one or many maps in it. Beside that, the Garmin GPS navigator can also recognise and load up one additional mapset file from SD card residing in the "Garmin" folder and named as "gmapsupp.img".

Here are the mapset files supported by Garmin Nuvi 255w GPS navigator:
  • gmapbmap.img - the default base map
  • gmapprom.img - the primary mapset
  • gmapprom1.img - the secondary mapset
  • gmapoem.img - the OEM mapset that cannot be unselect by user (if it exist)
  • gmapsupp.img - the supplemental mapset which you can have one in the GPS flash memory and another one in the attached SD card.
Therefore, the Garmin Nuvi 255w GPS supports up to 6 mapset files, including 1 in SD card. Normally new maps installed by the user will be stored in gmapsupp.img.

You will lost all the maps in the previous mapset file if it is overwritten by a new file with same filename. If you want to keep the existing maps, ensure that you store the mapset file with an unused filename (from the 5 filenames above). Alternatively, you can make use of special tools to merge new maps into existing mapset file.

You can view the name of your base map in Tools > Settings > System > About > Basemap.

You can view the name of maps in the other mapset files in Tools > Settings > Map > Map Info. There, you can tell the GPS to load the map by checking on its name, or not to use the map by unchecking it.

In case there are 2 or more non-overlaping maps available for the same location, the map with the highest priority number (defined in the map itself) will be used by the GPS.

Note that certain map which are locked by vendor need a 25 bytes unlock key stored in a *.unl file in the same folder and with the same name as the mapset file where the locked map is stored in.

You might probably also interested to read:

Mar 13, 2011 | Garmin nuvi 255W GPS Receiver

1 Answer

Gps has lost its maps, screen says can't unlock maps


There several reasons you may receive the message Can't Unlock Maps on your nuvi or zumo device.
  • Can you press OK and get to the Where To/View map screen?
  • Did you load maps to the unit using the MapSource or MapInstall program?
  • Did you load maps to an SD data card?

If one of the points above applies to you, please follow the steps below to clear the Can't Unlock Maps message:
  1. Remove SD card from unit, if applicable.
  2. Plug the unit into your computer with a compatible USB cable.
  3. Open MyComputer/Computer icon. (Mac users skip this step.)
  4. Right-Click on the Garmin drive and select Open. (Mac users can locate the Garmin drive mounted on the Desktop.)
  5. Open the Garmin folder.1
  6. Locate a file named gmapsupp.img
  7. Right-Click and delete file named gmapsupp.img
  8. Safely disconnect your unit from your computer to see if the Can't Unlock Maps message is gone.

1. Nuvi 1100/1200/1300/1400/1600/3700 and Zumo 665 users will open the Map folder instead.

*If the gmapsupp.img file does not appear in the Garmin folder, please create an unlock file for device.

Nov 28, 2010 | Garmin Nuvi 265W GPS Receiver

1 Answer

New Sd CArd-8gb. Trouble completing upload maps.


I have uploaded maps to a SD micro card from my Nuvi 250 to my Nuvi 205 but the 205 wont give me the option to select maps from the SD Card.

Can some one please help.

Thanks in advance.

Jul 08, 2009 | Garmin Nuvi 660 GPS Receiver

1 Answer

Garmin Nuvi 200 Maps Disappeared


Hi,
Hope this helps!

I wanted to add maps to my 250W. I found the maps I wanted on a Torrent. However, many searches around various forums never revealed how to install these. Found the following through reading and experimentation.

1. Downoaded map image file GMAPSUPP.IMG. Download also gave me "Use code XXX when generating unlock code for maps"
2. Downloaded Garmin Unlock Generator 1.3 by JetMouse
3. Looked on my GPS to find the UnitID
4. Entered the UnitID into Garmin Unlock Generator. Ignore the GM XT device unlock code and the top Generate button.
5. Selected Map Product as Custom and entered the code given for the downloaded image file.
6. Hit the bottom create button to generate a 25 digit code.
7. Download Img2Gps and run
8. Click Load Folder to load the image file. Select the tick next to it.
9. Check the Use Unlock Key option and paste the 25 digit code in.
10. Load a blank SD card into your Garmin
11. Connect the Garmin to your PC using a USB cable. You should see two dirves in windows: one is the Garmin and the other is the "Removable Disk" SD card.
12. Create a folder called "Garmin" on the SD card
13. Select Folder/Card in Img2GPS
14. Click "Copy Maps". Select the folder /Garmin on the SD card. You may need to click copy again.
15. Upload will take a while.
16. You should now see a file GMAPSUPP.IMG on the SD card in the /Garmin directory.
17. Create a new text file called GMAPSUPP.UNL in the same directory (make sure it does not have a hidden .txt extension).
18 copy the 25 digit unlock key into this file.
19. Close the file.
20. Disconnect the Garmin.
21. On Startup it should load your original maps and the new ones.

May 28, 2009 | Garmin nuvi 200W GPS Receiver

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