How to merge Garmin maps with Gmaptool

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How to merge Garmin maps with Gmaptool

If you have a lot of map that you want to load into your GPS, or you want to store all the maps into SD card which supports only a single gmapsupp.img in it, you might need to combine (join) the maps into one mapset file ( a maximum of 2024 *.img files is supported ) by using specific software tool. GMapTool is one of the powerful tool which allow you to join and/or split maps in mapset file.



Run the GMaptool.exe (any version will do but the interfaces may be slightly different).
[Only registered and activated users can see links. ]



Firstly, store all the mapset files you wish to combine in different filename in your PC. It is recommended to store them in the same folder/directory.

Under the Files section of GMapTool, select the maps you want to combine by clicking on Add Files (to select one file at one time) or Add Directories (to select all *.img files in the directory)or drag your individual IMGs into the FILES window. Note that you can always remove any file in the listing by selecting it and press the Delete button of your keyboard.

Spoiler: CLICK

When you are done with the mapset selection, continue to the Join section.



Specify the Output File( name it gmapsupp.img), and key-in the Mapset name of your file to be created. This mapset name will be displayed under each of the map name when you list your maps in Map Info function of your Garmin GPS.

Click the Join all button, and the combined mapset will be created. You can then copy the new mapset file to your Garmin's internal storage or in Garmin/SD card.

if you have multiple maps on a gps-you can't display two maps that cover the same area at the same time-one will have to be deselected

Note that if any of the maps in your mapset file is locked by vendor, you still need the 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. To unlock 2 maps inside the mapset file, put both the keys inside the *.unl file one after another, without space (the file size will be 50 bytes then).

or unlock with
[Only registered and activated users can see links. ]