How to open mapsource .img files

Written by eric som
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How to open mapsource .img files
Use Mapsource on your PC to open .IMG files. (laptop computer image by patrimonio designs from

Created by Garmin, Mapsource is a mapping program that allows GPS users to create, edit and modify various types of GPS data. Since Mapsource, by default, does not open .IMG files, you must use MapSet Toolkit and Cgpsmapper to open .IMG files in Mapsource. These free applications allow you to create custom maps that are compatible with Mapsource. Opening .IMG files to Mapsource provides you with the option to importing your custom maps directly to your Garmin device.

Skill level:


  1. 1

    Download MapSet Toolkit by clicking on the "" link on the application's home page (>

  2. 2

    Select "Save File," choose a location on your PC and then download the file. Install the application by double-clicking on the file and then following the prompts.

  3. 3

    Go to the cGPSmapper home page (, click on the "cGPSmapper version 0100a for Windows" link, choose "Save File" and then choose a PC location for the file. Install cGPSmapper by double-clicking on the file and then following the prompts.

  4. 4

    Go to the "C:\Garmin" directory on your PC and then create a subdirectory. To create a subdirectory, right-click in the "C:\Garmin" directory, select "New," choose "Folder" and then type a name for the subdirectory.

  5. 5

    Drag your .IMG file into your newly created subdirectory. Since MapSet Toolkit does not recognise files with non-numerical names, rename your .IMG file by highlighting the file, right clicking, selecting "Rename" and then typing a numerical name for the file.

  6. 6

    Open MapSet Toolkit, click on the "Select IMG files" button, select your .IMG file and then choose the "Add" button. You have the option of adding multiple .IMG files.

  7. 7

    Select the subdirectory that contains your .IMG files as the "Mapset directory" under the "Create Mapset" section of the dialogue box and then type a name for your mapset and any four-digit code in the "Mapset name" and "Product code" fields, respectively. If you would like to enter copyright information, type the information in the "Copyright info" field.

  8. 8

    Select the location of the "cgpsmapper.exe" directory at the lower left of the dialogue box under the "cgpsmapper" section. Typically, the "cgpsmapper.exe" directory is located in the "C:\Program Files\cGPSmapper" directory.

  9. 9

    Check the "Install in MapSource" box located under the "Options" section, click "Start" and then wait as Mapset Toolkit converts your .IMG files. Receive a "Convert Termined" message in the dialogue box.

  10. 10

    Open Mapsource and find your .IMG file located under the top left-hand corner displayed as the name of your mapset. You have successfully opened an .IMG file in Mapsource.

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