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Creating and Loading Custom Maps to the Overlander

Garmin has released a software update that allows the Overlander to use custom mapping. Before creating and transferring custom mapping, ensure the device firmware is up-to-date by following steps in  Wireless Map and Software Update Instructions

Map images can be found in several different file types. Often files can be found in incompatible formats like PDF, BMP, PNG, or GIF. You will need to convert these file formats to the JPEG format before they can be used to create custom maps for a compatible device. The maximum JPEG size is 3MB.

To Create a Custom Map from a JPEG File:

  1. Open Google Earth Pro1

  2. Zoom into the approximate area the custom map will cover

  3. Select Add from the menu

  4. Select Image Overlay

  5. Name the map file

  6. Click Browse

  7. Locate and select the JPEG map file

    • If your map is printed, scan the map at an appropriate resolution, and save the image as a JPEG

    • If your map is electronic, such as a PDF, it may require conversion to JPEG format through GIMP2 or another suitable program

    • JPEG files must be saved without Progressive Image (typically found under advanced options)

  8. Click Open

  9. Resize the image to match the satellite image

    • Adjust the transparency bar between 50% and 70% while resizing the image

    • Start at one corner and zoom in

    • Position the mouse cursor over the corner to click and drag the corner to the approximately correct position (focus on roads closest to corner)

    • Move the map to the opposite corner and re-position

    • Repeat for each corner

    • Double-check all corners again and adjust as necessary

    • Change the Transparency back to 100% Opaque

    • If finished resizing the custom map, select the Altitude tab

    • If the custom map needs to be viewed above all other maps, change Draw Order to 50 or higher

    • If the custom map needs to be viewed below all other maps, change Draw Order to 49 or lower

    • Click OK

  10. Locate Places (left of the map)

  11. Locate the Custom Map (named according to step 5)

  12. Right-click on the map name

  13. Select Save Place As...

  14. Save the map to the computer as a .kmz file

  15. Open the internal storage of the Overlander

  16. Open the Garmin folder

  17. Create a new folder named "CustomMaps" with no space

  18. Transfer the custom map .kmz file into the CustomMaps folder from the computer

  19. Unplug the Overlander from the computer

  20. Power on the Overlander

    • It may be necessary to reboot the Overlander

The custom mapping can now be viewed in the Garmin Drive app on the device. It will not be available in the Explore app.

To Enable/Disable the Custom Maps on the Overlander:

  1. Touch Settings
  2. Touch Navigation
  3. Touch Map and Vehicle
  4. Touch Map Layers
  5. Touch Custom Maps
    • BirdsEye images are considered Custom Maps.
  6. Touch OK

1Google Earth Pro is a third party program that allows you to create a custom map. It can be downloaded and installed on your computer for free by visiting https://www.google.com/earth/versions/#earth-pro. It is necessary to install Google Earth Pro on your computer and not use the web version of Google Earth.

2GIMP is a third party graphic editing program that allows a PDF to be converted to JPEG format. You can download GIMP for free by visiting https://www.gimp.org/downloads/

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