SD Card Installation¶

Step-by-step guide to install a Garmin map downloaded from this site onto a micro-SD card.

Prerequisites¶

Procedure¶

1. Download the map¶

Go to the Downloads page and download the desired map(s).

Files are in .img format, named according to the convention:

IGN-BDTOPO-D038-v2026.03.img     ← department (Isère)
IGN-BDTOPO-LA-REUNION-v2026.03.img  ← overseas territory
IGN-BDTOPO-FRANCE-SE-v2026.03.img   ← France quadrant

2. Rename the file¶

Garmin devices only accept files named gmapsupp.img, gmapsupp1.img, gmapsupp2.img, etc.

Rename the downloaded file to gmapsupp.img before copying it to the SD card.

3. Create the Garmin folder and copy the file¶

Create a folder named Garmin at the root of your micro-SD card (if it doesn't already exist), then copy the renamed file into it.

4. Insert the card into the device¶

Remove the micro-SD card from your reader and insert it into your Garmin device.

5. Activate the map¶

After these operations, verify that the map is active in your GPS: Settings > Map > Map Information.

Installing multiple maps¶

It is possible to install multiple maps simultaneously on your Garmin device.

To do this:

1. Download the additional map.
2. Rename the downloaded .img file by suffixing it: gmapsupp1.img, gmapsupp2.img, etc., depending on the number of maps already present in the Garmin/ folder of your SD card.
3. Copy this file to the Garmin/ folder on your micro-SD card.