Help with installing custom maps in Basecamp.

[MultNen]

I have an .img file I want to use with Basecamp, but I can't figure out how to add it to the program. What are the steps to install custom maps?

[Boyd]

"Custom maps" has different meanings. On this site, the owner likes to use it to describe any map that doesn't come from Garmin. Garmin has a different definition though, it's a special kind of map you can make yourself from aerial imagery or scanned paper maps. These are .kmz files, not .img files however.

What is the source of your .img file? Is it a file from a GPS unit? .img files are "containers" and Garmin puts different things into them which require different treatment.

If it's a file from a GPS, then you can't "install" it in Basecamp, but Basecamp will recognize it on a GPS that is connected to your computer. Likewise, you could create a Garmin folder at the root level of a USB flash drive or SD card and copy the .img file there. Basecamp will treat that the same as if it were a GPS. See this for another way to do this without a flash drive.

https://www.javawa.nl/virtualdevice.html

Now, some people distributed their Garmin maps as individual .img files many years ago on this site. These are completely different, this tutorial explains how to use them

https://www.gpsfiledepot.com/tutorials/how-to-load-.img-files-into-mapsource-with-mapsettoolkit/