What map filenames are supported by the Garmin Oregon?
Beta software 2.99 and later included support for multiple map files on the Oregon, not just the three files below. The restrictions below only apply to earlier versions of software and are left here as a reference. As of beta software 2.99 you may store as many .img files as you want into [drive]:\Garmin and the unit will load them. This applies both the internal memory and SD card slot. The 4000 segment limit discussed below still applies. The Oregon recognizes three predefined map files in internal memory and one file on the SD card. Map sets with the following filenames in internal memory under [drive]:\Garmin will be loaded by the Oregon: • gmapbmap.img (typically the preloaded 300 base map) • gmapprom.img (typically the preloaded 400 maps) • gmapsupp.img (typically created by Mapsource) In addition a file called gmapsupp.img can be loaded on the SD card under [SD drive]:\Garmin and will work simultaneously with the img files in internal memory. The Oregon contains another map fil