jpg (and don’t have software for it), search for an online file conversion service, or learn to use GIMP. If you need to convert from a particular file type to a.This is an older page, but enough links work to make it worth sharing. DRGs are topo maps, DOQQs are aerial photos. This site has links for free raster imagery for each of the 50 United States.This may be better for park maps, marine charts and aerial photos. Use a DrawOrder of less than 50 and contour lines, roads and depth contours present on the underlying Garmin map will show through.You’ll still be able to see waypoints, tracks, POIs, etc. Use a DrawOrder of 50+ to keep the custom map on top of other imagery, as I did above.Others are reporting sluggish behavior for larger mapsets. Admittedly, I wasn’t going that fast (15 MPH tops), but I noticed no problems with redraws. I’ll also note that the Oregon was in a mesh pocket on the back of my pack, not the ideal spot for reception.

The red line is a track of the trail created by someone else, so I can’t vouch for the accuracy of that, but my own track lined up well with the USFS trail on the map, and had me on the proper side of the creek, so I was pretty pleased with my first attempt. You can see the results in the image to the left.Īccuracy is completely related to how well you georeference the image, but I was pretty pleased with the results. I immediately downloaded a US Forest Service topo (which often have greater FS road detail than USGS topos), transferred a portion to my Oregon, and hit the trail. Owners of the Garmin Colorado, Dakota and Oregon series got a nice surprise yesterday, when the company rolled out the ability to create a custom map image in Google Earth, opening the door to viewing aerial photos, USGS topos and park maps on your GPS.

Garmin custom maps