[Georeferenced Rasters to a Garmin Colorado]

You can't.

 

The units don't accept raster maps.

Umm... You might add "...yet" because the 400i and 400c use satellite imagery as their basemap, so there is strong speculation that the Colorados will eventually support raster maps.

 

Thanks for the replies everybody. Yeah I guess I got confused about that. I have a 400t and was sure I'd read somewhere about adding rasters to it, but I guess I was reading about the i or the c models instead. Hopefully in the future it'll work since I'm lucky enough to have Arcmap.

[Georeferenced Rasters to a Garmin Colorado]

Yeah, this might be a dumb question, but I'm new to handheld GPS units and I can't figure it out. How do I get a raster image onto my Colorado and use it as a basemap?

 

I have access to lots of great data from work along with licenses for ArcMap and Autocad Civil3d and I'm quite fluent in those so I was hoping to be able to create my own custom maps to use on the Garmin. I can export about any format including Geotiffs, Sids, ECW's, etc.

 

Unfortunately, I've found the Garmin documentation to be rather poor at best though the unit itself seems quite nice.

 

Thanks!