I downloaded the "World shaded relief kmz" file from GpsFileDepot and tried to import it into BaseCamp 3.2.2 (MAC version) but get an error message:
"/Users/shenking/Downloads/277-6285-r_world.kmz" is not a valid Garmin Custom Map file and could not be opened."
I posted the same question in GpsfileDepot forum (http://forums.gpsfiledepot.com/index.php/topic,2466.0.html) where one other person has seen similar problem with the WIN7 64 BaseCamp 3.2.2.
Have you encountered this or have a solution? Your help is much appreciated.