What is the concept behind exporting maps to GPS navigators from a Google Map or Open Street Map? Is there such a thing in the first place? Is there a standardized GPS format which will allow the exporting/importing of coordinates to all the GPS navigators?
Thanks!
GPX (called gps exchange) is a common format created (i think) by Garmin. Not all programs (ArcGIS) use it but it can be handily converted to a kml/kmz (keyhole aka Google Earth), and vice-versa. I have found that moving geodatabases between GIS editors, GPS navigators, and GPS handheld units to be most easily accomplished using a program that converts gpx to kml.
tl;dr There is no one format. There are two easily interchangeable formats, GPX and KML.