GARMIN mapping units come with built-in, permanent basemaps that cannot be altered. These basemaps come in a variety of global designations (ie., Atlantic basemap).  Factory-installed basemaps cannot be altered.

The Pacific Autoroute Highway basemap includes Asia, Australia, and Oceania, and covers an area from E60 to E180 Longitude, S60 to N75 Latitude.

The standard map coverage includes:

1. Oceans, rivers, lakes and major streams
2. Principal cities and smaller cities and towns
3. Major and principal highways, regional arterials, and some local roads
4. Political boundaries (state and international borders)
5. Large Urban areas (greater than 50K)
6. More detailed coastline with many smaller islands
7. Railroads
8. Airports