On most units, it's a pre-loaded and often updatable database on the unit. They're called POI (points-of-interest) databases and are generally one of the selling features of the GPS. "This GPS has a 6 million POI database" etc.
These databases coexist on the GPS with the actual map data itself.
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On most units, it's a pre-loaded and often updatable database on the unit. They're called POI (points-of-interest) databases and are generally one of the selling features of the GPS. "This GPS has a 6 million POI database" etc.
These databases coexist on the GPS with the actual map data itself.