Here are the rewritten terms:
1. Map - A representation of geographic information.
2. Map Update - The act of updating or refreshing a map with new data.
3. Update - The process of making changes or improvements to something.
4. Upgrade - To enhance or improve the features or capabilities of a product or system.
5. Navigation - The process of planning and following a route to reach a destination.
6. Navigation System - A technology that assists in determining and guiding a route.
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