A survey of the public. Usually organised by national governments to determine the characteristics of the population. For example, the UK has a decennial census (every ten years); the next one is scheduled for 2011.

TOP 10

1. travel guides

2. satellite navigation

3. gps

4. directions

5. route planner

6. satnav

7. atlas

8. postcodes

9. gis

10. compass

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