Bureau of Transportation Statistics (BTS)
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TABLE 1 - 2001 NPTS: Geo-Information and Accuracy Level

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Type of information Accuracy level
1. Pre-geocoding of home address (verified by respondent) Exact location of statistical ward
2. Pre-geocoding of work place address (verified by respondent) Exact location of statistical ward
3. Street address, postal number, and municipality; location using GIS and address databases Exact location of statistical ward
4. As in 3, but with some inaccuracies-manually controlled and verified Exact location of statistical ward
5. As in 3, but using a manual method for location Exact location of statistical ward
6. Insufficient information (e.g., name of store, postal code, etc.), but GIS or manual checks made possible exact location Exact location of statistical ward
7. Location to city center in small urban settlements (few cases) Exact location of statistical ward
8. As in 6, but 2 possible wards Approximate location (2 possible wards)
9. As in 6, but 3 possible wards Approximate location (3 possible wards)
10. As in 6, but 4 or more possible wards Inexact location (4 or more possible wards)
11. Insufficient information-only possible to locate municipality No location
12. Geocoding impossible or destination abroad No location