GIS Quiz 7

Vocabulary List

1. Primary Data – Data collected directly from the real world (e.g., GPS, surveys).

2. Secondary Data – Data collected by others and reused (e.g., census data).

3. Geocoding – Converting street addresses into geographic coordinates.

4. Street Network Layer – A GIS layer containing street segments with address ranges.

5. GPS (Global Positioning System) – A satellite-based system for determining precise locations.

6. Satellite Constellation – The network of satellites used for GPS.

7. Triangulation – The process of determining location using multiple satellites.

8. U.S. Census Bureau – A federal agency that collects population and geographic data.

9. Census Geographies – The hierarchical system of geographic areas used by the U.S. Census (e.g., tracts, blocks).

10. Shapefile – A GIS file format used to store spatial features.

11. Positional Accuracy – The degree to which data is correctly located.

12. Topological Consistency – Ensures logical spatial relationships between features.

13. Attribute Accuracy – Ensures the correctness of non-spatial data.

14. Completeness – Measures whether all necessary data is present.

15. Null Value – A missing or unknown value in a dataset.

16. Metadata – Information about a dataset (e.g., source, accuracy, resolution).

17. Resolution – The level of detail in a dataset.

18. Logical Consistency – The internal correctness of a dataset.

19. Data Lineage – The history of a dataset, including its sources and modifications.