GIS Quiz 8

Vocabulary List

1. Query – A request to extract data based on attribute or spatial conditions.

2. Multi-Clause Query – A query with multiple conditions (e.g., “Population > 1M AND Median Income > $50K”).

3. Attribute Query – A query selecting features based on their attribute values.

4. Spatial Query – A query selecting features based on their spatial relationships.

5. Clementini Operator – A spatial query method that excludes boundary-touching features.

6. Spatial Join – A method to combine attributes from different layers based on spatial relationships.

7. Inside Join – A join that assigns attributes from one feature to another if it is entirely inside it.

8. Distance Join – A join that assigns attributes based on the closest feature.

9. Cardinality – The relationship between records in a join (e.g., One-to-One, One-to-Many).

10. Summarized Join – A spatial join that aggregates multiple matches into summary statistics.

11. Intersects – A spatial relationship where features overlap in any way.

12. Touches – A spatial relationship where features share a boundary but don’t overlap.

13. Contains – A spatial relationship where one feature fully encloses another.

14. Within – A spatial relationship where one feature is fully enclosed by another.

15. Overlaps – A spatial relationship where features share part but not all of their area.

16. Equals – A spatial relationship where two features are identical.

17. Crosses – A spatial relationship where one feature partially overlaps another.

18. Kernel Density Estimation (KDE) – A technique for creating density maps.

19. Hot Spot Analysis – A statistical method to detect clusters of high or low values.

20. Getis-Ord Gi* – A statistic used in hot spot analysis to determine significant clustering.

21. Map Units – The measurement units used in a GIS dataset (e.g., meters, decimal degrees).

22. Attribute Table – A table containing data about spatial features.

23. Reprojection – Changing the coordinate system of a dataset.

24. Geographic Coordinate System (GCS) – A coordinate system based on latitude and longitude.