Test your basic knowledge |

GIS: Geographic Information Systems

Subject : it-skills
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Precision of a measurement with respect to time






2. Points - Polygons - Lines






3. DBMS used for: _______ - access - organize & edit.






4. Connect & travel between landmarks by moving thru space.






5. GIS is ________ - spatial analysis & dependent on the computer.






6. The 2 _____ in data modelling: 1. Database. 2. Data Storage.






7. The reverse of each other.






8. GIS is ________






9. Consists of F & E: 1. Features. 2. Entities.






10. Geographic Coordinate System.






11. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






12. Maps are restricted to a __________.






13. The 4 elements or ______: 1. Cell Value - each cell carries a value. 2. Cell size - this determines the resolution. 3. Raster bands - Can have single or multiple bands. 4. Spatial Reference - Raster data must have spatial reference.






14. Provide information about a particular topic or theme.






15. Real Things (trees - forests - cities etc).






16. Connectivity: ___________. 3 elements 1. Nodes & vertices define the shape of the arc. 2. Arcs have a from-node (or starting node) & a to-node (or ending-node). 3. Arcs only join at nodes.






17. Fixed entitites - Can only take a specific value (Ex. number of students in a class - anything that is counted and not measured)






18. Deliver location / topographic information.






19. The nature of relationships & connectivity between them.






20. A Complete frame






21. 2 common _______: 1. Vector. 2. Raster.






22. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






23. Regulary spaced sample of points representing a surface.






24. Converts what entities into objects in the computer 1. Geometry (points - lines - polygons). 2. Measurement of attributes. 3. Accuracy &/or error.






25. Shift in delivery (eg - require user interaction).






26. Understand spatial relations between landmarks>shortcuts.






27. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






28. The 4 types of ___________:SADD. 1. S - Shape: Conformal. 2. A - Area: Variant. 3. D - Direction: Preserved. 4. D - Distance: Variant.






29. Representative fraction






30. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






31. Classes based on natural groupings through examination of histogram (good: minimizes differences bad: data range uneven)






32. Lines that connect points of equal value.






33. People creating their own maps - on their own terms by combining elements of an existing toolset.






34. Identify unique points - patterns or features in space.






35. A reference system (geographic coordinates)






36. Triangulated Irregular Network.






37. Essentials of DBMS: Each record has a ________






38. The range of wavelengths sampled by a remote sensor.






39. User generated content (UGC). Volunteered geog. info (VGI). Professional vs amateur. Neogeography vs GIS.






40. 1. An array of regulary spaced cells or pixels. 2. Each cell holds attributes (values).






41. 80 % of all information contain _________






42. A data classification method that divides a set of attribute values into groups that contain an equal range of values






43. HAL - H-Human nature. A-Arbitrary/socially constructed. L-Loss of info (hiding variance within a class or group).






44. The smallest pixel size visible in an image - the limit of magnification






45. _________ of the Real World: (S&E - S&S - G&A) 1. Selection & Elimination. 2. Simplification & Smoothing. 3. Generalization & Aggregation.






46. To avoid corrupt data!






47. Assigning location information to text & discourse.






48. Preserve Shape






49. Symbol on a map used to show direction






50. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km