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






2. The 5 __________: TTCETH - 1. Triangle table 2. Triangle-Node table 3. Coordinate table 4. Triangle-Edge table 5. Hull-Edge table.






3. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






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






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






7. Points taken at regular intervals from the cumulative distribution function (CDF) of a random variable.






8. Precision of a measurement with respect to time






9. To avoid corrupt data!






10. Preserve Direction






11. The study of place names - origins - history & meanings.






12. The ability to link files together.






13. Representative fraction






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






15. Blue - Green - Red - NIR....






16. Description by name: ex London






17. When distances from the center of the projection to any other place on the map are uniform in all directions.






18. Data Modelling - Turning entities into complex objects (geometry - quality).






19. Symbol on a map used to show direction






20. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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






23. GIS is ________






24. GIS is not a ______






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






26. A line segment between 2 nodes -1 of which is a start node & the other an end node.






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






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






29. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






31. Accuracy - reliability - responsibility.






32. Global Positioning System.






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






34. When areas on a map maintain the same proportional relationship to the areas on the earth that they represent.






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






36. Files in the DB can be linked or joined using the _______






37. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






38. Are made with GIS






39. Geographic Coordinate System.






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






41. 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.






42. Google Maps or Microsoft Bing.






43. Can not be made from other colors






44. Preserve Shape






45. Contour lines never _______






46. 3 topological concepts: 1. Connectivity - arcs connect to each other at nodes. 2._______ - arcs that connect to surround an area define a polygon. 3. Contiguity - arcs have direction & left & right sides.






47. Sailors and pilots use these maps to navigate






48. A Complete frame






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






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