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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. A tabular file containing rows and columns; descriptive attributes about some object such as a geographic feature are contained in each row






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






3. The ability to link files together.






4. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






5. Blue - Green - Red - NIR....






6. Deliver location / topographic information.






7. Accuracy - reliability - responsibility.






8. Can not be made from other colors






9. 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.






10. LN 1. L - Level Surfaces. 2. N - NAVD88.






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






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






13. Preserve Shape






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






15. Points - Polygons - Lines






16. Sailors and pilots use these maps to navigate






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






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






19. GIS is not a ______






20. A 3-D frame of reference (model of the earth) used to determine surface locations.






21. Defined by NOIR NOIR N-Nominal - qualitive data. O-Ordinal - order or ranking. I-Interval - numeric scale - arbitrary units. R - Ratio - fixed origin - continuous scale.






22. Where 2 lines/arcs intersect - an endpoint - or a point along a line.






23. Description by name: ex London






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






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






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






27. To avoid corrupt data!






28. Precision of a measurement with respect to time






29. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






30. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






33. Triangulated Irregular Network.






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






35. Can assume all values between any two specific values. They are obtained by measuring.






36. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






37. Provide information about a particular topic or theme.






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






39. Contour lines never _______






40. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






41. Lines that connect points of equal value.






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






43. 1. E - Ellipsoid dimensions. 2. D - Datum origin. 3. A - Angular alignment.






44. Google Maps or Microsoft Bing.






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






46. Symbol on a map used to show direction






47. Arcs only ___ at Nodes






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






49. The reverse of each other.






50. Smoothing & Shape abstraction.







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