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






2. 80 % of all information contain _________






3. Can not be made from other colors






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






5. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






6. Description by name: ex London






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






8. Relative to another known feature






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






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






11. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






12. Maps are restricted to a __________.






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






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






15. To avoid corrupt data!






16. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






17. Application Programming Interfaces (increases access like my maps on google).






18. 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.






19. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






20. Maps that show the absolute location of places and geographic features determined by a frame of reference - typically latitude and longitude






21. Blue - Green - Red - NIR....






22. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






24. Google Maps or Microsoft Bing.






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






26. Assigning location information to various media (photos - video - music).






27. Geographic Coordinate System.






28. Townships were six miles square - and were subdivided into 36 sections - each section consisting of one square mile. One section of each township was set aside to support public education - and the remaining sections were to be sold at public auction






29. Arcs only ___ at Nodes






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






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






32. Contour lines never _______






33. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






34. Accuracy - reliability - responsibility.






35. Uses coordinates (X -Y) to represent spatial features. Scale matters involve what Polygons<>points. Polygons<>lines.






36. Representative fraction






37. The acquisition of data about Earth's surface from a satellite orbiting the planet or other long-distance methods.






38. Global Positioning System.






39. Points - Polygons - Lines






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






41. The 3 _____: 1. True. 2. Magnetic. 3. Grid.






42. Triangulated Irregular Network.






43. 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.






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






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






46. The ability to link files together.






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






48. Preserve Shape






49. Smoothing & Shape abstraction.






50. Most popular form of USGS Map

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