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






2. Lines that connect points of equal value.






3. Accuracy - reliability - responsibility.






4. Maps are restricted to a __________.






5. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






6. The 5 key concepts in Geography & GIS (LDDSN) 1. Location. 2. _________. 3. Distance. 4. Space. 5. Navigation.






7. Assigning location information to text & discourse.






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






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






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






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






12. Representative fraction






13. A map containing information on only one topic or theme.






14. Contour lines never _______






15. Sailors and pilots use these maps to navigate






16. An assignment of geographic coordinates to locations.






17. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






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






20. Thematic map that uses dots to represent the frequency of a variable in a given area.






21. 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






22. Deliver location / topographic information.






23. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






24. 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.






25. Smoothing & Shape abstraction.






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






27. Points - Polygons - Lines






28. GIS is ________






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






30. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






31. 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.






32. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






33. Blue - Green - Red - NIR....






34. Understand spatial relations between landmarks>shortcuts.






35. Google Maps or Microsoft Bing.






36. 80 % of all information contain _________






37. Description by name: ex London






38. 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.






39. The 5 components of a TIN: NETHT - 1. Nodes 2. Edges 3. Triangles 4. ___ 5. Topology.






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






41. Triangulated Irregular Network.






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






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






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






45. A Complete frame






46. Geographic Coordinate System.






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






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






49. 2 ______: 1. Files/records. 2. Database/collection of files.






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