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. 80 % of all information contain _________






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






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






4. 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.






5. GIS is not a ______






6. 2 ______: 1. Files/records. 2. Database/collection of files.






7. Map in which some thematic mapping variable is substituted for area (like a graph in a map)






8. 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.






9. GIS is ________






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






11. 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.






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






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






14. Blue - Green - Red - NIR....






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






16. Maps are restricted to a __________.






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






18. A Complete frame






19. When parallels & meridians intersect at right angles.






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






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






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






23. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






25. Provide information about a particular topic or theme.






26. The reverse of each other.






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






28. Assigning location information to text & discourse.






29. Can not be made from other colors






30. A process of mathematical conversion.






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






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






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






34. To avoid corrupt data!






35. Preserve Direction






36. Smoothing & Shape abstraction.






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






38. Are made with GIS






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






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






41. Explanatory list of symbols on a map






42. Arcs only ___ at Nodes






43. Regulary spaced sample of points representing a surface.






44. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






45. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






46. Digital Elevation Model






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






48. Sailors and pilots use these maps to navigate






49. Precision of a measurement with respect to time






50. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.