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






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






3. A reference system (geographic coordinates)






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






5. An assignment of geographic coordinates to locations.






6. Area of the Earth that is displayed in each image






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






8. 80 % of all information contain _________






9. 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.






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






11. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






12. Description by name: ex London






13. Digital Elevation Model






14. Contour lines never _______






15. When parallels & meridians intersect at right angles.






16. Blue - Green - Red - NIR....






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






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






19. Most popular form of USGS Map


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






21. Title - legend or key - grid system - distance scale - direction and compass rose






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






23. 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.






24. Can not be made from other colors






25. GIS is ________






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






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






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






29. Deliver location / topographic information.






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






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






32. Accuracy - reliability - responsibility.






33. Global Positioning System.






34. Geographic Coordinate System.






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






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






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






38. Symbol on a map used to show direction






39. Preserve Direction






40. 2 common _______: 1. Vector. 2. Raster.






41. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






42. Regulary spaced sample of points representing a surface.






43. 2 ______: 1. Files/records. 2. Database/collection of files.






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






45. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






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






48. The reverse of each other.






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






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