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






2. Assigning location information to text & discourse.






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






4. Deliver location / topographic information.






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






6. Precision of a measurement with respect to time






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






8. Global Positioning System.






9. 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.






10. GIS is ________






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






12. GIS is not a ______






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






14. Explanatory list of symbols on a map






15. Blue - Green - Red - NIR....






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






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






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






19. Accuracy - reliability - responsibility.






20. Geographic Coordinate System.






21. 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.






22. Sailors and pilots use these maps to navigate






23. Symbol on a map used to show direction






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






25. Representative fraction






26. Points - Polygons - Lines






27. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






28. The ability to link files together.






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






30. Most popular form of USGS Map

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






32. 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.






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






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






35. Preserve Direction






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






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






38. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






39. The reverse of each other.






40. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






41. Triangulated Irregular Network.






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






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






44. To avoid corrupt data!






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






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






47. An assignment of geographic coordinates to locations.






48. 2 common _______: 1. Vector. 2. Raster.






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






50. Essentials of DBMS: Each record has a ________