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. To avoid corrupt data!






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






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






4. Regulary spaced sample of points representing a surface.






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






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






7. 2 common _______: 1. Vector. 2. Raster.






8. Are made with GIS






9. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






10. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






11. Sailors and pilots use these maps to navigate






12. Can not be made from other colors






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






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






15. GIS is not a ______






16. 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.






17. GIS is ________






18. Digital Elevation Model






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






20. An assignment of geographic coordinates to locations.






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






22. Blue - Green - Red - NIR....






23. The reverse of each other.






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






25. Provide information about a particular topic or theme.






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






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






28. Where 2 lines/arcs intersect - an endpoint - or a point along a line.






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






30. The study of place names - origins - history & meanings.






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






32. 80 % of all information contain _________






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






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






35. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






36. Assigning location information to text & discourse.






37. A process of mathematical conversion.






38. Most popular form of USGS Map

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39. 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.






40. Accuracy - reliability - responsibility.






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






42. 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.






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






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






45. Preserve Shape






46. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






48. Contour lines never _______






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






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







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