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. Maps are restricted to a __________.






2. Can not be made from other colors






3. 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.






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






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






6. To avoid corrupt data!






7. Precision of a measurement with respect to time






8. Assigning location information to text & discourse.






9. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






10. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






11. Sailors and pilots use these maps to navigate






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






13. GIS is not a ______






14. Understand spatial relations between landmarks>shortcuts.






15. 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.






16. Google Maps or Microsoft Bing.






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






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






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






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






21. The nature of relationships & connectivity between them.






22. 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.






23. A Complete frame






24. 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






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






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






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






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






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






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






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






32. Symbol on a map used to show direction






33. Description by name: ex London






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






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






36. Contour lines never _______






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






38. Application Programming Interfaces (increases access like my maps on google).






39. Global Positioning System.






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






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






42. The reverse of each other.






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






44. 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.






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






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






47. Smoothing & Shape abstraction.






48. Arcs only ___ at Nodes






49. Digital Elevation Model






50. Lines that connect points of equal value.







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