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






2. The nature of relationships & connectivity between them.






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






4. GIS is not a ______






5. 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.






6. Blue - Green - Red - NIR....






7. Contour lines never _______






8. Maps are restricted to a __________.






9. A Complete frame






10. Essentials of DBMS: Each record has a ________






11. Most popular form of USGS Map

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






13. 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






14. Smoothing & Shape abstraction.






15. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






16. Are made with GIS






17. Arcs only ___ at Nodes






18. The reverse of each other.






19. When parallels & meridians intersect at right angles.






20. 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.






21. Relative to another known feature






22. Representative fraction






23. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






24. Global Positioning System.






25. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






27. Points - Polygons - Lines






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






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






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






31. An assignment of geographic coordinates to locations.






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






33. Preserve Shape






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






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






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






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






38. Can not be made from other colors






39. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






40. Description by name: ex London






41. The 2 _____ in data modelling: 1. Database. 2. Data Storage.






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






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






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






45. 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.






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






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






48. Points taken at regular intervals from the cumulative distribution function (CDF) of a random variable.






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






50. The ability to link files together.