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






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






3. A Complete frame






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






5. Arcs only ___ at Nodes






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






7. Sailors and pilots use these maps to navigate






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






9. Digital Elevation Model






10. Regulary spaced sample of points representing a surface.






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






12. 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.






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






14. Blue - Green - Red - NIR....






15. Preserve Shape






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






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






18. 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.






19. Understand spatial relations between landmarks>shortcuts.






20. 2 ______: 1. Files/records. 2. Database/collection of files.






21. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






22. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






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






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






26. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






27. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






28. Accuracy - reliability - responsibility.






29. When parallels & meridians intersect at right angles.






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






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






32. 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






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






34. 2 common _______: 1. Vector. 2. Raster.






35. Explanatory list of symbols on a map






36. The nature of relationships & connectivity between them.






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






38. 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.






39. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






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






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






44. Relative to another known feature






45. A reference system (geographic coordinates)






46. Preserve Direction






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






48. A process of mathematical conversion.






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






50. Are made with GIS