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. Area of the Earth that is displayed in each image






2. Geographic Coordinate System.






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






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






5. Description by name: ex London






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






7. A tabular file containing rows and columns; descriptive attributes about some object such as a geographic feature are contained in each row






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






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






10. 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.






11. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






13. A Complete frame






14. Converts what entities into objects in the computer 1. Geometry (points - lines - polygons). 2. Measurement of attributes. 3. Accuracy &/or error.






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






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






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






18. 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.






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






20. Regulary spaced sample of points representing a surface.






21. A process of mathematical conversion.






22. Connect & travel between landmarks by moving thru space.






23. Points - Polygons - Lines






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






25. Precision of a measurement with respect to time






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






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






28. Accuracy - reliability - responsibility.






29. To avoid corrupt data!






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






31. Smoothing & Shape abstraction.






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






33. Representative fraction






34. Most popular form of USGS Map

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






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






37. The nature of relationships & connectivity between them.






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






39. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






40. Can not be made from other colors






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






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






43. 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






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






45. Maps are restricted to a __________.






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






47. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






49. Triangulated Irregular Network.






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