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






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






4. Assigning location information to text & discourse.






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






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






7. Most popular form of USGS Map

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8. Lines that connect points of equal value.






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






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






11. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






12. GIS is not a ______






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






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






15. Provide information about a particular topic or theme.






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






17. Geographic Coordinate System.






18. Smoothing & Shape abstraction.






19. Understand spatial relations between landmarks>shortcuts.






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






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






22. Can not be made from other colors






23. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






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






26. Contour lines never _______






27. 2 ______: 1. Files/records. 2. Database/collection of files.






28. GIS is ________






29. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






30. 80 % of all information contain _________






31. Area of the Earth that is displayed in each image






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






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






34. Essentials of DBMS: Each record has a ________






35. Google Maps or Microsoft Bing.






36. Representative fraction






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






38. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






39. Regulary spaced sample of points representing a surface.






40. A process of mathematical conversion.






41. 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.






42. Explanatory list of symbols on a map






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






44. An assignment of geographic coordinates to locations.






45. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






48. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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