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






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






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






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






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






6. 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.






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






8. The reverse of each other.






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






10. Sailors and pilots use these maps to navigate






11. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






12. A process of mathematical conversion.






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






14. Preserve Shape






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






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






17. Regulary spaced sample of points representing a surface.






18. A Complete frame






19. Contour lines never _______






20. Assigning location information to text & discourse.






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






22. Digital Elevation Model






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






24. 2 ______: 1. Files/records. 2. Database/collection of files.






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






26. The ability to link files together.






27. Explanatory list of symbols on a map






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






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






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






31. 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.






32. A map containing information on only one topic or theme.






33. Blue - Green - Red - NIR....






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






35. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






37. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






38. Geographic Coordinate System.






39. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






40. Global Positioning System.






41. Deliver location / topographic information.






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






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






44. The nature of relationships & connectivity between them.






45. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






46. Symbol on a map used to show direction






47. To avoid corrupt data!






48. Provide information about a particular topic or theme.






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






50. Can not be made from other colors