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. Precision of a measurement with respect to time






2. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






3. Can not be made from other colors






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






5. Triangulated Irregular Network.






6. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






8. 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.






9. Relative to another known feature






10. A reference system (geographic coordinates)






11. Explanatory list of symbols on a map






12. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






13. Regulary spaced sample of points representing a surface.






14. The nature of relationships & connectivity between them.






15. Understand spatial relations between landmarks>shortcuts.






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






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






18. Lines that connect points of equal value.






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






20. Global Positioning System.






21. Contour lines never _______






22. Preserve Direction






23. Arcs only ___ at Nodes






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






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






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






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






28. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






30. The reverse of each other.






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






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






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






34. The ability to link files together.






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






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






37. When parallels & meridians intersect at right angles.






38. Maps are restricted to a __________.






39. GIS is ________






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






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






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






43. Maps that show the absolute location of places and geographic features determined by a frame of reference - typically latitude and longitude






44. An assignment of geographic coordinates to locations.






45. Essentials of DBMS: Each record has a ________






46. GIS is not a ______






47. 80 % of all information contain _________






48. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






50. 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.