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. Preserve Direction






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






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






4. Most popular form of USGS Map

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






6. Assigning location information to text & discourse.






7. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






8. Contour lines never _______






9. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






11. 2 ______: 1. Files/records. 2. Database/collection of files.






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






13. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






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






16. Digital Elevation Model






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






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






19. An assignment of geographic coordinates to locations.






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






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






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






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






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






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






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






27. Understand spatial relations between landmarks>shortcuts.






28. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






29. GIS is ________






30. 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.






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






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






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






34. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






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






37. A Complete frame






38. Description by name: ex London






39. Preserve Shape






40. Arcs only ___ at Nodes






41. 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.






42. 80 % of all information contain _________






43. Relative to another known feature






44. Triangulated Irregular Network.






45. To avoid corrupt data!






46. The nature of relationships & connectivity between them.






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






48. GIS is not a ______






49. Sailors and pilots use these maps to navigate






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