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






2. Points - Polygons - Lines






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






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






5. Data Modelling - Turning entities into complex objects (geometry - quality).






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






7. Are made with GIS






8. 2 common _______: 1. Vector. 2. Raster.






9. Preserve Shape






10. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






11. GIS is ________






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






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






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






15. Symbol on a map used to show direction






16. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






17. A process of mathematical conversion.






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






19. 2 ______: 1. Files/records. 2. Database/collection of files.






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






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






22. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






23. An assignment of geographic coordinates to locations.






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






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






26. The nature of relationships & connectivity between them.






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






28. Can not be made from other colors






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






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






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






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






33. A reference system (geographic coordinates)






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






35. 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.






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






37. Accuracy - reliability - responsibility.






38. Blue - Green - Red - NIR....






39. When parallels & meridians intersect at right angles.






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






41. Preserve Direction






42. 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.






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






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






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






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






47. 80 % of all information contain _________






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






49. Regulary spaced sample of points representing a surface.






50. To avoid corrupt data!