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. Real Things (trees - forests - cities etc).






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






3. Regulary spaced sample of points representing a surface.






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






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






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






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






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






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






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






11. Maps are restricted to a __________.






12. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






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






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






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






17. When parallels & meridians intersect at right angles.






18. Contour lines never _______






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






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






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






22. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






23. Lines that connect points of equal value.






24. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






26. 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.






27. 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.






28. Explanatory list of symbols on a map






29. Points - Polygons - Lines






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






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






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






33. A process of mathematical conversion.






34. A reference system (geographic coordinates)






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






36. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






37. Identify unique points - patterns or features in space.






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






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






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






41. 2 common _______: 1. Vector. 2. Raster.






42. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






43. Townships were six miles square - and were subdivided into 36 sections - each section consisting of one square mile. One section of each township was set aside to support public education - and the remaining sections were to be sold at public auction






44. Preserve Direction






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






46. GIS is ________






47. An assignment of geographic coordinates to locations.






48. Preserve Shape






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






50. Digital Elevation Model