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. Relative to another known feature






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






3. Precision of a measurement with respect to time






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






5. Description by name: ex London






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






7. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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. Symbol on a map used to show direction






10. Provide information about a particular topic or theme.






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






12. 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.






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






14. The nature of relationships & connectivity between them.






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






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






17. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






19. Google Maps or Microsoft Bing.






20. Assigning location information to text & discourse.






21. Deliver location / topographic information.






22. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






23. 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.






24. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






26. A reference system (geographic coordinates)






27. Essentials of DBMS: Each record has a ________






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






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






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






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






32. To avoid corrupt data!






33. _________ of the Real World: (S&E - S&S - G&A) 1. Selection & Elimination. 2. Simplification & Smoothing. 3. Generalization & Aggregation.






34. The ability to link files together.






35. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






36. Title - legend or key - grid system - distance scale - direction and compass rose






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






38. Regulary spaced sample of points representing a surface.






39. Are made with GIS






40. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






41. 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.






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






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






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






45. Can not be made from other colors






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






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






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






49. The 5 components of a TIN: NETHT - 1. Nodes 2. Edges 3. Triangles 4. ___ 5. Topology.






50. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.