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. Triangulated Irregular Network.






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






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






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






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






6. Are made with GIS






7. 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.






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






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






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






11. Accuracy - reliability - responsibility.






12. Lines that connect points of equal value.






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






14. Arcs only ___ at Nodes






15. Preserve Shape






16. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






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






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






20. GIS is not a ______






21. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






23. The reverse of each other.






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






25. Representative fraction






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






27. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






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






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






32. Provide information about a particular topic or theme.






33. Regulary spaced sample of points representing a surface.






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






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






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






37. Digital Elevation Model






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






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






40. GIS is ________






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






42. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






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






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






46. 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.






47. The nature of relationships & connectivity between them.






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






49. Blue - Green - Red - NIR....






50. 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.