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






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






3. An assignment of geographic coordinates to locations.






4. When parallels & meridians intersect at right angles.






5. Most popular form of USGS Map

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6. Lines that connect points of equal value.






7. 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.






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






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






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






11. Digital Elevation Model






12. 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.






13. Preserve Shape






14. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






16. Relative to another known feature






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






18. Precision of a measurement with respect to time






19. Assigning location information to text & discourse.






20. 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.






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






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






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






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






25. Triangulated Irregular Network.






26. Essentials of DBMS: Each record has a ________






27. Accuracy - reliability - responsibility.






28. Smoothing & Shape abstraction.






29. Provide information about a particular topic or theme.






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






31. A reference system (geographic coordinates)






32. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






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






35. Global Positioning System.






36. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






37. Preserve Direction






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






39. Symbol on a map used to show direction






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






41. To avoid corrupt data!






42. GIS is ________






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






44. Description by name: ex London






45. Arcs only ___ at Nodes






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






47. The reverse of each other.






48. Explanatory list of symbols on a map






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






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