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






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






3. Accuracy - reliability - responsibility.






4. A process of mathematical conversion.






5. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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






8. Can not be made from other colors






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






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






11. Most popular form of USGS Map

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12. Smoothing & Shape abstraction.






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






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






15. Geographic Coordinate System.






16. GIS is ________






17. When parallels & meridians intersect at right angles.






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






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






20. Contour lines never _______






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






22. 2 common _______: 1. Vector. 2. Raster.






23. To avoid corrupt data!






24. Essentials of DBMS: Each record has a ________






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






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






27. The reverse of each other.






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






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






30. Maps are restricted to a __________.






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






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






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






34. Points - Polygons - Lines






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






36. Explanatory list of symbols on a map






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






38. 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.






39. 80 % of all information contain _________






40. Representative fraction






41. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






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






45. Regulary spaced sample of points representing a surface.






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






47. Arcs only ___ at Nodes






48. A reference system (geographic coordinates)






49. Precision of a measurement with respect to time






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