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. Accuracy - reliability - responsibility.






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






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






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






5. Application Programming Interfaces (increases access like my maps on google).






6. When parallels & meridians intersect at right angles.






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






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






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






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






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






12. 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.






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






14. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






16. 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






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






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






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






20. Lines that connect points of equal value.






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






22. Representative fraction






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






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






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






26. 2 ______: 1. Files/records. 2. Database/collection of files.






27. Global Positioning System.






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






29. Triangulated Irregular Network.






30. Can not be made from other colors






31. To avoid corrupt data!






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






33. Explanatory list of symbols on a map






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






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






36. 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.






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






38. 2 common _______: 1. Vector. 2. Raster.






39. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






40. Google Maps or Microsoft Bing.






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






42. Sailors and pilots use these maps to navigate






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






44. Smoothing & Shape abstraction.






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






46. A Complete frame






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






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






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






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