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






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






3. Are made with GIS






4. Google Maps or Microsoft Bing.






5. When parallels & meridians intersect at right angles.






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






7. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






8. Maps are restricted to a __________.






9. Global Positioning System.






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






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






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






13. Preserve Direction






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






15. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






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






18. Regulary spaced sample of points representing a surface.






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






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






21. The ability to link files together.






22. 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






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






24. 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.






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






26. Explanatory list of symbols on a map






27. Smoothing & Shape abstraction.






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






29. Contour lines never _______






30. Lines that connect points of equal value.






31. Digital Elevation Model






32. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






34. 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.






35. 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.






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






37. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






38. A reference system (geographic coordinates)






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






40. Can assume all values between any two specific values. They are obtained by measuring.






41. The reverse of each other.






42. 2 ______: 1. Files/records. 2. Database/collection of files.






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






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






45. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






46. Relative to another known feature






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






48. Description by name: ex London






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






50. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km