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. 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.






2. The reverse of each other.






3. A reference system (geographic coordinates)






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






5. 2 common _______: 1. Vector. 2. Raster.






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






7. GIS is ________






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






9. Symbol on a map used to show direction






10. Can not be made from other colors






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






12. Accuracy - reliability - responsibility.






13. 2 ______: 1. Files/records. 2. Database/collection of files.






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






15. 80 % of all information contain _________






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






17. 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.






18. Google Maps or Microsoft Bing.






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






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






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






22. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






23. Maps are restricted to a __________.






24. 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






25. 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.






26. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






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






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






30. Geographic Coordinate System.






31. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






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






34. Sailors and pilots use these maps to navigate






35. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






36. Understand spatial relations between landmarks>shortcuts.






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






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






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






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






41. The ability to link files together.






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






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






44. Description by name: ex London






45. Essentials of DBMS: Each record has a ________






46. Arcs only ___ at Nodes






47. To avoid corrupt data!






48. When parallels & meridians intersect at right angles.






49. Preserve Direction






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