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






3. Contour lines never _______






4. Lines that connect points of equal value.






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






6. 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.






7. Precision of a measurement with respect to time






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






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






10. Can not be made from other colors






11. GIS is not a ______






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






13. To avoid corrupt data!






14. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






15. Symbol on a map used to show direction






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






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






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






19. The ability to link files together.






20. Relative to another known feature






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






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






23. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






24. An assignment of geographic coordinates to locations.






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






26. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






27. Regulary spaced sample of points representing a surface.






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






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






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






31. When areas on a map maintain the same proportional relationship to the areas on the earth that they represent.






32. Accuracy - reliability - responsibility.






33. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






34. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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






37. 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.






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






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






40. Most popular form of USGS Map


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






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






43. Provide information about a particular topic or theme.






44. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






45. Are made with GIS






46. Explanatory list of symbols on a map






47. 2 ______: 1. Files/records. 2. Database/collection of files.






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






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






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