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






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






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






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






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






7. A tabular file containing rows and columns; descriptive attributes about some object such as a geographic feature are contained in each row






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






9. Accuracy - reliability - responsibility.






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






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






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






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






14. Can not be made from other colors






15. Essentials of DBMS: Each record has a ________






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






17. The ability to link files together.






18. Assigning location information to text & discourse.






19. Symbol on a map used to show direction






20. Representative fraction






21. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






23. Maps are restricted to a __________.






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






25. 2 common _______: 1. Vector. 2. Raster.






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






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






28. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






30. A reference system (geographic coordinates)






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






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






33. Explanatory list of symbols on a map






34. 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.






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






36. When parallels & meridians intersect at right angles.






37. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






38. 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.






39. 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.






40. The reverse of each other.






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






42. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






43. Relative to another known feature






44. GIS is ________






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






46. 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.






47. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






49. A process of mathematical conversion.






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