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






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






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






4. Provide information about a particular topic or theme.






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






6. Can not be made from other colors






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






8. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






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






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






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






14. When parallels & meridians intersect at right angles.






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






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






17. The nature of relationships & connectivity between them.






18. Representative fraction






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






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






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






22. The reverse of each other.






23. 2 common _______: 1. Vector. 2. Raster.






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






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






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






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






28. 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.






29. Preserve Direction






30. A process of mathematical conversion.






31. 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.






32. Triangulated Irregular Network.






33. 2 ______: 1. Files/records. 2. Database/collection of files.






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






35. Contour lines never _______






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






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






38. Most popular form of USGS Map

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39. Explanatory list of symbols on a map






40. Points - Polygons - Lines






41. Essentials of DBMS: Each record has a ________






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






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






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






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






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






49. Symbol on a map used to show direction






50. Global Positioning System.