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






2. 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.






3. Are made with GIS






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






5. 2 ______: 1. Files/records. 2. Database/collection of files.






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






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






8. 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.






9. Relative to another known feature






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






11. 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.






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






13. Maps are restricted to a __________.






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






15. A process of mathematical conversion.






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






17. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






19. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






20. Provide information about a particular topic or theme.






21. A Complete frame






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






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






24. 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.






25. An assignment of geographic coordinates to locations.






26. Preserve Shape






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






28. Explanatory list of symbols on a map






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






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






31. The nature of relationships & connectivity between them.






32. GIS is not a ______






33. Google Maps or Microsoft Bing.






34. Accuracy - reliability - responsibility.






35. Description by name: ex London






36. Assigning location information to text & discourse.






37. Preserve Direction






38. Points - Polygons - Lines






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






40. The ability to link files together.






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






42. Essentials of DBMS: Each record has a ________






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






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






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






46. Most popular form of USGS Map

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






48. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






50. A reference system (geographic coordinates)