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. Identify unique points - patterns or features in space.






2. Provide information about a particular topic or theme.






3. Essentials of DBMS: Each record has a ________






4. 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.






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






6. To avoid corrupt data!






7. 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






8. An assignment of geographic coordinates to locations.






9. Geographic Coordinate System.






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






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






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






13. 2 common _______: 1. Vector. 2. Raster.






14. When distances from the center of the projection to any other place on the map are uniform in all directions.






15. Explanatory list of symbols on a map






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






17. Representative fraction






18. Maps are restricted to a __________.






19. The reverse of each other.






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






21. Regulary spaced sample of points representing a surface.






22. Description by name: ex London






23. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






25. 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.






26. 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.






27. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






28. Are made with GIS






29. Most popular form of USGS Map

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30. The 5 __________: TTCETH - 1. Triangle table 2. Triangle-Node table 3. Coordinate table 4. Triangle-Edge table 5. Hull-Edge table.






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






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






33. Sailors and pilots use these maps to navigate






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






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






36. Triangulated Irregular Network.






37. A reference system (geographic coordinates)






38. Arcs only ___ at Nodes






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






40. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






42. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






44. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






46. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






47. Preserve Direction






48. Symbol on a map used to show direction






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






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