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. Most popular form of USGS Map


2. To avoid corrupt data!






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






4. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






5. Digital Elevation Model






6. A reference system (geographic coordinates)






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






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






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






10. 2 ______: 1. Files/records. 2. Database/collection of files.






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






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






13. Accuracy - reliability - responsibility.






14. Assigning location information to text & discourse.






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






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






17. Global Positioning System.






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






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






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






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






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






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






24. An assignment of geographic coordinates to locations.






25. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






26. Classes based on natural groupings through examination of histogram (good: minimizes differences bad: data range uneven)






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






28. Can not be made from other colors






29. 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.






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






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






32. A process of mathematical conversion.






33. Representative fraction






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






35. 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






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






37. Preserve Shape






38. Google Maps or Microsoft Bing.






39. Are made with GIS






40. When parallels & meridians intersect at right angles.






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






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






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






44. GIS is ________






45. A Complete frame






46. The nature of relationships & connectivity between them.






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






48. 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.






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






50. Points - Polygons - Lines