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






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






3. The ability to link files together.






4. 2 ______: 1. Files/records. 2. Database/collection of files.






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






6. To avoid corrupt data!






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






8. 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.






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






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






11. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






13. Regulary spaced sample of points representing a surface.






14. GIS is not a ______






15. A reference system (geographic coordinates)






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






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






18. Identify unique points - patterns or features in space.






19. Assigning location information to text & discourse.






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






21. Understand spatial relations between landmarks>shortcuts.






22. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






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






25. Google Maps or Microsoft Bing.






26. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






27. 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.






28. Shift in delivery (eg - require user interaction).






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






30. Representative fraction






31. GIS is ________






32. Sailors and pilots use these maps to navigate






33. The reverse of each other.






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






35. When parallels & meridians intersect at right angles.






36. 80 % of all information contain _________






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






38. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






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






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






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






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






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






45. Are made with GIS






46. Essentials of DBMS: Each record has a ________






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






48. Contour lines never _______






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






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