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






2. Relative to another known feature






3. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






4. Representative fraction






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






6. The ability to link files together.






7. Points - Polygons - Lines






8. Maps are restricted to a __________.






9. Preserve Direction






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






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






12. Regulary spaced sample of points representing a surface.






13. Assigning location information to text & discourse.






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






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






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






17. 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






18. 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.






19. Are made with GIS






20. An assignment of geographic coordinates to locations.






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






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






23. To avoid corrupt data!






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






25. 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.






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






27. 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.






28. Deliver location / topographic information.






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






30. Can not be made from other colors






31. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






33. 80 % of all information contain _________






34. Geographic Coordinate System.






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






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






37. Triangulated Irregular Network.






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






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






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






41. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






43. A Complete frame






44. Contour lines never _______






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






46. Lines that connect points of equal value.






47. Digital Elevation Model






48. Global Positioning System.






49. Provide information about a particular topic or theme.






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