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. Points - Polygons - Lines






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






3. Relative to another known feature






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






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






6. 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.






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






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






9. DBMS used for: _______ - access - organize & edit.






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






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






12. Representative fraction






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






14. Symbol on a map used to show direction






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






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






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






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






19. Lines that connect points of equal value.






20. Smoothing & Shape abstraction.






21. Geographic Coordinate System.






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






23. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






25. Provide information about a particular topic or theme.






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






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






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






29. An assignment of geographic coordinates to locations.






30. Regulary spaced sample of points representing a surface.






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






32. Deliver location / topographic information.






33. 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.






34. Accuracy - reliability - responsibility.






35. 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.






36. The nature of relationships & connectivity between them.






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






38. LN 1. L - Level Surfaces. 2. N - NAVD88.






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






40. Google Maps or Microsoft Bing.






41. Can not be made from other colors






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






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






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






45. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






46. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






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






49. Understand spatial relations between landmarks>shortcuts.






50. Global Positioning System.