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. 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.






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






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






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






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






6. 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.






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






8. Maps are restricted to a __________.






9. Preserve Direction






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






11. Precision of a measurement with respect to time






12. Provide information about a particular topic or theme.






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






14. Geographic Coordinate System.






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






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






17. The reverse of each other.






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






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






20. Lines that connect points of equal value.






21. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






22. Global Positioning System.






23. 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.






24. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






26. Blue - Green - Red - NIR....






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






28. Sailors and pilots use these maps to navigate






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






30. Explanatory list of symbols on a map






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






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






33. Regulary spaced sample of points representing a surface.






34. Arcs only ___ at Nodes






35. 80 % of all information contain _________






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






37. Symbol on a map used to show direction






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






39. A Complete frame






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






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






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






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






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






45. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






46. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






47. Representative fraction






48. Digital Elevation Model






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






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