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






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






3. Essentials of DBMS: Each record has a ________






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






5. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






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






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






9. Understand spatial relations between landmarks>shortcuts.






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






11. 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.






12. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






13. Google Maps or Microsoft Bing.






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






15. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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






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






19. A reference system (geographic coordinates)






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






21. Digital Elevation Model






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






23. GIS is not a ______






24. Global Positioning System.






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






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






27. Maps are restricted to a __________.






28. Can not be made from other colors






29. Smoothing & Shape abstraction.






30. Geographic Coordinate System.






31. Provide information about a particular topic or theme.






32. Symbol on a map used to show direction






33. Assigning location information to text & discourse.






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






35. Precision of a measurement with respect to time






36. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






37. 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.






38. Sailors and pilots use these maps to navigate






39. Lines that connect points of equal value.






40. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






42. Accuracy - reliability - responsibility.






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






44. 80 % of all information contain _________






45. When parallels & meridians intersect at right angles.






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






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






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






49. 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.






50. Arcs only ___ at Nodes