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. When parallels & meridians intersect at right angles.






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






3. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






4. 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.






5. Understand spatial relations between landmarks>shortcuts.






6. 1. E - Ellipsoid dimensions. 2. D - Datum origin. 3. A - Angular alignment.






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






8. Symbol on a map used to show direction






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






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






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






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






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






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






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






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






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






18. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






19. Relative to another known feature






20. 80 % of all information contain _________






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






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






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






24. Application Programming Interfaces (increases access like my maps on google).






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






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






27. Points - Polygons - Lines






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






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






30. Provide information about a particular topic or theme.






31. Most popular form of USGS Map

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32. Global Positioning System.






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






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






35. An assignment of geographic coordinates to locations.






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






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. 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






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






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






41. Google Maps or Microsoft Bing.






42. Digital Elevation Model






43. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






44. Sailors and pilots use these maps to navigate






45. Preserve Shape






46. The nature of relationships & connectivity between them.






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






48. Smoothing & Shape abstraction.






49. Essentials of DBMS: Each record has a ________






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







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