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. 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






2. Regulary spaced sample of points representing a surface.






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






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. A process of mathematical conversion.






6. Maps are restricted to a __________.






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






8. Blue - Green - Red - NIR....






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






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






11. A reference system (geographic coordinates)






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






13. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






14. Smoothing & Shape abstraction.






15. Can not be made from other colors






16. Google Maps or Microsoft Bing.






17. Essentials of DBMS: Each record has a ________






18. The reverse of each other.






19. 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.






20. Representative fraction






21. Deliver location / topographic information.






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






23. To avoid corrupt data!






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






25. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






28. 2 common _______: 1. Vector. 2. Raster.






29. GIS is not a ______






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






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






32. Most popular form of USGS Map

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






34. Contour lines never _______






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






36. Triangulated Irregular Network.






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






38. The ability to link files together.






39. Accuracy - reliability - responsibility.






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






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






42. Precision of a measurement with respect to time






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






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






45. 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.






46. A Complete frame






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






48. Global Positioning System.






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






50. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.