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






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






4. Most popular form of USGS Map

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5. 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.






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






7. 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.






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






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






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






11. Can not be made from other colors






12. Google Maps or Microsoft Bing.






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






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






15. 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.






16. Preserve Direction






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






18. Sailors and pilots use these maps to navigate






19. Smoothing & Shape abstraction.






20. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






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






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






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






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






26. Maps that show the absolute location of places and geographic features determined by a frame of reference - typically latitude and longitude






27. A reference system (geographic coordinates)






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






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






30. Digital Elevation Model






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






32. The nature of relationships & connectivity between them.






33. Preserve Shape






34. Essentials of DBMS: Each record has a ________






35. 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.






36. When parallels & meridians intersect at right angles.






37. To avoid corrupt data!






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






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






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






41. Regulary spaced sample of points representing a surface.






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






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






44. Explanatory list of symbols on a map






45. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






46. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






47. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






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






50. Description by name: ex London