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. GIS is not a ______






2. Description by name: ex London






3. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






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






6. 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.






7. When parallels & meridians intersect at right angles.






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






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






10. Triangulated Irregular Network.






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






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






13. 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.






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






15. Preserve Direction






16. The ability to link files together.






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






18. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






19. Provide information about a particular topic or theme.






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






21. Accuracy - reliability - responsibility.






22. Regulary spaced sample of points representing a surface.






23. Relative to another known feature






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






25. 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.






26. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






28. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






29. A Complete frame






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






31. To avoid corrupt data!






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






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






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






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






36. Digital Elevation Model






37. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






39. Google Maps or Microsoft Bing.






40. A process of mathematical conversion.






41. Lines that connect points of equal value.






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






43. An assignment of geographic coordinates to locations.






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






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






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






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






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






49. Understand spatial relations between landmarks>shortcuts.






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