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






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






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






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






5. Provide information about a particular topic or theme.






6. The nature of relationships & connectivity between them.






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






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






9. Regulary spaced sample of points representing a surface.






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






11. 80 % of all information contain _________






12. 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.






13. Relative to another known feature






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






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






16. GIS is ________






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






18. Are made with GIS






19. Understand spatial relations between landmarks>shortcuts.






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






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






22. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






23. Most popular form of USGS Map

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24. Arcs only ___ at Nodes






25. To avoid corrupt data!






26. Precision of a measurement with respect to time






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






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






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






30. Deliver location / topographic information.






31. Contour lines never _______






32. 2 common _______: 1. Vector. 2. Raster.






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






34. Digital Elevation Model






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






36. Smoothing & Shape abstraction.






37. When parallels & meridians intersect at right angles.






38. Sailors and pilots use these maps to navigate






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






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






41. Points - Polygons - Lines






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






43. A process of mathematical conversion.






44. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






46. Essentials of DBMS: Each record has a ________






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






48. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






49. 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.






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