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






2. Can not be made from other colors






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






4. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






5. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






7. Representative fraction






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






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






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






11. 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.






12. When parallels & meridians intersect at right angles.






13. A reference system (geographic coordinates)






14. Maps are restricted to a __________.






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






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






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






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






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






20. GIS is not a ______






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






22. Geographic Coordinate System.






23. Triangulated Irregular Network.






24. A Complete frame






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






26. 2 common _______: 1. Vector. 2. Raster.






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






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






29. The reverse of each other.






30. A map containing information on only one topic or theme.






31. 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






32. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






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






35. The 5 key concepts in Geography & GIS (LDDSN) 1. Location. 2. _________. 3. Distance. 4. Space. 5. Navigation.






36. Accuracy - reliability - responsibility.






37. Connect & travel between landmarks by moving thru space.






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






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






40. Global Positioning System.






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






42. Google Maps or Microsoft Bing.






43. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






44. An assignment of geographic coordinates to locations.






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






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






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






48. Most popular form of USGS Map

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49. Digital Elevation Model






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