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. 80 % of all information contain _________






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






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






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






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






6. 2 ______: 1. Files/records. 2. Database/collection of files.






7. The nature of relationships & connectivity between them.






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






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






10. 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.






11. GIS is ________






12. The reverse of each other.






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






14. Representative fraction






15. When parallels & meridians intersect at right angles.






16. Explanatory list of symbols on a map






17. A Complete frame






18. 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.






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






21. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






24. Sailors and pilots use these maps to navigate






25. Blue - Green - Red - NIR....






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






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






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






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






30. Most popular form of USGS Map

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






32. GIS is not a ______






33. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






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






36. Arcs only ___ at Nodes






37. Deliver location / topographic information.






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






39. Smoothing & Shape abstraction.






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






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






42. Preserve Shape






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






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






45. 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






46. Precision of a measurement with respect to time






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






48. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






50. To avoid corrupt data!