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






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






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






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






5. Maps are restricted to a __________.






6. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






8. Precision of a measurement with respect to time






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






10. Global Positioning System.






11. 2 common _______: 1. Vector. 2. Raster.






12. 2 ______: 1. Files/records. 2. Database/collection of files.






13. Digital Elevation Model






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






15. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






16. Deliver location / topographic information.






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






18. 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.






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






20. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






22. 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






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






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






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






26. Preserve Direction






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






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






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






30. A Complete frame






31. Google Maps or Microsoft Bing.






32. Assigning location information to text & discourse.






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






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






35. Triangulated Irregular Network.






36. Contour lines never _______






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






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






39. Understand spatial relations between landmarks>shortcuts.






40. Explanatory list of symbols on a map






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






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






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






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






45. 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.






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






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






48. Relative to another known feature






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






50. Arcs only ___ at Nodes