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. 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.






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






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






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






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






6. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






8. Assigning location information to text & discourse.






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






10. Relative to another known feature






11. 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






12. Regulary spaced sample of points representing a surface.






13. GIS is ________






14. Deliver location / topographic information.






15. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






17. To avoid corrupt data!






18. Provide information about a particular topic or theme.






19. Sailors and pilots use these maps to navigate






20. GIS is not a ______






21. Global Positioning System.






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






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






24. The nature of relationships & connectivity between them.






25. 80 % of all information contain _________






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






27. A process of mathematical conversion.






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






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






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






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






32. Blue - Green - Red - NIR....






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






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






35. Precision of a measurement with respect to time






36. Arcs only ___ at Nodes






37. Points - Polygons - Lines






38. Description by name: ex London






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






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






41. The reverse of each other.






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






43. 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.






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






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






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






47. Most popular form of USGS Map


48. 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.






49. Preserve Direction






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