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. 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.






2. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






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






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






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






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






8. Triangulated Irregular Network.






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






10. Sailors and pilots use these maps to navigate






11. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






12. Essentials of DBMS: Each record has a ________






13. 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.






14. 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






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






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






17. Deliver location / topographic information.






18. Symbol on a map used to show direction






19. Preserve Shape






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






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






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






23. GIS is ________






24. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






26. A process of mathematical conversion.






27. Preserve Direction






28. The nature of relationships & connectivity between them.






29. Can not be made from other colors






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






31. Understand spatial relations between landmarks>shortcuts.






32. The ability to link files together.






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






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






35. Description by name: ex London






36. Are made with GIS






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






38. Relative to another known feature






39. Arcs only ___ at Nodes






40. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






42. To avoid corrupt data!






43. Accuracy - reliability - responsibility.






44. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






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






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






48. Google Maps or Microsoft Bing.






49. GIS is not a ______






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