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. 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.






2. Preserve Shape






3. Assigning location information to various media (photos - video - music).






4. Lines that connect points of equal value.






5. Geographic Coordinate System.






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






7. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






8. 2 ______: 1. Files/records. 2. Database/collection of files.






9. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






10. Representative fraction






11. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






12. An assignment of geographic coordinates to locations.






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






14. A process of mathematical conversion.






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






16. Arcs only ___ at Nodes






17. 2 common _______: 1. Vector. 2. Raster.






18. 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.






19. Are made with GIS






20. Relative to another known feature






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






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






23. A Complete frame






24. A reference system (geographic coordinates)






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






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






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






28. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






29. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






31. Precision of a measurement with respect to time






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






33. Description by name: ex London






34. Symbol on a map used to show direction






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






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






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






38. The reverse of each other.






39. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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






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






43. 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






44. Deliver location / topographic information.






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






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






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






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






49. Maps are restricted to a __________.






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






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