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. Arcs only ___ at Nodes






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






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






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






5. To avoid corrupt data!






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






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






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






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






10. The ability to link files together.






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






12. Digital Elevation Model






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






14. A Complete frame






15. Geographic Coordinate System.






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






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






18. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






19. Essentials of DBMS: Each record has a ________






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






21. 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.






22. 2 ______: 1. Files/records. 2. Database/collection of files.






23. Are made with GIS






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






25. GIS is not a ______






26. Contour lines never _______






27. Can not be made from other colors






28. Most popular form of USGS Map


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






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






31. Accuracy - reliability - responsibility.






32. Explanatory list of symbols on a map






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






34. 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.






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






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






37. 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






38. Google Maps or Microsoft Bing.






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






40. Lines that connect points of equal value.






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






42. 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.






43. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






44. Preserve Direction






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






46. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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






49. Representative fraction






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