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






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






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






4. Digital Elevation Model






5. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






6. 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.






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






8. Regulary spaced sample of points representing a surface.






9. Relative to another known feature






10. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






12. Description by name: ex London






13. Deliver location / topographic information.






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






15. Triangulated Irregular Network.






16. Can not be made from other colors






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






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






19. Preserve Direction






20. GIS is not a ______






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






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






23. Geographic Coordinate System.






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






25. 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






26. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






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






29. Sailors and pilots use these maps to navigate






30. 2 common _______: 1. Vector. 2. Raster.






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






32. The ability to link files together.






33. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






35. User generated content (UGC). Volunteered geog. info (VGI). Professional vs amateur. Neogeography vs GIS.






36. 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.






37. Symbol on a map used to show direction






38. Blue - Green - Red - NIR....






39. A reference system (geographic coordinates)






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






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






42. 2 ______: 1. Files/records. 2. Database/collection of files.






43. When parallels & meridians intersect at right angles.






44. Contour lines never _______






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






46. Accuracy - reliability - responsibility.






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






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






49. Essentials of DBMS: Each record has a ________






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