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. Digital Elevation Model






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






3. Essentials of DBMS: Each record has a ________






4. Are made with GIS






5. Preserve Shape






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






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






8. The nature of relationships & connectivity between them.






9. Google Maps or Microsoft Bing.






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






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






12. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






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






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






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






17. GIS is ________






18. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






19. Geographic Coordinate System.






20. 80 % of all information contain _________






21. 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.






22. Smoothing & Shape abstraction.






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






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






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






26. Description by name: ex London






27. When parallels & meridians intersect at right angles.






28. Sailors and pilots use these maps to navigate






29. Points - Polygons - Lines






30. Lines that connect points of equal value.






31. A reference system (geographic coordinates)






32. Most popular form of USGS Map


33. The ability to link files together.






34. 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.






35. Contour lines never _______






36. Preserve Direction






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






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






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






40. 2 ______: 1. Files/records. 2. Database/collection of files.






41. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






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






44. 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.






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






46. Understand spatial relations between landmarks>shortcuts.






47. The reverse of each other.






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






49. Can not be made from other colors






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