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. Understand spatial relations between landmarks>shortcuts.






2. Preserve Shape






3. Google Maps or Microsoft Bing.






4. Lines that connect points of equal value.






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






6. An assignment of geographic coordinates to locations.






7. Provide information about a particular topic or theme.






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






9. Arcs only ___ at Nodes






10. 2 ______: 1. Files/records. 2. Database/collection of files.






11. Representative fraction






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






13. Essentials of DBMS: Each record has a ________






14. Description by name: ex London






15. 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.






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






17. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






18. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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






21. Deliver location / topographic information.






22. Contour lines never _______






23. Precision of a measurement with respect to time






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






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






26. Maps that show the absolute location of places and geographic features determined by a frame of reference - typically latitude and longitude






27. Maps are restricted to a __________.






28. Points - Polygons - Lines






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






30. Can not be made from other colors






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






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






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






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






35. The reverse of each other.






36. Digital Elevation Model






37. Are made with GIS






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






39. Global Positioning System.






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






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






42. 2 common _______: 1. Vector. 2. Raster.






43. The ability to link files together.






44. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






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






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






47. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






48. 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.






49. Symbol on a map used to show direction






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