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






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






3. Essentials of DBMS: Each record has a ________






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






5. Understand spatial relations between landmarks>shortcuts.






6. An assignment of geographic coordinates to locations.






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






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






9. Lines that connect points of equal value.






10. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






11. Preserve Direction






12. 2 ______: 1. Files/records. 2. Database/collection of files.






13. Maps are restricted to a __________.






14. The reverse of each other.






15. 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.






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






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






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






19. Assigning location information to text & discourse.






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






21. Description by name: ex London






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






23. 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.






24. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






25. Geographic Coordinate System.






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






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






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






29. Points - Polygons - Lines






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






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






32. Global Positioning System.






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






34. The nature of relationships & connectivity between them.






35. 2 common _______: 1. Vector. 2. Raster.






36. Regulary spaced sample of points representing a surface.






37. Triangulated Irregular Network.






38. Deliver location / topographic information.






39. 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






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






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






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






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






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






45. Blue - Green - Red - NIR....






46. A reference system (geographic coordinates)






47. A Complete frame






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






49. Sailors and pilots use these maps to navigate






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