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






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






3. 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.






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






5. HAL - H-Human nature. A-Arbitrary/socially constructed. L-Loss of info (hiding variance within a class or group).






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






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






8. Regulary spaced sample of points representing a surface.






9. A reference system (geographic coordinates)






10. The nature of relationships & connectivity between them.






11. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






13. The reverse of each other.






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






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






16. Representative fraction






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






18. An assignment of geographic coordinates to locations.






19. Description by name: ex London






20. Smoothing & Shape abstraction.






21. Global Positioning System.






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






23. A Complete frame






24. Sailors and pilots use these maps to navigate






25. Explanatory list of symbols on a map






26. Accuracy - reliability - responsibility.






27. Understand spatial relations between landmarks>shortcuts.






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






29. Preserve Shape






30. The ability to link files together.






31. Deliver location / topographic information.






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






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






34. 80 % of all information contain _________






35. Maps are restricted to a __________.






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






37. Preserve Direction






38. 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






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






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






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






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






43. Points - Polygons - Lines






44. 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.






45. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






46. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






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






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






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