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. Contour lines never _______






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






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






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






5. 80 % of all information contain _________






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






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






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






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






10. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






11. 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.






12. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






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






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






17. Most popular form of USGS Map

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18. 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






19. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






20. Sailors and pilots use these maps to navigate






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






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






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






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






25. Understand spatial relations between landmarks>shortcuts.






26. Explanatory list of symbols on a map






27. Deliver location / topographic information.






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






29. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






30. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






31. Application Programming Interfaces (increases access like my maps on google).






32. Preserve Shape






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






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






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






36. Global Positioning System.






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






38. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






40. A Complete frame






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






42. Regulary spaced sample of points representing a surface.






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






44. Points - Polygons - Lines






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






46. GIS is not a ______






47. A reference system (geographic coordinates)






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






49. 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.






50. Maps are restricted to a __________.