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. 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.






2. Sailors and pilots use these maps to navigate






3. Most popular form of USGS Map






4. Geographic Coordinate System.






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






6. 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.






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






8. Can not be made from other colors






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






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






11. 2 ______: 1. Files/records. 2. Database/collection of files.






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






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






14. Blue - Green - Red - NIR....






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






16. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






18. Assigning location information to text & discourse.






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






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






21. The nature of relationships & connectivity between them.






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






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






24. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






26. The range of wavelengths sampled by a remote sensor.






27. Contour lines never _______






28. Lines that connect points of equal value.






29. Symbol on a map used to show direction






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






31. Provide information about a particular topic or theme.






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






33. Accuracy - reliability - responsibility.






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






35. Are made with GIS






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






37. A Complete frame






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






40. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






41. Explanatory list of symbols on a map






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






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






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






45. When parallels & meridians intersect at right angles.






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






47. A process of mathematical conversion.






48. Regulary spaced sample of points representing a surface.






49. GIS is ________






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