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. GIS is not a ______






2. Points - Polygons - Lines






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






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






5. The reverse of each other.






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






7. 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.






8. Representative fraction






9. 80 % of all information contain _________






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






11. A reference system (geographic coordinates)






12. Google Maps or Microsoft Bing.






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






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






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






16. Are made with GIS






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






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






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






20. Blue - Green - Red - NIR....






21. Precision of a measurement with respect to time






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






23. When parallels & meridians intersect at right angles.






24. 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.






25. Symbol on a map used to show direction






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






27. Digital Elevation Model






28. Lines that connect points of equal value.






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






30. Sailors and pilots use these maps to navigate






31. Can not be made from other colors






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






33. Provide information about a particular topic or theme.






34. The acquisition of data about Earth's surface from a satellite orbiting the planet or other long-distance methods.






35. 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.






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






37. To avoid corrupt data!






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






39. A process of mathematical conversion.






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






41. Geographic Coordinate System.






42. Arcs only ___ at Nodes






43. GIS is ________






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






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






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






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






48. Smoothing & Shape abstraction.






49. 2 ______: 1. Files/records. 2. Database/collection of files.






50. Relative to another known feature