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. To avoid corrupt data!






2. Preserve Direction






3. Sailors and pilots use these maps to navigate






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






5. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






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






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






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






11. Accuracy - reliability - responsibility.






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






13. Understand spatial relations between landmarks>shortcuts.






14. Contour lines never _______






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






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






17. Arcs only ___ at Nodes






18. A Complete frame






19. Representative fraction






20. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






22. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






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






24. Regulary spaced sample of points representing a surface.






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






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






27. The nature of relationships & connectivity between them.






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






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






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






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






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






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






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






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






36. Most popular form of USGS Map


37. GIS is not a ______






38. 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.






39. Relative to another known feature






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






41. Assigning location information to text & discourse.






42. Geographic Coordinate System.






43. Triangulated Irregular Network.






44. GIS is ________






45. A process of mathematical conversion.






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






47. Precision of a measurement with respect to time






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






49. Symbol on a map used to show direction






50. When parallels & meridians intersect at right angles.