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






2. Explanatory list of symbols on a map






3. Lines that connect points of equal value.






4. Preserve Shape






5. 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






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






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






8. Global Positioning System.






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






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






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






12. The ability to link files together.






13. Smoothing & Shape abstraction.






14. Provide information about a particular topic or theme.






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






16. The 5 __________: TTCETH - 1. Triangle table 2. Triangle-Node table 3. Coordinate table 4. Triangle-Edge table 5. Hull-Edge table.






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






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






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






20. Regulary spaced sample of points representing a surface.






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






22. Essentials of DBMS: Each record has a ________






23. Precision of a measurement with respect to time






24. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






25. An assignment of geographic coordinates to locations.






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






27. Can not be made from other colors






28. 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.






29. A reference system (geographic coordinates)






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






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






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






33. The nature of relationships & connectivity between them.






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






35. Sailors and pilots use these maps to navigate






36. Maps are restricted to a __________.






37. A Complete frame






38. Representative fraction






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






40. Arcs only ___ at Nodes






41. Triangulated Irregular Network.






42. Blue - Green - Red - NIR....






43. Digital Elevation Model






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






45. Google Maps or Microsoft Bing.






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






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






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






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






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