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. Most popular form of USGS Map


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






3. Precision of a measurement with respect to time






4. Description by name: ex London






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






6. Blue - Green - Red - NIR....






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






8. Points - Polygons - Lines






9. 2 common _______: 1. Vector. 2. Raster.






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






11. Assigning location information to text & discourse.






12. Defined by NOIR NOIR N-Nominal - qualitive data. O-Ordinal - order or ranking. I-Interval - numeric scale - arbitrary units. R - Ratio - fixed origin - continuous scale.






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






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






15. 2 ______: 1. Files/records. 2. Database/collection of files.






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






17. Google Maps or Microsoft Bing.






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






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






20. Can not be made from other colors






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






22. A reference system (geographic coordinates)






23. GIS is not a ______






24. 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






25. Contour lines never _______






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






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






28. Essentials of DBMS: Each record has a ________






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






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






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






32. Digital Elevation Model






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






34. 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.






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






36. Representative fraction






37. Accuracy - reliability - responsibility.






38. Provide information about a particular topic or theme.






39. Are made with GIS






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






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






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






43. The ability to link files together.






44. Arcs only ___ at Nodes






45. 80 % of all information contain _________






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






47. 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.






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






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






50. 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.