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






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






4. GIS is not a ______






5. Provide information about a particular topic or theme.






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






7. GIS is ________ - spatial analysis & dependent on the computer.






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






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






10. Most popular form of USGS Map

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






12. Preserve Direction






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






14. Can not be made from other colors






15. The study of place names - origins - history & meanings.






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






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






18. Deliver location / topographic information.






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






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






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






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






23. Google Maps or Microsoft Bing.






24. Digital Elevation Model






25. Global Positioning System.






26. An assignment of geographic coordinates to locations.






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






28. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






29. Essentials of DBMS: Each record has a ________






30. Real Things (trees - forests - cities etc).






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






32. 80 % of all information contain _________






33. Contour lines never _______






34. Preserve Shape






35. Symbol on a map used to show direction






36. Maps are restricted to a __________.






37. 2 common _______: 1. Vector. 2. Raster.






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






39. 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.






40. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






42. 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.






43. 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.






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






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






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






47. Points - Polygons - Lines






48. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






49. When parallels & meridians intersect at right angles.






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







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