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






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






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






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






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. Geographic Coordinate System.






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






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






9. Relative to another known feature






10. 80 % of all information contain _________






11. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






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






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






15. Digital Elevation Model






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






17. Preserve Direction






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






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






20. 2 ______: 1. Files/records. 2. Database/collection of files.






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






22. GIS is not a ______






23. Essentials of DBMS: Each record has a ________






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






25. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






26. 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.






27. A reference system (geographic coordinates)






28. 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.






29. A Complete frame






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






31. Can not be made from other colors






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






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






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






35. Maps are restricted to a __________.






36. Explanatory list of symbols on a map






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






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






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






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






41. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






42. Most popular form of USGS Map

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43. Global Positioning System.






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






45. An assignment of geographic coordinates to locations.






46. 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.






47. Smoothing & Shape abstraction.






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






49. Assigning location information to text & discourse.






50. Deliver location / topographic information.