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






2. Are made with GIS






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






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






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






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






7. 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.






8. The ability to link files together.






9. Precision of a measurement with respect to time






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






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






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






13. Most popular form of USGS Map

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






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






16. Preserve Direction






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






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






19. A Complete frame






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






21. 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






22. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






24. Geographic Coordinate System.






25. To avoid corrupt data!






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






27. 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.






28. Contour lines never _______






29. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






30. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






32. Provide information about a particular topic or theme.






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






34. 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.






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






36. Sailors and pilots use these maps to navigate






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






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






39. Essentials of DBMS: Each record has a ________






40. Understand spatial relations between landmarks>shortcuts.






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






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






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






44. Google Maps or Microsoft Bing.






45. Arcs only ___ at Nodes






46. Explanatory list of symbols on a map






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






48. 80 % of all information contain _________






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






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