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






2. When parallels & meridians intersect at right angles.






3. 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.






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






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






6. Representative fraction






7. An assignment of geographic coordinates to locations.






8. A map containing information on only one topic or theme.






9. Symbol on a map used to show direction






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






11. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






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






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






15. Relative to another known feature






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






17. Blue - Green - Red - NIR....






18. Smoothing & Shape abstraction.






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






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






21. Global Positioning System.






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






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






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






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






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






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






28. Digital Elevation Model






29. Triangulated Irregular Network.






30. 2 common _______: 1. Vector. 2. Raster.






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






32. The ability to link files together.






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






34. Application Programming Interfaces (increases access like my maps on google).






35. The reverse of each other.






36. Google Maps or Microsoft Bing.






37. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






38. Provide information about a particular topic or theme.






39. A process of mathematical conversion.






40. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






41. 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.






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






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






44. Arcs only ___ at Nodes






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






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






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






48. A reference system (geographic coordinates)






49. Points - Polygons - Lines






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