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. Regulary spaced sample of points representing a surface.






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






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






4. Deliver location / topographic information.






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






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






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






8. Geographic Coordinate System.






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






10. Accuracy - reliability - responsibility.






11. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






12. Smoothing & Shape abstraction.






13. Representative fraction






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






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






16. 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.






17. Can not be made from other colors






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






19. GIS is not a ______






20. 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






21. GIS is ________






22. Assigning location information to various media (photos - video - music).






23. Most popular form of USGS Map






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






25. 2 common _______: 1. Vector. 2. Raster.






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






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






28. User generated content (UGC). Volunteered geog. info (VGI). Professional vs amateur. Neogeography vs GIS.






29. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






31. The ability to link files together.






32. Blue - Green - Red - NIR....






33. Description by name: ex London






34. 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.






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






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






37. An assignment of geographic coordinates to locations.






38. 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.






39. The reverse of each other.






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






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






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






43. Symbol on a map used to show direction






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






45. When parallels & meridians intersect at right angles.






46. Lines that connect points of equal value.






47. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






49. Precision of a measurement with respect to time






50. Triangulated Irregular Network.