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. Most popular form of USGS Map


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






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






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






5. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






6. Can not be made from other colors






7. To avoid corrupt data!






8. Are made with GIS






9. Lines that connect points of equal value.






10. Essentials of DBMS: Each record has a ________






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






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






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






14. 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.






15. 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






16. Provide information about a particular topic or theme.






17. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






18. Description by name: ex London






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






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






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






22. When parallels & meridians intersect at right angles.






23. Blue - Green - Red - NIR....






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






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






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






27. GIS is ________






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






29. Preserve Shape






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






31. Understand spatial relations between landmarks>shortcuts.






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






33. A process of mathematical conversion.






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






35. Deliver location / topographic information.






36. An assignment of geographic coordinates to locations.






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






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






39. Regulary spaced sample of points representing a surface.






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






41. People creating their own maps - on their own terms by combining elements of an existing toolset.






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






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






45. Symbol on a map used to show direction






46. Triangulated Irregular Network.






47. Representative fraction






48. 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.






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






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