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. Preserve Shape






2. 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.






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






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






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






6. Are made with GIS






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






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






9. Digital Elevation Model






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






11. A reference system (geographic coordinates)






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






13. A process of mathematical conversion.






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






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






16. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






17. Google Maps or Microsoft Bing.






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






19. Deliver location / topographic information.






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






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






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






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






24. The nature of relationships & connectivity between them.






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






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






27. 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.






28. The reverse of each other.






29. Description by name: ex London






30. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






32. A Complete frame






33. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






34. 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.






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






36. Can assume all values between any two specific values. They are obtained by measuring.






37. Precision of a measurement with respect to time






38. Geographic Coordinate System.






39. 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






40. An assignment of geographic coordinates to locations.






41. Essentials of DBMS: Each record has a ________






42. Smoothing & Shape abstraction.






43. When areas on a map maintain the same proportional relationship to the areas on the earth that they represent.






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






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






46. Global Positioning System.






47. Can not be made from other colors






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






49. Accuracy - reliability - responsibility.






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