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






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






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






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






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






6. Arcs only ___ at Nodes






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






8. Representative fraction






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






10. A process of mathematical conversion.






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






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






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






14. Can not be made from other colors






15. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






17. Digital Elevation Model






18. Relative to another known feature






19. 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






20. When parallels & meridians intersect at right angles.






21. 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.






22. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






24. 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.






25. Symbol on a map used to show direction






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






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






28. Points - Polygons - Lines






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






30. The reverse of each other.






31. Explanatory list of symbols on a map






32. The ability to link files together.






33. 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.






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. A Complete frame






36. Triangulated Irregular Network.






37. Most popular form of USGS Map


38. Contour lines never _______






39. Sailors and pilots use these maps to navigate






40. 80 % of all information contain _________






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






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






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






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






45. Assigning location information to text & discourse.






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






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






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






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






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