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






2. A process of mathematical conversion.






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






4. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






5. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






6. Provide information about a particular topic or theme.






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






8. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






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






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






11. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






12. 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.






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






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






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






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






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






18. Consists of F & E: 1. Features. 2. Entities.






19. Assigning location information to text & discourse.






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






21. Description by name: ex London






22. 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.






23. Most popular form of USGS Map


24. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






26. 2 ______: 1. Files/records. 2. Database/collection of files.






27. Precision of a measurement with respect to time






28. To avoid corrupt data!






29. Preserve Shape






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






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






32. Google Maps or Microsoft Bing.






33. Deliver location / topographic information.






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






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






36. 2 common _______: 1. Vector. 2. Raster.






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






38. An assignment of geographic coordinates to locations.






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






40. Are made with GIS






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






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






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






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






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






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






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






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






49. 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.






50. Representative fraction