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






2. Assigning location information to text & discourse.






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






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






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






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






7. Preserve Direction






8. When parallels & meridians intersect at right angles.






9. Sailors and pilots use these maps to navigate






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






11. 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.






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






13. Arcs only ___ at Nodes






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






15. 80 % of all information contain _________






16. 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.






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






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






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






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






21. Symbol on a map used to show direction






22. The nature of relationships & connectivity between them.






23. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






24. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






25. A Complete frame






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






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






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






29. The ability to link files together.






30. Blue - Green - Red - NIR....






31. Digital Elevation Model






32. Lines that connect points of equal value.






33. 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






34. 2 ______: 1. Files/records. 2. Database/collection of files.






35. 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.






36. Deliver location / topographic information.






37. To avoid corrupt data!






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






39. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






40. Understand spatial relations between landmarks>shortcuts.






41. Most popular form of USGS Map


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






43. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






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






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






47. Can not be made from other colors






48. 2 common _______: 1. Vector. 2. Raster.






49. Description by name: ex London






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