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






2. 80 % of all information contain _________






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






4. Sailors and pilots use these maps to navigate






5. Preserve Shape






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






7. 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






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






9. A Complete frame






10. Global Positioning System.






11. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






12. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






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






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






16. 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.






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






18. 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.






19. Accuracy - reliability - responsibility.






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






21. 2 common _______: 1. Vector. 2. Raster.






22. Assigning location information to text & discourse.






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






24. Precision of a measurement with respect to time






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






26. Essentials of DBMS: Each record has a ________






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






28. 2 reasons why Topology matters: 1. Error detection. 2. ___________.






29. The nature of relationships & connectivity between them.






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






31. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






32. Understand spatial relations between landmarks>shortcuts.






33. Uses coordinates (X -Y) to represent spatial features. Scale matters involve what Polygons<>points. Polygons<>lines.






34. Arcs only ___ at Nodes






35. Geographic Coordinate System.






36. Triangulated Irregular Network.






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






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






39. Relative to another known feature






40. A process of mathematical conversion.






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






42. An assignment of geographic coordinates to locations.






43. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






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






46. Contour lines never _______






47. The ability to link files together.






48. Regulary spaced sample of points representing a surface.






49. 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.






50. Preserve Direction