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






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






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






4. 2 common _______: 1. Vector. 2. Raster.






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






6. Contour lines never _______






7. 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.






8. Maps that show the absolute location of places and geographic features determined by a frame of reference - typically latitude and longitude






9. An assignment of geographic coordinates to locations.






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






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






12. Sailors and pilots use these maps to navigate






13. 2 ______: 1. Files/records. 2. Database/collection of files.






14. Are made with GIS






15. Geographic Coordinate System.






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






17. GIS is not a ______






18. 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.






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






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






21. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






22. Description by name: ex London






23. The ability to link files together.






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






25. A process of mathematical conversion.






26. Smoothing & Shape abstraction.






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






28. Google Maps or Microsoft Bing.






29. Precision of a measurement with respect to time






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






31. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






32. Preserve Shape






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






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






35. Points - Polygons - Lines






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






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






38. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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






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






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






43. 2 ______: 1. Unique ID. 2. Type Code. 3 Spatial Components PLP 1. Point. 2. Line/arc. 3. Polygon/area.






44. Provide information about a particular topic or theme.






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






46. 7 Spatial Res: 30m Temporal Res: 16 day Swath Width: 183km






47. The nature of relationships & connectivity between them.






48. Maps are restricted to a __________.






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






50. A reference system (geographic coordinates)