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






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






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






4. 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.






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






6. Symbol on a map used to show direction






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






8. 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.






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






10. Provide information about a particular topic or theme.






11. Relative to another known feature






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






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






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






15. Deliver location / topographic information.






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






17. Arcs only ___ at Nodes






18. Preserve Shape






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






20. User generated content (UGC). Volunteered geog. info (VGI). Professional vs amateur. Neogeography vs GIS.






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






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






23. GIS is not a ______






24. The reverse of each other.






25. Contour lines never _______






26. The acquisition of data about Earth's surface from a satellite orbiting the planet or other long-distance methods.






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






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






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






30. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






31. 2 common _______: 1. Vector. 2. Raster.






32. Can not be made from other colors






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






34. Points - Polygons - Lines






35. Regulary spaced sample of points representing a surface.






36. 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.






37. Precision of a measurement with respect to time






38. Preserve Direction






39. Essentials of DBMS: Each record has a ________






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






41. A reference system (geographic coordinates)






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






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






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






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






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






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






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






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






50. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.