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






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






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






4. Provide information about a particular topic or theme.






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






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






7. A Complete frame






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






9. Essentials of DBMS: Each record has a ________






10. 80 % of all information contain _________






11. Precision of a measurement with respect to time






12. Deliver location / topographic information.






13. 3 ______ attributes: 1. Values. 2. Relations. 3. Quality.






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






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






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






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






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






19. Google Maps or Microsoft Bing.






20. Blue - Green - Red - NIR....






21. Description by name: ex London






22. Understand spatial relations between landmarks>shortcuts.






23. Smoothing & Shape abstraction.






24. Accuracy - reliability - responsibility.






25. GIS is not a ______






26. A reference system (geographic coordinates)






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






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






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






30. 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






31. GIS is ________






32. 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.






33. Assigning location information to text & discourse.






34. Points - Polygons - Lines






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






36. Geographic Coordinate System.






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






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






39. Symbol on a map used to show direction






40. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






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






43. Most popular form of USGS Map






44. To avoid corrupt data!






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






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






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






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






49. Triangulated Irregular Network.






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