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






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






3. A Complete frame






4. Blue - Green - Red - NIR....






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






6. Google Maps or Microsoft Bing.






7. Arcs only ___ at Nodes






8. When parallels & meridians intersect at right angles.






9. Contour lines never _______






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






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






12. Description by name: ex London






13. Are made with GIS






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






15. Accuracy - reliability - responsibility.






16. A process of mathematical conversion.






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






18. Can not be made from other colors






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






20. Deliver location / topographic information.






21. The nature of relationships & connectivity between them.






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






23. 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.






24. 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.






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






26. Lines that connect points of equal value.






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






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






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






30. Triangulated Irregular Network.






31. Regulary spaced sample of points representing a surface.






32. A reference system (geographic coordinates)






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






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






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






36. Essentials of DBMS: Each record has a ________






37. 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.






38. The reverse of each other.






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






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






41. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






42. 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.






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






44. Application Programming Interfaces (increases access like my maps on google).






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






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






47. 80 % of all information contain _________






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






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






50. The ability to link files together.