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. GIS is ________






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






3. Essentials of DBMS: Each record has a ________






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






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






6. The nature of relationships & connectivity between them.






7. 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.






8. 2 common _______: 1. Vector. 2. Raster.






9. Blue - Green - Red - NIR....






10. 3 levels of _______:1. Conceptual - definitions - attributes. 2. Logical Model - formalize definitions & measures. 3. Digital Model - define & describe features.






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






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






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






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






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






16. Description by name: ex London






17. 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.






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






19. Symbol on a map used to show direction






20. 3 different types of ________ - content & services ICS I - Infrastructure (Hardware & Sensors). C - Content (sensors - APIs - UGC & VGI). S - Standards (or lack thereof): access - authority.






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






22. Assigning location information to text & discourse.






23. 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.






24. Relative to another known feature






25. The reverse of each other.






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






27. Maps are restricted to a __________.






28. Accuracy - reliability - responsibility.






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






30. An assignment of geographic coordinates to locations.






31. Representative fraction






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






33. Deliver location / topographic information.






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






35. Thematic map that uses dots to represent the frequency of a variable in a given area.






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






37. 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.






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






39. 2 ______: 1. Files/records. 2. Database/collection of files.






40. 36 Spatial Res: 250m Temporal Res: 1 day Swath Width: 2 -330km






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






42. Smoothing & Shape abstraction.






43. When parallels & meridians intersect at right angles.






44. Digital Elevation Model






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






46. 9 Features & Entities: 1. Mountains. 2. Rivers. 3. Forests. 4. Clouds. 5. ________. 6. Cities. 7. Populations. 8. Streets. 9. Fire Hydrants.






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






48. A process of mathematical conversion.






49. Lines that connect points of equal value.






50. Precision of a measurement with respect to time