Maps, projection and scale 2012

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Maps, projection and scale 2012

  1. 1. Maps, Projection and Scale MS. PATTEN 2010
  2. 2. What is a map?a graphic representation of the real world  Title  Orientation  Date  Author  Legend  Scale  Grid
  3. 3. What are the two main types of maps?Reference Maps Thematic Maps  show the locations of a  emphasize a particular variety of features theme or special topicCounties Dot MapRoads ChoroplethCountries Proportional SymbolTopographic Isorithmic Cartogram
  4. 4. Reference Maps: West Virginia Counties
  5. 5. Reference Maps: Minnesota Roads
  6. 6. Reference Maps: South American Countries
  7. 7. Reference Maps: Topographic Map
  8. 8. Thematic Map: Dot Map
  9. 9. Thematic Map: Choropleth Map
  10. 10. Thematic Map: Proportional Symbol
  11. 11. Thematic Map: Isarithmic Map
  12. 12. Thematic Map: Cartogram
  13. 13. What is scale?Ratio of the distance between two points found on a map compared to the actual distance between these points in the real world.All map scales are an expression of the numerical relationship between the MAP and the LAND that is represented. The MAP unit is always mentioned first.
  14. 14. Types of ScaleGraphic
  15. 15. Types of ScaleVerbal  1 Map Unit = x Land Units  1 inch = 63,360 inches  1 inch = 1 mile
  16. 16. Types of ScaleRepresentative Fraction  1 : 24,000  1:250,000  1/50,000
  17. 17. Large Scale vs Small Scale

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