2a_mapsSP2008 - Maps are our Pals 2008 and so are...

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1/9/2008 1 Maps are our Pals 2008 and so are logarithms Welcome toGreg’s House January 9, 2008 GOALS OF Part II We will look at hundreds of maps this semester and I want to review some basic map terms and concepts I want to review the use of logarithmic conversions (log 10, natural log) for number compression. Maps are human creations and over time conventions develop • The Map King doesn’t say North must be on the top, or West is left!! The prime meridian is only the prime meridian by convention. Similarly, the equator, latitude, longitude, polar zone, temperate zone, tropic zone and equator are concepts from European cartography
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1/9/2008 2 Map Scale ―Scale‖ is a ratio between distances on the map and on the earth A “large scale” map shows a small area of the earth in Great detail. A “small scale” map shows a large area of the earth with LITTLE detail . (test-a-roo!!) Earth or Biosphere Terms…... OK, Let’s be a little crass ---the terms on the next frame are on the test so if you don’t know these terms, write them down…… Globe Terms Lines of Latitude = parallels ==equator Lines of Longitude = meridians ==a great circle passing through the poles. Prime Meridian equator 23 1/2 degrees as the Tropic of Cancer (Northern Hem.) and Capricorn (Southern hem.)
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1/9/2008 3 Maps are found in all cultures.
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