2a_mapsSP2008 - 1/9/2008 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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3 Maps are found in all cultures. 900 BC
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2a_mapsSP2008 - 1/9/2008 Maps are our Pals 2008 and so are...

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