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Published byMeryl Grant Modified over 8 years ago
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Map Skills: Points and Projections
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Cardinal Points Otherwise known as “directions” on a compass. Used to find one’s orientation on a map.
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Cardinal Points EastWest North South SoutheastSouthwest NortheastNorthwest
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Latitude Imaginary lines that circle the globe (aka Parallels). –Run East - West. –Measure distance in degrees North or South from the Equator. –Go from 0 to 90 degrees.
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Latitude
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The Equator separates the globe into North and South Hemispheres (or halves).
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Latitude Equator
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Poles Points on the globe found at 90 degrees North Latitude and 90 degrees South Latitude.
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North Pole (90 degrees North Latitude) South Pole (90 degrees South Latitude)
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Longitude Imaginary lines that circle the globe (aka Meridians). –Run North - South. –Measure distance in degrees East or West from the Prime Meridian. –Go from 0 to 180 degrees.
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Longitude
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The Prime Meridian separates the globe into East and West Hemispheres. –Runs through Greenwich, England (Royal Observatory).
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Longitude Prime Meridian
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Important Latitudes Tropic of Cancer – 23.5 Degrees N. Tropic of Capricorn – 23.5 Degrees S. Arctic Circle – 66.5 Degrees N. Antarctic Circle – 66.5 Degrees S
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Summary Cardinal points allow you to orient yourself using a compass and establish a place’s relative location. Lines of Latitude and Longitude can be used to establish a place’s absolute location.
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Map Projections All maps are distorted representations of the Earth’s surface. Different types of map projections are used for different purposes.
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Mercator Maps
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Distort: Size and Shape Uses: Ship Navigation (Easy to plot courses)
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Polar Maps
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Distort: Size and Shape Uses: Airline navigation (Shortest distance between two points is a strait line).
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Robinson Maps
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Distort: Size and Distance Uses: Displaying Data (As in thematic maps)
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Robinson Maps Often thematic (display data): PopulationClimate Economic ActivityPrecipitation ResourcesVegetation LanguagesPhysical EthnicityPolitical
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