GIS3043_Lecture_04 - GIS3043C GISforEnvironmentalStudies...

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GIS3043C GIS for Environmental Studies Fall 2010 Michael J. Gilbrook, GISP, AICP Frank Salmon, GISP Lecture 04 Map Projections
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Fall 2010 Lecture #04 Slide Number 2 Geographic Coordinates Lines of Latitude Lines of Longitude Geographic  Coordinates  describe  locations on the surface  and assume  Earth is a  sphere . Lines of Longitude  are  equal length divisions  around the  circumference of the  planet, running North- South Lines of Latitude  are  lines spaced parallel to  the Equator, running  East-West
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Fall 2010 Lecture #04 Slide Number 3 Lines of Latitude (Parallels) The  Equator  follows  the circumference  along the diameter of  the planet.  It is the  same length as a line  of Longitude. Latitude measured in  degrees North (+) or  South (-) from the  equator Latitude lines  decrease in length  approaching poles
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Fall 2010 Lecture #04 Slide Number 4 Lines of Longitude (Meridians) Prime Meridian      (0.0 degrees  longitude) passes  through Greenwich,  England Longitude measured  in degrees W (-) or  E (+) from Prime  Meridian. Longitude lines  converge at the  poles and meet West East
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Fall 2010 Lecture #04 Slide Number 5 Geographic Coordinate Examples -94.7, 38.81 -117.12, 32.86 -81.71, 30.36 -60.20, -2.99 Locations in North  American Have  Negative  Longitude,  Positive  Latitude Locations Below the  Equator have  Negative  Longitude  and Negative  Latitude Longitude Increases  East to West Latitude Increases  From Equator to  Poles
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Fall 2010 Lecture #04 Slide Number 6 Projection Process Start With a Globe of the  Earth’s Surface Shrink Globe to Desired  Size Associate Globe With a  Developable ” or  “Flattenable” Surface. Transfer (or 
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This note was uploaded on 11/08/2011 for the course GIS 3043 taught by Professor Gilbrook during the Fall '10 term at University of Central Florida.

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GIS3043_Lecture_04 - GIS3043C GISforEnvironmentalStudies...

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