GEOG
GEOL-1041-ONLINE-Lab Exercise 2-The Geographic Grid System-Summer2016 (1)

# GEOL-1041-ONLINE-Lab Exercise 2-The Geographic Grid System-Summer2016 (1)

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Lab Exercise #2 The Geographic Grid System Imagine a Single Dot on a Table Tennis Ball. How Would You Describe Its Location?

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It would be quite difficult. The same is true of locations on the Earth's surface. Geographers have solved this problem by creating latitude lines and longitude lines. I. What is Latitude and Longitude? The Geographic gird of parallels and meridians is an artifact, or cultural thing, created by humans as a concept originating in the brain. Does this mean that the geographic grid shouldn’t be in include in physical geography? Latitude lines are imaginary lines on the earth's surface. They run east and west around the globe and tell you your distance north or south of the Equator. Think of latitude like the rungs of a ladder (ladder sounds a lot like latitude). Latitude lines run east and west, but they tell how far up (north) you can go or how far down (south) you can go. Longitude lines are imaginary lines on the earth's surface that run from pole to pole around the globe and tell you your distance east or west from the Prime Meridian. When you think of longitude, think of long, tall telephone poles (because longitude lines run from pole to pole). Longitude lines run north and south, but they tell how far east you can go or how far west you can go.
II. Why Are Latitude and Longitude Measured in Degrees? In the field of mathematics, circles are measured in degrees. There are 360 degrees in a circle. Since the earth is basically circular, it was decided to measure latitude and longitude in degrees also. The first latitude line was the Equator (equally distant between the north and south poles). It is the largest of all latitude lines. All other latitude lines are measured in degrees north or south of the Equator. There are a maximum of 90 degrees of latitude to the north or the south of the Equator.

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The first longitude line was the Prime Meridian. Any meridian could have been chosen as the Prime Meridian because they are all exactly the same. The Prime Meridian was selected by international agreement at the International Meridian Conference called by President Chester Arthur in October of 1884. Representatives from 25 nations met in Washington, D.C. All other longitude lines are
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• Spring '14
• CharlesRGunter
• Geography, latitude lines, longitude lines

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