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Unformatted text preview: What tools to geographers have to study the earth and its inhabitants? • Maps o Fundamental means of communications as the printed or spoken word and photographs o Modern scientific mapping has its roots in the 17 th century because they recognized the spherical form of the Earth and developed map projections and updated the grid system The explorers had to know how to get to wherever they were going. They also realized that the Earth wasn’t flat. They could represent what the explorers were finding o Because the Earth is not a perfect sphere and maps are flat, there are limitations There is a type of representation that has been used for a very long time. It is inaccurate, which is a limitation Cartographers (map makers) established the grid system which consists of a set of imaginary lines drawn across the face of the Earth • Latitude and longitude were created so that we could put the spherical earth onto a flat map • The key reference points are the equator (0 degrees latitude) and the Prime Meridian (0 degrees longitude) o The equator bisects the earth around the middle creating the North and South Hemispheres and measures 0 degrees latitude. o The Prime Meridian has changed where it was. It now passes through Greenwich. It is an imaginary line passing through the Royal Observatory in Greenwich, England that which was selected as 0 degrees longitude....
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This note was uploaded on 07/15/2008 for the course GEOG 1001 taught by Professor Baksi during the Spring '07 term at LSU.
- Spring '07