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by: Tracy Gusikowski I


Marketplace > Texas Tech University > Geography > GEOG 3300 > GEOGRAPHIC INFORMATION SYSTEMS
Tracy Gusikowski I
GPA 3.99


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Class Notes
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This 1 page Class Notes was uploaded by Tracy Gusikowski I on Thursday October 22, 2015. The Class Notes belongs to GEOG 3300 at Texas Tech University taught by Staff in Fall. Since its upload, it has received 21 views. For similar materials see /class/226367/geog-3300-texas-tech-university in Geography at Texas Tech University.




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Date Created: 10/22/15
GEOGRAPHY 3300 5300 Lecture Outline The Geographic Grid see Geographic Grid handout geographic grid is a spherical coordinate system based on latitude and longitude lines of latitude and longitude are measured using degrees minutes and seconds angular measurements latitude and longitude are referenced from the center of the earth Latitude also called parallels east west line used to measure the arc angular distance north and south of the Equator range from 0 to 90 north and south of the Equator encircle the globe except for north and south poles lines of latitude are parallel to one another important lines of latitude include North Pole 90 N and South Pole 90 S Arctic Circle 665 N and Antarctic Circle 665 S Equator 0 Tropic of Cancer 235 N and Tropic of Capricorn 235 S Longitude also called meridians northsouth lines used to measure the arc angular distance east and west of the Prime Meridian range from 0 to 180 east and west of the Prime Meridian lines of longitude do not encircle the globe they extend from pole to pole meridians converge at the north and south poles important lines of longitude include Prime meridian in Greenwich England 0 International Dateline mid Pacific 180 Describing Coordinates by convention we usually give latitude first followed by longitude for greater precision each degree of latitude or longitude can be subdivided into 60 minutes for still greater precision each minute can be divided into 60 seconds Latitude and Longitude in a GIS Environment in a GIS latitude and longitude are expressed as decimal degrees know how to convert degrees minutes and seconds to decimal degrees know how to differentiate the hemispheres as positive or negative decimal degrees eg western and southern hemispheres are expressed as negative values Geographic Grid on Topographic Maps know how the geographic coordinate system works knowhowtofindg a quot quot ona s map Copyright 2009 Kevin Mulligan Texas Tech University


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