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GEOG 2110L (50)
Lecture

LATITUDE & LONGITUDE.docx

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Department
Geography
Course
GEOG 2110L
Professor
David Stanley
Semester
Spring

Description
LATITUDE & LONGITUDE Earth is a sphere or has a spheroidal shape. It actually bulges at the Equator or more accurately has a geoidal bulge at the Equator. Equatorial diameter: 12, 756 km = 7926 mi (24,902 mi circumference) Polar diameter: 12, 714 km = 7900 mi (24,860 mi cir.) To Locate Places on the surface we use a grid system. Several types have been developed and are in use. Most common or well known is the latitude and longitude grid system. Latitude: parallel lines that run East-West and are measured North-South. start at 0° (equator), end at 90° (poles) cannot go past 90° LATITUDE Longitude: non-parallel lines that run North-South and are measured East-West, start at 0° (Prime Meridian) and end at 180° (International Date Line ** degree: one part of a circle, with 360 parts or degrees in a complete circle ** a degree is sub-divided into 60 equal parts or minutes ** a minute is sub-divided into 60 equal parts or seconds EX: 12°35'15" N 104°55'30" E * Latitude must have a N or S after it for north (N) or south
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