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Mapping
Why do you think maps are important?
Latitude and LongitudeMapmakers
(cartographers) use an imaginary grid of parallel lines and vertical lines to locate points on Earth.
These lines are latitude and longitude.
Latitude
Lines measuring the distance north or south of the equator(the equator circles the Earth halfway between the north and south poles)
Latitude
Equator = 0o
North Pole = 90o North
South Pole = 90o South
Locations between the equator and poles are between 0 and 90
degrees N or S
Latitude
Measurements of latitude are in degrees. In order to be more precise, the degrees are
further divided into minutes (‘) and seconds (“).
Longitude
The distance in degrees East or West of the prime meridian.
Prime meridian – the reference point for longitude that represents 0 degrees longitude. This line runs through Greenwich, England
Longitude
Points west of the prime meridian are numbered 0 to 180o
west (W). Points east of the
prime meridian are numbered 0 to 180o
east (E).
Longitude
Like latitude, longitude is measured in degrees, minutes and seconds.
Locating Places
In order to locate a place, we need to know its longitude AND latitude. The location is the place where these two lines intersect and is unique for every place on earth!
Latitude is always listed first!
Time Zones
The earth is divided into 24 time zones, 1 for each hour of the day.
Each time zone is approx. 15 degrees wide, corresponding roughly to lines of latitude.
Why do you think some of the lines are not straight?