Numbered lines on many maps are to help locate places. Lines that run north to south are called longitude lines or meridians. Lines from east to west are latitude lines or
parallels. Note that lines are numbered in degrees (shown by the symbol 9. Because
lines of latitude and longitude cross and form a grid, the use of these lines to locate
places is called the grid system. Use these diagrams and maps to answer the questions.
LATITUDE LINES (PARALLELS)
LONGITUDE LINES (MERIDIANS)
North Pole
SO'N
-BO'N
150°W
150"E
30'N
North
120"w
Pole
120'E
North Latitude
Equator
90°W
90'E
20
South Latitude
-30°S
Primo Meridian
60'w
60"E
-60°S
BO'S
South Pole
North Polo
30"w
West Longitude
30'E
East Longitude
50"N
90'N
SO'N
80'N
NORTHE
AMERICA
180
+150"w-
120"w
30'N
Equator
1994
30"E
Equator
0°
SOUTH
AMERICA
30's
30"S
80'S
60'S
90's
to M.09
South Pole
100
M. OS:
8
M.08
120°W
M. DC
LATITUDE AND LONGITUDE GRID
NORTH AND SOUTH AMERICA