Because when you travel in longitude, you can go all the way around the Earth,
360 degrees, crossing new longitudes all the way .
But when you travel in latitude, the farthest you can travel is from one pole to
the other pole ... halfway around the Earth, 180 degrees. Once you reach the
opposite pole, if you keep going farther, you're just crossing latitudes that you've
already crossed once.
Because you must go all the way around the Earth in order to cross every possible longitude, but you only need to go half-way around it ... pole to pole ... in order to stand at every possible latitude. And by the way . . . there are an infinite number of longitudes, that cover a range of 360 degrees, and an infinite number of latitudes, that cover a range of 180 degrees.
There are several ways to come at this answer, most of them way too technical and arcane to bother with. The easiest answer to state and understand may be simply the fact that each parallel of latitude goes all the way around the Earth, but each meridian of longitude only goes half-way around the Earth, so you need more of them to cover the whole Earth. Does that do anything for you ? And by the way . . . there are only 180 degrees of latitude.
Degrees East and West of Greenwich, England. From 0° to 180° on the opposite side of the Earth.
The largest possible latitudes are 90 degrees north (the north pole) and 90 degrees south (the south pole).The largest possible longitudes are 180 degrees east and 180 degrees west.Both of those longitudes are the same line ... the International Date Line,which runs down the middle of the Pacific ocean.
180 to the east and 180 to the west
Because you must go all the way around the Earth in order to cross every possible longitude, but you only need to go half-way around it ... pole to pole ... in order to stand at every possible latitude. And by the way . . . there are an infinite number of longitudes, that cover a range of 360 degrees, and an infinite number of latitudes, that cover a range of 180 degrees.
There are several ways to come at this answer, most of them way too technical and arcane to bother with. The easiest answer to state and understand may be simply the fact that each parallel of latitude goes all the way around the Earth, but each meridian of longitude only goes half-way around the Earth, so you need more of them to cover the whole Earth. Does that do anything for you ? And by the way . . . there are only 180 degrees of latitude.
Degrees East and West of Greenwich, England. From 0° to 180° on the opposite side of the Earth.
The largest possible latitudes are 90 degrees north (the north pole) and 90 degrees south (the south pole).The largest possible longitudes are 180 degrees east and 180 degrees west.Both of those longitudes are the same line ... the International Date Line,which runs down the middle of the Pacific ocean.
Every point on Earth has a different pair of latitude and longitude numbers,and there are an awful lot of different points in the US.The US occupies all longitudes in these ranges:172.44° to 180° East66.95° to 124.74° West129.98° to 180° West.The US occupies all latitudes in these ranges:18.91° to 22.23° North24.52° to 49.38° North54.64° to 71.39° North.
Latitude and longitude are angles that describe the location of a point on the Earth's surface. Longitudes range from zero to 180 degrees east or west. Latitudes range from zero to 90 degrees north or south. There are no official 'lines'. Some maps or globes have some lines printed on them to show where a few latitudes and longitudes are, and other maps and globes have no lines at all printed on them. I have mapping software that can print 324,000 latitude lines and 648,000 longitude lines if I want them, but I have never needed them yet.
180 to the east and 180 to the west
It would depend on the specific map. On a globe, there are an unlimited number of specific latitudes between 0 and 90 degrees north (equator to North Pole) and 0 and 90 degrees south (equator to South Pole). Longitudes range from 0 to 180 east and 0 to 180 west from the Prime Meridian, with 180 east and 180 west being the same line (on which the International Date Line is based). The total circumference of the planet is 360 degrees, and it would appear as a circle viewed from above either of the poles. Each degree of longitude is about 111.32 kilometers wide at the equator. Degrees can be divided further into minutes and seconds, or to any accuracy of decimal degrees.
There is no "last line" of longitude. The longitude of points on the earth's surface ranges from zero to 180 degrees east and zero to 180 degrees west. There is no number within this range that doesn't describe billions of points, and no place on earth that doesn't have a longitude. Your map or globe may include a few widely spaced lines to indicate selected longitudes, or it may not. If it does, you should not fall into the trap of believing that those are the only longitudes that exist.
Lines of longitude (meridians) run north/south and measure angular distance east and west of the prime meridian to a maximum of 180 degrees east or west. Lines of latitude (parallels) measure angular distance from the equator. The maximum is 90 degrees north or south of the equator.
The Eastern Hemisphere includes ALL latitudes: latitudes are a measurement north and south, from the equator to the pole.The longitude of the Eastern Hemisphere includes all longitudes labeled E for east, from the Prime Meridian eastward to 180° longitude (the International Date Line). This includes all of Europe and Australia and most of Africa and Asia.
Longitudes are expressed between zero and 180 degrees east and west. 180 degrees in either direction from the Prime Meridian brings you to the same place ... halfway around the Earth.