North American latitude and longitude position range

Lead: All 23 countries in North America are developing countries except the United States and Canada. So, what is the latitude and longitude range of North America? What is the latitude and longitude range of North America? The following is the relevant content I have compiled, I hope it will help you!

North American latitude and longitude position range

Latitude range of North America: 10 N-8 1 N, longitude range:167 w-20 w.

In North America, plains below 200 meters above sea level account for about 20%, plains and hills above 200-500 meters account for about 22%, plateaus and mountains above 500 meters account for about 58%, and the average elevation of the whole continent is 700 meters. The basic feature of continental topography is that the north-south mountains are distributed on the east and west sides parallel to the coast, and the great plains are distributed in the middle.

The outflow area of North America accounts for about 88% of the whole continent, of which 48% belongs to the Atlantic basin and 20% belongs to the Pacific basin. Except the St. Lawrence River, all major rivers originate in the Rocky Mountains. Rivers to the east of the Rocky Mountains flow into the Atlantic Ocean and the Arctic Ocean respectively, and rivers to the west flow into the Pacific Ocean.

Inflow areas (including non-inflow areas) account for about 12% of the whole continent, mainly distributed in great basin and Greenland in the western United States. Mississippi River is the largest river in North America and the fourth largest river in the world. Followed by Mackenzie River, yukon river River, St Lawrence River and Rio Grande.

The coastline of the mainland is about 60 thousand kilometers long. In the northwest section, the northern and eastern coasts are tortuous, and there are many islands and fjords; The southern half of the coast is relatively flat.

The coastal fishing grounds in North America account for about 20% of the total coastal fishing grounds in the world. The marginal seas in western and eastern Canada are the main fishing grounds, which are rich in salmon, sole, cod, mackerel, eel, herring, sardines, flounder, mensa and other fish, and whales are also produced in the marginal waters in eastern Canada. There are walruses, seals and polar bears on the northern coast.

Most residents in North America are descendants of European immigrants, among which Anglo-Saxons are the most. Followed by Indians, blacks and hybrids. In addition, there are Inuit, Puerto Ricans, Jews, Japanese and China people. The languages are English and Spanish, followed by French, Dutch and Hindi.

Latitude and longitude development history

In 120, a young man also studied astronomy and geography in this ancient library. This is Claudius Ptolemy. Ptolemy integrated the previous research results, thought that maps should be drawn according to fixed points with known latitude and longitude, and put forward the concept of drawing latitude and longitude network on maps. To this end, Ptolemy measured the latitude and longitude of important cities and strongholds in the Mediterranean and compiled eight volumes of geographical works. Including the latitude and longitude of 8000 places. In order to draw the longitude and latitude lines on the earth on a plane, he tried to draw them into simple sectors, thus drawing the famous Ptolemy map. /kloc-At the beginning of the 5th century, the navigator Henry began to put "Ptolemy Map" into practice. However, after repeated inspection, I found that this map is not practical. Some of Henry's captains said with regret, "Although we admire the famous Ptolemy very much, we found that the fact is contrary to what he said."

A "standard clock" is the key to correctly determine the latitude and longitude. It is obviously more convenient and practical to make accurate clocks and watches at sea than to rely on celestial bodies to time. /kloc-the progress of mechanical technology in the 0/8th century has finally created conditions for solving this long-standing problem. Harrison, a watchmaker in Yorkshire, England, spent 42 years making five timepieces in succession, each of which is more accurate and perfect than the other, and the accuracy is getting higher and higher. The fifth stop is only the size of a pocket watch, and the error caused by longitude measurement is only 1/3 miles. Almost at the same time, a sea timepiece designed and manufactured by French watchmaker Pierre leroy was put into use. At this point, the problem of longitude measurement at sea has finally been initially solved.

Longitude and latitude are both angles. Longitude is dihedral angle, that is, the angle between two meridian planes. Because all meridians are the same length, choose a starting point to measure longitude. After consultation at the 1884 international conference, it was decided that the starting meridian was the meridian crossing a main meridian cross at the Royal Greenwich Observatory (former site) on the south bank of the Thames in London, England. The prime meridian plane is the starting point plane and the ending point plane is the local meridian plane. The longitude of a point is the angle between the meridian plane where the point is located and the prime meridian plane. Measured on the equator, from the prime meridian plane as the starting point plane, measured to the east and west respectively. The east value is called east longitude and the west value is called west longitude. It can be seen that the longitude of a place is its direction and angular distance from the prime meridian. The prime meridian is zero longitude, the maximum longitude is east longitude 180, the maximum longitude is west longitude 180, and the longitude of east longitude 180 is the same meridian, so both east longitude and west longitude are called 180 longitude. On the globe, parallel to the equator is latitude, and perpendicular to the equator is longitude.