How to distinguish between warp and weft, and how to distinguish between warp and weft?

Longitude: The line that connects the north and south poles and intersects perpendicularly with the parallel, also known as the prime meridian. The meridian indicates the north-south direction; All the warp threads are semicircular and equal in length; Two warp lines facing each other form a warp coil; Any one warp coil can divide the Earth into two hemispheres.

To the north and south poles two points shortened to points.

Parallel: On the globe, the circle that circles around the globe in the east-west direction is called the parallel. All the parallels are parallel to each other and perpendicular to the meridians, which indicate the east-west direction.

The size of the weft coil varies, with the equator being the largest latitude coil, and gradually shrinking from the equator to the poles, and then to the north and south poles to the points. It is divided into low latitude 30°, middle latitude 60°, high latitude 90°.

Determine the method. The meridians and parallels were drawn on globes and maps in order to determine the position and direction on the earth, and there were no latitude and longitude lines on the ground. It's not hard for you to see the meridians of your place, though:

Stand a bamboo pole on the ground, and when the sun rises at its highest at noon, the shadow of the bamboo pole is the meridian of your place. Because the meridian indicates the north-south direction, the meridian is also called the meridian.

On a map, a meridian and a parallel perpendicular to the meridian can be drawn at any point on the earth's surface. In this way, countless warp and weft threads can be drawn. How can you distinguish these warp and weft threads?

The best thing to do is to give each of the warp and latitude threads a name, which is latitude and longitude. The name of each meridian is indicated by longitude, and the name of each parallel is represented by latitude.

Internationally, the meridian that passes through the original site of the Greenwich Observatory in the United Kingdom is called the 0° meridian, also known as the prime meridian. From the 0° meridian to the east is called the east longitude; To the west is called the West Longitude. Since the Earth is a sphere, it has 180° east and west longitudes.

180°E and 180°W are on the same meridian, that is the 180° meridian.

The longest coil of latitude, the equator, is called the 0° parallel. The latitude measured from the equator to the north is called the north latitude; The one to the south is called the southern latitude. There are 90° north and south latitudes. The North Pole is 90° north latitude.

Since the meridians connect the north and south poles, all the meridians are equal in length and indicate the north-south direction. The parallels all indicate the east-west direction. The warp and weft threads are perpendicular to each other and intertwined with each other, forming a graticule.

When we read a map, we can use the graticule to determine the direction, and we can also determine the latitude and longitude of any point on the earth.

The meridians and parallels can also divide the earth into several different hemispheres. Like cutting a watermelon, the earth is cut along the equator, and the hemisphere north of the equator is called the northern hemisphere; The hemisphere south of the equator is called the Southern Hemisphere. For example, if the earth is cut along the longitude of 20°W and 160°E, the hemisphere from 20°W to 160°E is called the Eastern Hemisphere; The hemisphere to the west is called the western hemisphere.

Distinction between warp and weft.

Vertically it is the warp, the horizontal weft.

If you can't remember it, then you just need to remember that the warp is of equal length, otherwise you can only remember the warp 360°.

If you still can't remember, just remember the location of Beijing, 120° east longitude and 40° north latitude.

It's not a good skill, you memorize the latitude and longitude of some areas or something, look at the map more, you can definitely remember.

The transverse line is the weft line and indicates something.

The longitudinal line is the meridian line that indicates the north and south.

Skill; Horizontal is weft, vertical is warp...Horizontal and vertical, weft warp. Do more questions, and you'll remember it slowly.

A whole circle in the horizontal direction is the weft, and a semicircle in the longitudinal direction is the neckline.

Generally, the transverse line is the weft line, and the longitudinal line is the warp line.

Horizontally is the weft, and vertically is the warp.

Features of the warp:

1. Shape: semi-circular; Two meridians facing each other (180°) form a meridian coil, and each meridian divides the earth.

2. Length: All the warp lengths are equal (about 20,000km).

3. Relationship: All meridians intersect at the north and south poles.

4. Interval: The interval between any two meridians, which is the longest on the equator and decreases to the poles.

5. Direction: Indicate the north-south direction.

The meridian is a semicircular arc that connects the north and south poles on the earth's surface and is perpendicular to the latitude, from east to west from 180 degrees east longitude to 180 west longitude, and everything on the earth passes through the earth's axis.

The large circle formed by the plane and the ground is called the "warp coil". The semicircle in which the warp coil is divided by the poles is called the "warp". Any two meridians of equal length intersect at the north and south poles.

There are 360 meridians connecting the earth from the South Pole to the North Pole on the map, and there are 180 meridians in the eastern and western hemispheres, each of which is separated by one degree, and the two degrees are about 111 kilometers apart from each other.

The horizontal line on the map is the latitude line, which is divided into the northern and southern hemispheres from the middle of the earth, and the parallel line in the middle is called the equator, which is 0 degrees of latitude, with a total of 180 degrees of latitude, and the northern and southern hemispheres are divided into 90 degrees. The north and south poles are 90 degrees north and south latitudes, respectively. The distance between each latitude is also about 111 kilometers.

The representative symbols of latitude and longitude are: east longitude e, west longitude w, north latitude n, south latitude s.

1) Find out the characteristics of the weft:

All the parallels form a circle of their own, called the weft coils, and the length of the weft coils varies, the longest is the equator, which gradually shortens from the equator to the poles, until the poles shrink into a point. The parallels indicate the east-west direction, all parallel to each other, and the equator divides the earth into the northern and southern hemispheres.

2) See the annotation method of latitude and the distribution and arrangement of latitude

The latitude is calculated from the equator, the equator is set at 0 degrees, from the equator to the north pole and the south pole are divided into 90 degrees, and the north of the equator is the north latitude, the code is n; To the south is the south latitude, the code is S, 90 degrees north latitude is the North Pole, and 90 degrees south latitude is the South Pole. The dividing line between the southern and northern latitudes is the equator.

3) Special weft:

0 degrees of latitude: that is, the equator, is the longest parallel, the dividing line between the northern and southern hemispheres.

30 degrees of latitude: the dividing line between low and middle latitudes.

60 degrees latitude: the middle and high latitude dividing line of leather pants.

90 degrees of latitude: that is, the north and south poles, 90 degrees north latitude is the north pole, and 90 degrees south latitude is the south pole.

Degree latitude: The Tropic of Cancer, which is the dividing line between the tropics and the temperate zone, and the dividing line between the phenomenon of direct sunlight and the phenomenon. The northern latitude is the Tropic of Cancer, and the southern latitude is the Tropic of Capricorn.

Degree latitude: The polar circle is the dividing line between the temperate zone and the cold zone, and there is the dividing line between the polar day and the polar night phenomenon. The northern latitude is the Arctic Circle, and the southern latitude is the Antarctic Circle.

4) See the direction of the Earth's rotation

The earth rotates from west to east, and the direction of the arrow is east, and the opposite direction is west. Facing the map, up north and down south, left pure chain west and right east.

2. Longitude and longitude.

1) Find out the characteristics of the warp:

All meridians are semicircular, the length of the meridians is equal, the meridians indicate the north-south direction, all the meridians intersect at the north and south poles, two opposite meridians form a meridian coil, the sum of their degrees is 180 degrees, any meridian can divide the earth into two hemispheres.

2) See the annotation method of longitude and the law of longitude distribution and arrangement

Internationally, it is stipulated that the meridian that passes through the original site of the Greenwich Observatory in London, England is set as the 0-degree meridian, also known as the prime meridian. From the prime meridian to the east and west, each divided into 180 degrees, the east 180 degrees belong to the east longitude, the west 180 degrees belong to the west longitude, the maximum longitude is 180 degrees, and there is only one 180 degrees of longitude. The dividing line between east and west longitude is the 0 degree longitude and the 180 degree longitude.

3) Special warp:

0 degree longitude: that is, the prime meridian, which is the dividing line between east and west longitude, east is east longitude, and west is west longitude.

180 degrees longitude: It is the dividing line between east and west longitude, east is west longitude, and west is east longitude.

20 degrees west longitude: The dividing line between the eastern and western hemispheres, with the eastern hemisphere to the east and the western hemisphere to the west.

160 degrees east longitude: the dividing line between the eastern and western hemispheres, with the western hemisphere to the east and the eastern hemisphere to the west.

The thread connecting the north and south poles is called the meridian line, and the thread perpendicular to the meridian line is called the latitude line. The meridian connects the north and south poles, and the latitude is the line that points to the east and west. The meridian indicates the north-south direction, and the two meridian lines that are directly opposite each other form a meridian coil.

Each weft line forms its own circle and forms a separate weft coil. The line connecting the north and south poles is called the meridian, and the line perpendicular to the meridian is called the weft. The meridians connect the north and south poles, and the parallels point east-west.

Line. The thick line of the warp belt indicates the north-south direction, and the two meridian lines that are directly opposite each other form a warp coil. Each weft line forms its own circle and forms a separate weft coil.

The longitude and latitude lines on the figure are linear, and the horizontal and vertical longitudes are the horizontal lines, that is, the horizontal lines are the latitude lines, and the vertical lines are the meridians.

The meridian connects the north and south poles, is a semicircle, and the length is basically the same, indicating the north-south direction, east longitude is represented by e, west longitude is represented by w, the latitude is perpendicular to the meridian, is a circle, the length is different, the largest latitude coil is the equator, the smallest is the north and south poles, indicating the east-west direction, the north latitude is represented by n, and the south latitude is represented by s.

1. Parallel: 1. A circle perpendicular to the earth's axis and orbiting the earth. Features: Indicates east-west direction (perpendicular to the Earth's axis), each parallel is a circle, the length of the parallels is not equal (the equator is the longest parallel, the closer to the poles the smaller it is).

2. The latitude line is a line perpendicular to the earth's axis, which circles the earth in an east-west direction, and all latitudes are parallel and perpendicular to the meridian. Among them, the equator is the longest latitude with a latitude of 0 degrees, and the whole earth is divided into 90 parts north and south along the equator, each of which is 1 degree. Therefore, 90 degrees south latitude is the South Pole and 90 degrees north latitude is the North Pole.

Beijing, the capital of China, is located at 39 degrees north latitude.

2. Longitude: 1. A semicircle that connects the north and south poles and intersects perpendicularly with the parallel. Indicates a north-south direction (perpendicular to the equator), each meridian is a half-circle, and the meridians are all equal in length.

2. The meridian is the arc that connects the north and south poles and is perpendicular to the latitude, and any two meridians on the earth's surface are of equal length and intersect at the north and south poles. The meridian that passes through the former site of the Greenwich Observatory in London, England, is the zero degree longitude, also known as the prime meridian.

3. The whole earth is divided into 180 parts from the prime meridian to the east and west, and each meridian has its corresponding value, that is, longitude, and the difference between each meridian is 1 degree. Beijing, the capital of China, is located on the 116th longitude of east longitude.