Methods to convert longitude and latitude into degrees, minutes and seconds:

1. The integer part of longitude and latitude is the degree in degrees, minutes and seconds.

2. The integer part obtained by multiplying the decimal part of longitude and latitude by 60 is the minute in degrees, minutes and seconds.

3. Then use the decimal part of the last longitude and latitude × 60 to get the seconds in degrees, minutes and seconds.

For example: 29.73784595, 103.5863933 converted into degrees, minutes and seconds is: N29°44′16.25″ north latitude, E103°35′11.02″ east longitude.

Latitudes and longitudes are auxiliary lines assumed by humans for the convenience of measurement. They are defined as the trajectory formed by a certain point on the earth's surface as the earth rotates. Each latitude line is circular and parallel.

The length of a latitude line is the circumference of the equator multiplied by the cosine of the latitude of the latitude line, so the equator is the longest. The farther away from the equator, the shorter the circumference, and it shrinks to 0 at the poles. From the equator to the north and south, each divided by 90°, is called north latitude and south latitude, represented by "N" and "S" respectively.

Extended information:

East longitude is a positive number and west longitude is a negative number. Longitude is the number of degrees east or west of a point on Earth from a north-south line called the prime meridian. The longitude of the prime meridian is 0°, and the longitude of other places on the earth is from 180° to the east or 180° to the west. Unlike latitude, which has the equator as a natural starting point, longitude does not have a natural starting point. The line that serves as the prime meridian is chosen by humans.

On the globe, the longitude and latitude lines form a graticule; if the graticule globe is unfolded, a flat map will be formed. Determining the location is useful in aviation, aerospace, navigation and meteorology. "How to rescue a ship when it encounters danger at sea" and so on, all use the latitude and longitude map.

Longitude: In order to distinguish each longitude line on the earth, people mark the longitude line with a degree, which is the longitude. There is 1 time zone for every 15 degrees of longitude. Longitude is actually the angle between two planes of longitude. Internationally, the longitude passing through the original site of the Greenwich Observatory in London, the capital of the United Kingdom, is designated as the 0° longitude, also called the prime meridian.

Counting from 0° longitude, 180° is divided into east and west. The 180° to the east belongs to the east longitude. It is customary to use "E" as the code name. The 180° to the west belongs to the west longitude. It is customary to use "W" as the code name. The 180° east longitude and the 180° west longitude coincide on a longitude line, which is the east-west longitude 180°. Latitude: Measured north from the equator as "north latitude" (N); measured south as "southern latitude" (S).

When interpreting longitude on a map, please note: from west to east, the longitude in ascending order is east longitude; from west to east, the longitude in ascending order is west longitude; divide by 0° Except for the 180° longitude, all other longitudes can accurately distinguish between east longitude and west longitude.

Baidu Encyclopedia - Latitude and Longitude

Baidu Encyclopedia - Degrees, Minutes and Seconds

Baidu Encyclopedia - Latitude