The formula should be: longitude and latitude in any decimal number. The integer is the degree, and the fractional part is the score in the integer part of the number obtained by multiplying the decimal part by 60, multiply the decimal part of the number by 60
The number is the number of seconds. For example, the number of degrees converted from 36.12432314 to second is: the number of degrees is "36", and the value is an integer of "0.12432314 × 60 = 7.4593884" 7 ", the second is "0.4593884 × 60 = 27.5639304", "27.6" ---- 36 ° 7' 27.6 seconds 〃. Calculation principle: retain the entire part, decimal number x 60 longitude: 14 ° 0.32 × 60 = 19.2 -- "19' 0.2 × 60 = 1.2 --" 1.2 degrees 〃
That is, the same is true for the 14° 19'12 period, and the latitude is 52.20 = 52 ° 12' 0. Reprinted from http://www.cnblogs.com/kaixin110/archive/2008/09/12/1290139.html Longitude and latitude Representation
The International longitude Conference 1884 stipulates that the longitude line passing through the Greenwich Mean Observatory in London is 0 °. From 0 ° the longitude line to the east is called the east longitude, to the west is called the west longitude, and to the east and west are divided into 180 °. It is customary that the Earth is divided into East and West hemisphere by 20 ° and the east longitude by 160 °. If the earth is cut into North and South half from the center of the earth axis, the upper half is called the northern hemisphere, and the lower half is called the southern hemisphere. This plane to be split is called the runway. The line between the equator and the Earth's surface is called the equator. The weft is getting shorter and shorter from the equator to the Pole, and it is reduced to a point at the pole. Scientists set the equator to 0 ° weft, which is divided into 90 ° from the equator to the pole. The south of the equator is called the south latitude, and the North is called the north latitude. Frequent use, minute, second, and degree of latitude and longitude on a computer or GPS. degrees, points. minutes, seconds. in seconds. The hexadecimal value between degrees, minutes, And seconds is 60. degrees, points. minutes, seconds. in seconds, the hexadecimal value is 100. Pay attention to the conversion. It can be considered that the distance between each latitude is a constant of 111 KM, 1.85 km per minute, and 31.8 m per second. The longitude distance gradually decreases with the increase of latitude. You can use the following formula to calculate it:
Longitude 1 ° length = 111.413cos Phi 0.094cos3 Phi km (latitude PHI ).
Generally, the data obtained from GPS is the longitude and latitude. There are multiple Representation Methods for longitude and latitude.
1 .)
Ddd. ddddd, decimal fractional part of degree. degree (5 digits) for example: 31.12035 °
2.) DDD. Mm. Mmm, degree. Points.
Decimal decimal part (3 digits) such as 31 ° 10. 335'
3.) DDD. Mm. SS, degree. Minute. Second example
31 ° 12 '42"
Any fixed point on the earth can be expressed by a definite latitude and longitude. Reprint from http://bbs.shincogps.com/viewthread.php? Tid = 23788 |
