2012-05-20

Google地图地理经纬度坐标查询 DMS度分秒MinDec小数分DegDec小数分转换


经纬度坐标
赤道纬度(0°N)
东经正数,西经为负数
北纬为正数,南纬为负数。

通常表示地理坐标系时,前面是纬度后面是经度,
LAT.latitude,纬度
LON.longitude,经度
coordinate坐标

Google地图查看经纬度
地图上点鼠标右键,弹出右键菜单,选择最下面的“这儿是什么?”,即会在输入框中显示当前位置的小数格式坐标,有六位小数,前为纬度后经度。

在线转换经纬度:小数格式经纬度和度数格式经纬度转换
http://www.zhongguosou.com/zonghe/dili_jingweidu.html    @Troy at MSCBSC
其实换算也挺简单,经纬度的度分秒类似于时间的时分秒,比率都是60.

Mimee国外英语版的在线转换工具。
http://80calcs.pagesperso-orange.fr/Downloads/Mimee_online.html
Mimee is a program which can convert geographical coordinates between various datums and formats
D.ddd DegDec,degres decimal 小数度
D.MMmm MinDec,minute decimal 小数分
D.MMSSss DMS,degree minute second 度分秒

Geographic coordinate system
A geographic coordinate system is a coordinate system that enables every location on the Earth to be specified by a set of numbers.A common choice of coordinates is latitude, longitude and elevation.
地理坐标系统是一个能够使地球上第一个位置用一套数字来指定坐标系统。坐标的一般选择是纬度、经度和海拔。
The latitude (abbreviation: Lat., φ, or phi)
The Longitude (abbreviation: Long., λ, or lambda)
from:http://en.wikipedia.org/wiki/Geographic_coordinate_system

There are three basic forms of a coordinate.
Coordinate containing degrees (integer), minutes (integer), and seconds (integer, or real number) (DMS).
Coordinate containing degrees (integer) and minutes (real number) (MinDec).
Coordinate containing only degrees (real number) (DegDec).
All forms of coordinates are capable of representing the same amount of data and the same precision. Depending on which type of coordinate you are provided with, and which type you would like to work with, you may have to do some conversion.
http://en.wikipedia.org/wiki/Geographic_coordinate_conversion
有三种格式的坐标。
1.DMS 包含度(整数)、分(整数)和秒(整数或者实数)的坐标
2.MinDec 包含度(整数)、分(实数)的坐标
3.DegDec 仅包含度(实数)
所有格式的坐标能够代表相同数量的数据和相同的精度。针对你提供的坐标类型和你想要的类型,你需要做一些转换。
Conversion from DMS to Decimal Degree
Conversion from MinDec to Decimal Degree
Conversion from Decimal Degree to DMS

DMS,degree minute second 度分秒
MinDec,minute decimal 小数分
DegDec,degres decimal 小数度

GRS 80, or Geodetic Reference System 1980, is a geodetic reference system consisting of a global reference ellipsoid and a gravity field model.
WGS.World Geodetic System 世界坐标系
GPS所采用的坐标系是美国国防部1984世界坐标系,简称WGS-84。

A latitude of 0°0′0″ is neither North nor South. Similarly, a longitude of 0°0′0″ is neither East nor West. These are referred to as zero latitude or zero longitude.
0度0分0秒纬度,既不是北纬还是南纬。同样地,0度0分0秒经度,既不是东经也不是西经。它们被称作0度经度或0度纬度。

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