MS SQL geography.STDistance返回错误的距离 [英] Ms SQL geography.STDistance returns wrong distance

问题描述

我正在尝试查询距另一个位置指定距离内的任何位置.该查询不是问题，但由geoography.STDistance返回的距离是.

I'm trying to query any locations within a specified distance from another location. The query is not the problem, but the distance returned by geography.STDistance is.

看来STDistance对靠近赤道的位置进行了相当准确的计算，但是我需要这样做才能与北欧国家的位置配合使用.挪威，瑞典，芬兰等...

It seems STDistance makes fairly accurate calculations on locations close to the equator, but I need this to work with locations in the nordic countries. Norway, Sweden, Finland and so on...

根据我在瑞典北部地区进行的计算，该距离的误差约为2.38倍?！ 预期结果为1070米，返回距离为2537,28850694302米

According to my calculations, made on locations in northern Sweden, the distance is wrong by a factor of around 2.38?! Expected result is 1070 meters and returned distance is 2537,28850694302 meters

我的查询如下:

DECLARE @g geography = geography::STGeomFromText('POINT(65.580254 22.179428)', 4326)

SELECT name, [pos].STSrid as srdi, [pos].STDistance(@g) as d
  FROM [GPSCHAT].[dbo].[USERS]

其他位置"的坐标为(65,578541 22,202286)(存储在SRID 4326中)

and the "other location" has coordinates (65,578541 22,202286) (stored with SRID 4326)

我猜想这与距赤道的距离(靠近极圈)有关，但是必须有一种方法可以根据纬度更精确地计算出这一点，还是我错了?

I'm guessing this has to do with the distance from the equator (close to the polar circle), but there has to be a way to calculate this more accurately based on the Latitude or am i wrong?

推荐答案

似乎您正在使用'X，Y'创建点.
从文本创建点时，请改用"Y，X".

It looks like you're creating your point using 'X, Y'.
When creating a point from text, use 'Y, X' instead.

查看此 查看全文