sql SERVER 根据地图经纬度计算距离的公式
<div class="codetitle"><a style="CURSOR: pointer" data="85717" class="copybut" id="copybut85717" onclick="doCopy('code85717')"> 代码如下:@H_301_3@<div class="codebody" id="code85717">
go
--创建经纬度距离计算函数
CREATEFUNCTION [dbo].[fnGetDistance]
--LatBegin 开始经度
--LngBegin 开始维度
(@LatBegin REAL,@LngBegin REAL,@LatEnd REAL,@LngEnd REAL)
RETURNSFLOAT
AS
BEGIN
--距离(千米)
DECLARE @Distance REAL
DECLARE @EARTH_RADIUS REAL
SET @EARTH_RADIUS = 6378.137 DECLARE @RadLatBegin REAL,
@RadLatEnd REAL,
@RadLatDiff REAL,
@RadLngDiff REAL SET @RadLatBegin = @LatBegin PI()/ 180.0
SET @RadLatEnd = @LatEnd PI()/ 180.0
SET @RadLatDiff = @RadLatBegin - @RadLatEnd
SET @RadLngDiff = @LngBegin PI()/ 180.0 - @LngEnd PI()/ 180.0 SET @Distance = 2 ASIN(
SQRT(
POWER(SIN(@RadLatDiff / 2),2)+COS(@RadLatBegin)COS(@RadLatEnd)
POWER(SIN(@RadLngDiff / 2),2)
)
) SET @Distance = @Distance @EARTHRADIUS
--SET @Distance = Round(@Distance * 10000) / 10000 RETURN @Distance
END @Distance的单位为:千米
@H301_3@