數(shù)據(jù)庫實(shí)用腳本:計算地球上兩個坐標(biāo)點(diǎn)之間的里程
作者:數(shù)據(jù)庫技術(shù)分享社區(qū)
今天給大家分享計算地球上兩個坐標(biāo)點(diǎn)之間里程不同數(shù)據(jù)庫版本的腳本。
今天給大家分享計算地球上兩個坐標(biāo)點(diǎn)之間里程不同數(shù)據(jù)庫版本的腳本。
1、SQLServer腳本
- –-計算地球上兩個坐標(biāo)點(diǎn)(經(jīng)度,緯度)之間距離sql函數(shù)
- CREATE FUNCTION [dbo].[fnGetDistance](@LatBegin REAL, @LngBegin REAL,
- @LatEnd REAL, @LngEnd REAL)
- RETURNS FLOAT
- AS
- BEGIN
- –-距離(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 * @EARTH_RADIUS
- RETURN @Distance
- END
- --使用方法如下:
- SELECT dbo.fnGetDistance(25,30,12.56,15.5) ;
2、MySQl腳本
- –-計算地球上兩個坐標(biāo)點(diǎn)(經(jīng)度,緯度)之間距離sql函數(shù)
- CREATE FUNCTION [dbo].[fnGetDistance](@LatBegin REAL, @LngBegin REAL,
- @LatEnd REAL, @LngEnd REAL)
- RETURNS FLOAT
- AS
- BEGIN
- –-距離(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 * @EARTH_RADIUS
- RETURN @Distance
- END
- --使用方法如下:
- SELECT dbo.fnGetDistance(25,30,12.56,15.5) ;
3、Orcale腳本
- CREATE OR REPLACE FUNCTION GetDistance
- (lat1 number, lng1 number,lat2 number,lng2 number)
- RETURN NUMBER is
- earth_padius number := 6378.137;
- radLat1 number := Radian(lat1);
- radLat2 number := Radian(lat2);
- a number := radLat1 - radLat2;
- b number := Radian(lng1) - Radian(lng2);
- s number := 0;
- begin
- s := 2 *
- Asin(Sqrt(power(sin(a / 2), 2) +
- cos(radLat1) * cos(radLat2) * power(sin(b / 2), 2)));
- s := s * earth_padius;
- s := Round(s * 10000) / 10000;
- return s;
- end;
- --使用方法
- select GetDistance(25,30,12.56,15.5) from dual
責(zé)任編輯:華軒
來源:
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