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postgresql计算两点距离

jpa中写法，加上::geography转化经纬度的坐标计算，\\作为转译符

@Query(value = "select f from bc_contact f where f.data_end='2' and " +            " ST_Distance(ST_SetSRID(f.point,4326)\\:\\:geography," +            " ST_SetSRID(ST_MakePoint(:lon,:lat),4326)\\:\\:geography) < :distance ",nativeQuery = true)    List
   
     nearbyList(@Param("lon") double lon,@Param("lat") double lat,@Param("distance") double distance) ;
   

 

 

下面两种方法：

select 

ST_Distance(     ST_SetSRID(ST_MakePoint(115.97166453999147,28.716493914230423),4326)::geography,     ST_SetSRID(ST_MakePoint(106.00231199774656,29.719258550486572),4326)::geography ), ST_Length(     ST_MakeLine(         ST_MakePoint(115.97166453999147,28.716493914230423),         ST_MakePoint(106.00231199774656,29.719258550486572)     )::geography ) 备注：

ST_GeomFromText('LINESTRING(115.97166453999147 28.716493914230423,106.00231199774656 29.719258550486572)')与

ST_MakeLine(     ST_MakePoint(115.97166453999147,28.716493914230423),     ST_MakePoint(106.00231199774656,29.719258550486572) )等价

ST_GeomFromText('POINT(115.97166453999147 28.716493914230423)',4326)与

ST_SetSRID(ST_MakePoint(115.97166453999147,28.716493914230423),4326)等价

ST_SetSRID(ST_MakePoint(115.97166453999147,28.716493914230423),4326)::geography与

Geography(ST_SetSRID(ST_MakePoint(115.97166453999147,28.716493914230423),4326))、 ST_GeographyFromText('SRID=4326;POINT(115.97166453999147 28.716493914230423)')等价 (::geography是postgis中的转换类型语法,把geometry转成geography)

 

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