postgresql计算两点距离（经纬度地理位置）

转自：https://blog.csdn.net/xinshijimanon/article/details/80522919

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<BcContact> 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)

转载自：https://blog.csdn.net/seapeak007/article/details/83059638