ST_MakePoint

ST_MakePoint
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Name

ST_MakePoint — Creates a 2D, 3DZ or 4D Point.

Synopsis

geometry ST_Point(float x_lon, float y_lat);

geometry ST_MakePointM(float x, float y, float m);

geometry ST_MakePoint(double precision x, double precision y, double precision z, double precision m);

설명

주어진 포인트 도형들로 정의되는 BOX2D를 생성합니다.

Use ST_MakePointM to make points with XYM coordinates.

While not OGC-compliant, ST_MakePoint is faster and more precise than ST_GeomFromText and ST_PointFromText. It is also easier to use for numeric coordinate values.


	For geodetic coordinates, `X` is longitude and `Y` is latitude

This function supports 3d and will not drop the z-index.

예시

--Return point with unknown SRID
SELECT ST_MakePoint(-71.1043443253471, 42.3150676015829);

--Return point marked as WGS 84 long lat
SELECT ST_SetSRID(ST_MakePoint(-71.1043443253471, 42.3150676015829),4326);

--Return a 3D point (e.g. has altitude)
SELECT ST_MakePoint(1, 2,1.5);

--Get z of point
SELECT ST_Z(ST_MakePoint(1, 2,1.5));
result
-------
1.5

참고

ST_GeomFromText, ST_PointFromText, ST_SetSRID, ST_MakePointM