ST_ShortestLine — 두 도형 사이의 2차원 최단 라인을 반환합니다.
geometry ST_ShortestLine(geometry geom1, geometry geom2);
geography ST_ShortestLine(geography geom1, geography geom2, boolean use_spheroid = true);
Returns the 2-dimensional shortest line between two geometries. The line returned starts in geom1 and ends in geom2. If geom1 and geom2 intersect the result is a line with start and end at an intersection point. The length of the line is the same as ST_Distance returns for g1 and g2.
Enhanced: 3.4.0 - support for geography.
1.5.0 버전부터 사용할 수 있습니다.
Shortest line between a Point and a LineString.
SELECT ST_ShortestLine(
'POINT (160 40)',
'LINESTRING (10 30,50 50,30 110,70 90,180 140,130 190)') As sline;
LINESTRING(160 40,125.75342465753425 115.34246575342466)
Shortest line between polygons.
SELECT ST_ShortestLine(
'POLYGON ((190 150,20 10,160 70,190 150))',
ST_Buffer('POINT(80 160)', 30)
) AS llinewkt;
LINESTRING(131.59149149528952 101.89887534906195,101.21320343559643 138.78679656440357)