ST_OrientedEnvelope — 返回包含几何图形的最小面积矩形。
geometry
ST_OrientedEnvelope
(
geometry
geom
)
;
SELECT ST_AsText(ST_OrientedEnvelope('MULTIPOINT ((0 0), (-1 -1), (3 2))'));
st_astext
------------------------------------------------
POLYGON((3 2,2.88 2.16,-1.12 -0.84,-1 -1,3 2))
点和线串的定向包络。
SELECT ST_AsText(ST_OrientedEnvelope(
ST_Collect(
ST_GeomFromText('LINESTRING(55 75,125 150)'),
ST_Point(20, 80))
)) As wktenv;
wktenv
-----------
POLYGON((19.9999999999997 79.9999999999999,33.0769230769229 60.3846153846152,138.076923076924 130.384615384616,125.000000000001 150.000000000001,19.9999999999997 79.9999999999999))