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PostGIS 1.5.8 Manual165 / 310ExamplesIn each of the following illustrations, the blue dot represents the centroid of the source geometry.Centroid of a MULTIPOINTCentroid of a LINESTRINGCentroid of a POLYGONCentroid of a GEOMETRYCOLLECTIONSELECT ST_AsText(ST_Centroid(’MULTIPOINT ( -1 0, -1 2, -1 3, -1 4, -1 7, 0 1, 0 3, 1 1, 20, 6 0, 7 8, 9 8, 10 6 )’));st_astext------------------------------------------POINT(2.30769230769231 3.30769230769231)(1 row)←↪
PostGIS 1.5.8 Manual166 / 310See AlsoST_PointOnSurface7.8.4 ST_ClosestPointST_ClosestPoint — Returns the 2-dimensional point on g1 that is closest to g2. This is the first point of the shortest line.Synopsisgeometry ST_ClosestPoint(geometry g1, geometry g2);DescriptionReturns the 2-dimensional point on g1 that is closest to g2. This is the first point of the shortest line.Availability: 1.5.0Examples
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