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ST_boundingDiagonalGeometry

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返回pcpatch对象外包框对角线geometry。

语法

geometry ST_boundingDiagonalGeometry(pcpatch pc);

参数

参数名称

描述

pc

pcpatch对象。

描述

外包框对角线为ganos geometry的2D LineString对象。本函数可用在pcpatch列建索引。

示例

SELECT ST_AsText(ST_BoundingDiagonalGeometry(pa)) FROM patches;
                          st_astext
--------------------------------------------------------------
 LINESTRING Z (-126.60000000000001 45.4 40,-126.51 45.49 49)
 LINESTRING Z (-126.99000000000001 45.01 1,-126.91 45.09 9)
 LINESTRING Z (-126 46 100,-126 46 100)
 LINESTRING Z (-126.4 45.6 60,-126.31 45.69 69)
 LINESTRING Z (-126.8 45.2 20,-126.71000000000001 45.29 29)
 LINESTRING Z (-126.10000000000001 45.9 90,-126.01 45.99 99)
 LINESTRING Z (-126.3 45.7 70,-126.21000000000001 45.79 79)
 LINESTRING Z (-126.7 45.300000000000004 30,-126.61 45.39 39)
 LINESTRING Z (-126.9 45.1 10,-126.81 45.19 19)
 LINESTRING Z (-126.5 45.5 50,-126.41 45.59 59)
 LINESTRING Z (-126.2 45.800000000000004 80,-126.11 45.89 89)
(11 rows)

CREATE INDEX ON patches USING GIST(ST_BoundingDiagonalGeometry(pa) gist_geometry_ops_nd);
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