描述

将面基本体注册到拓扑并获取其标识符。

对于新添加的面，形成其边界的边和面中包含的边将被更新，以便在Left_Face和Right_Face字段中具有正确的值。面中包含的隔离节点也将更新为具有正确的CONTINING_FACE字段值。

假设目标拓扑有效(不包含自交边)。如果存在以下情况，则会引发异常：多边形边界未完全由现有边定义，或者该多边形与现有面重叠。

如果 apolygon 几何体已作为面存在，则：如果 force_new 为FALSE(默认值)，则返回现有面的面ID；如果为 force_new 如果是真的，将为新注册的人脸分配新的ID。

可用性：2.0.0

示例

-- first add the edges we use generate_series as an iterator (the below
-- will only work for polygons with < 10000 points because of our max in gs)
SELECT topology.AddEdge('ma_topo', ST_MakeLine(ST_PointN(geom,i), ST_PointN(geom, i + 1) )) As edgeid
    FROM (SELECT  ST_NPoints(geom) AS npt, geom
            FROM
                (SELECT ST_Boundary(ST_GeomFromText('POLYGON((234896.5 899456.7,234914 899436.4,234946.6 899356.9,234872.5 899328.7,
                234891 899285.4,234992.5 899145, 234890.6 899069,234755.2 899255.4,
                234612.7 899379.4,234776.9 899563.7,234896.5 899456.7))', 26986) )  As geom
            )  As geoms) As facen CROSS JOIN generate_series(1,10000) As i
         WHERE i < npt;
-- result --
 edgeid
--------
      3
      4
      5
      6
      7
      8
      9
     10
     11
     12
(10 rows)
-- then add the face -

SELECT topology.AddFace('ma_topo',
    ST_GeomFromText('POLYGON((234896.5 899456.7,234914 899436.4,234946.6 899356.9,234872.5 899328.7,
    234891 899285.4,234992.5 899145, 234890.6 899069,234755.2 899255.4,
    234612.7 899379.4,234776.9 899563.7,234896.5 899456.7))', 26986) ) As faceid;
-- result --
faceid
--------
 1

另请参阅

AddEdge , CreateTopology , Section 4.5, “空间参考系”