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Registers all faces that can be built out a topology edge primitives.
The target topology is assumed to contain no self-intersecting edges.
Already known faces are recognized, so it is safe to call Polygonize multiple times on the same topology.
This function does not use nor set the next_left_edge and next_right_edge fields of the edge table.
, <xref linkend="ST_Polygonize"/>
Adds a point node to the node table in the specified topology schema and returns the nodeid of new node. If point already exists as node, the existing nodeid is returned.
Adds a point node to the node table in the specified topology schema. The <xref linkend="AddEdge"/> function automatically adds start and end points of an edge when called so not necessary to explicitly add nodes of an edge.
If any edge crossing the node is found either an exception is raised or the edge is split, depending on the <varname>allowEdgeSplitting</varname> parameter value.
If <varname>computeContainingFace</varname> is true a newly added node would get the correct containing face computed.
If the <varname>apoint</varname> geometry already exists as a node, the node is not added but the existing nodeid is returned.
, <xref linkend="CreateTopology"/>
Adds a linestring edge to the edge table and associated start and end points to the point nodes table of the specified topology schema using the specified linestring geometry and returns the edgeid of the new (or existing) edge.
Adds an edge to the edge table and associated nodes to the nodes table of the specified <varname>toponame</varname> schema using the specified linestring geometry and returns the edgeid of the new or existing record. The newly added edge has "universe" face on both sides and links to itself.
If the <varname>aline</varname> geometry crosses, overlaps, contains or is contained by an existing linestring edge, then an error is thrown and the edge is not added.
The geometry of <varname>aline</varname> must have the same <varname>srid</varname> as defined for the topology otherwise an invalid spatial reference sys error will be thrown.
is deprecated as of 3.5.0. Use <xref linkend="TopoGeo_AddLineString"/> instead.
, <xref linkend="CreateTopology"/>, <xref linkend="spatial_ref_sys"/>
<refpurpose>Registers a face primitive to a topology and gets its identifier.</refpurpose>
<para>Registers a face primitive to a topology and gets its identifier.</para>
For a newly added face, the edges forming its boundaries and the ones contained in the face will be updated to have correct values in the left_face and right_face fields. Isolated nodes contained in the face will also be updated to have a correct containing_face field value.
The target topology is assumed to be valid (containing no self-intersecting edges). An exception is raised if: The polygon boundary is not fully defined by existing edges or the polygon overlaps an existing face.
If the <varname>apolygon</varname> geometry already exists as a face, then: if <varname>force_new</varname> is false (the default) the face id of the existing face is returned; if <varname>force_new</varname> is true a new id will be assigned to the newly registered face.
When a new registration of an existing face is performed (force_new=true), no action will be taken to resolve dangling references to the existing face in the edge, node an relation tables, nor will the MBR field of the existing face record be updated. It is up to the caller to deal with that.
The <varname>apolygon</varname> geometry must have the same <varname>srid</varname> as defined for the topology otherwise an invalid spatial reference sys error will be thrown.
Returns a "simplified" geometry version of the given TopoGeometry using the Douglas-Peucker algorithm.
Returns a "simplified" geometry version of the given TopoGeometry using the Douglas-Peucker algorithm on each component edge.
The returned geometry may be non-simple or non-valid.
Splitting component edges may help retaining simplicity/validity.
Geometry <xref linkend="ST_Simplify"/>, <xref linkend="ST_IsSimple"/>, <xref linkend="ST_IsValid"/>, <xref linkend="ST_ModEdgeSplit"/>
Removes topology primitives which not needed to define existing TopoGeometry objects.
Finds all primitives (nodes, edges, faces) that are not strictly needed to represent existing TopoGeometry objects and removes them, maintaining topology validity (edge linking, face labeling) and TopoGeometry space occupation.

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  1. postgis
  2. PostGIS Manual
  3. English
is deprecated as of 3.5.0. Use <xref linkend="TopoGeo_AddLineString"/> instead.
is deprecated as of 3.5.0. Use <xref linkend="TopoGeo_AddLineString"/> instead.
4 months ago
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Tag: para
Flags
no-c-format, read-only
String age
4 months ago
Last updated
4 months ago
Source string age
4 months ago
Translation file
doc/po/templates/postgis-manual.pot, string 749