[SCM] PostGIS branch master updated. 3.5.0-296-ge7270fd02
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commit e7270fd02ec1a50d3840b875fbb01334f19caa8e
Author: Sandro Santilli <strk at kbt.io>
Date: Mon Apr 28 19:18:30 2025 +0200
ValidateTopologyPrecision & MakeTopologyPrecise functions
Closes #5890
Includes regression test and documentation
diff --git a/NEWS b/NEWS
index 082c60ce9..28471efa8 100644
--- a/NEWS
+++ b/NEWS
@@ -16,6 +16,7 @@ PostGIS 3.6.0
* New Features *
+ - #5890, ValidateTopologyPrecision, MakeTopologyPrecise (Sandro Santilli)
- #5861, Add --drop-topology switch to pgtopo_import (Sandro Santilli)
- #1247, ST_AsRasterAgg (Sandro Santilli)
- #5784, GT-223 Export circ_tree_distance_tree_internal for mobilitydb use
diff --git a/doc/extras_topology.xml b/doc/extras_topology.xml
index 560f1b5ee..71f4e9cda 100644
--- a/doc/extras_topology.xml
+++ b/doc/extras_topology.xml
@@ -964,6 +964,126 @@ relation table of the topology.
</refsection>
</refentry>
+ <refentry xml:id="ValidateTopologyPrecision">
+ <refnamediv>
+ <refname>ValidateTopologyPrecision</refname>
+
+ <refpurpose>Returns non-precise vertices in the topology.</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>geometry <function>ValidateTopologyPrecision</function></funcdef>
+ <paramdef><type>name </type> <parameter>toponame</parameter></paramdef>
+ <paramdef choice="opt"><type>geometry</type> <parameter>bbox</parameter></paramdef>
+ <paramdef choice="opt"><type>float8</type> <parameter>gridSize</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsection>
+ <title>Description</title>
+
+ <para>
+Returns all vertices that are not rounded to the topology or given
+<varname>gridSize</varname> as a puntal geometry, optionally limiting
+the check to the area specified by the <varname>bbox</varname> parameter.
+ </para>
+
+ <!-- use this format if new function -->
+ <para role="availability" conformance="3.6.0">Availability: 3.6.0</para>
+ </refsection>
+
+
+ <refsection>
+ <title>Examples</title>
+ <programlisting>
+SELECT ST_AsEWKT(g) FROM
+ topology.ValidateTopologyPrecision(
+ 'city_data',
+ gridSize => 2,
+ bbox => ST_MakeEnvelope(0,0,20,20)
+) g;
+ st_asewkt
+----------------------
+ MULTIPOINT(9 6,9 14)
+(1 row)
+ </programlisting>
+ </refsection>
+
+ <refsection>
+ <title>See Also</title>
+ <para>
+<xref linkend="MakeTopologyPrecise"/>
+ </para>
+ </refsection>
+ </refentry>
+
+ <refentry xml:id="MakeTopologyPrecise">
+ <refnamediv>
+ <refname>MakeTopologyPrecise</refname>
+
+ <refpurpose>Snap topology vertices to precision grid.</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>void <function>MakeTopologyPrecise</function></funcdef>
+ <paramdef><type>name </type> <parameter>toponame</parameter></paramdef>
+ <paramdef choice="opt"><type>geometry</type> <parameter>bbox</parameter></paramdef>
+ <paramdef choice="opt"><type>float8</type> <parameter>gridSize</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsection>
+ <title>Description</title>
+
+ <para>
+Snaps all vertices of a topology to the topology precision grid or to
+the grid whose size is specified with the <varname>gridSize</varname>
+parameter, optionally limiting the operation to the objects
+intersecting the area specified by the <varname>bbox</varname> parameter.
+ </para>
+
+<note>
+<para>
+Snapping could make the topology invalid, so it is recommended to
+check the outcome of operation with <xref
+linkend="ValidateTopology"/>.
+</para>
+</note>
+
+ <!-- use this format if new function -->
+ <para role="availability" conformance="3.6.0">Availability: 3.6.0</para>
+ </refsection>
+
+
+ <refsection>
+ <title>Examples</title>
+ <programlisting>
+SELECT topology.MakeTopologyPrecise(
+ 'city_data',
+ gridSize => 2
+);
+ maketopologyprecise
+---------------------
+
+(1 row)
+ </programlisting>
+ </refsection>
+
+ <refsection>
+ <title>See Also</title>
+ <para>
+<xref linkend="ValidateTopologyPrecision"/>,
+<xref linkend="ValidateTopology"/>
+ </para>
+ </refsection>
+ </refentry>
+
<refentry xml:id="FindTopology">
<refnamediv>
<refname>FindTopology</refname>
diff --git a/topology/Makefile.in b/topology/Makefile.in
index ef8de4bb9..0339a5dee 100644
--- a/topology/Makefile.in
+++ b/topology/Makefile.in
@@ -142,10 +142,12 @@ topology.sql: \
sql/manage/FindLayer.sql.in \
sql/manage/FindTopology.sql.in \
sql/manage/ManageHelper.sql.in \
+ sql/manage/MakeTopologyPrecise.sql.in \
sql/manage/populate_topology_layer.sql.in \
sql/manage/RenameTopology.sql.in \
sql/manage/TopologySummary.sql.in \
sql/manage/ValidateTopologyRelation.sql.in \
+ sql/manage/ValidateTopologyPrecision.sql.in \
sql/manage/ValidateTopology.sql.in \
sql/topoelement/topoelement_agg.sql.in \
sql/topogeometry/type.sql.in \
diff --git a/topology/sql/manage/MakeTopologyPrecise.sql.in b/topology/sql/manage/MakeTopologyPrecise.sql.in
new file mode 100644
index 000000000..24cf395ac
--- /dev/null
+++ b/topology/sql/manage/MakeTopologyPrecise.sql.in
@@ -0,0 +1,107 @@
+-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+--
+--
+-- PostGIS - Spatial Types for PostgreSQL
+-- http://postgis.net
+--
+-- Copyright (C) 2025 Sandro Santilli <strk at kbt.io>
+--
+-- This is free software; you can redistribute and/or modify it under
+-- the terms of the GNU General Public Licence. See the COPYING file.
+--
+-- Author: Sandro Santilli <strk at kbt.io>
+--
+-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+-- {
+-- Invalidities are represented by any vertex that does not fall on
+-- the topology precision grid.
+-- }{
+CREATE OR REPLACE FUNCTION topology.MakeTopologyPrecise(toponame name, bbox GEOMETRY DEFAULT NULL, gridSize float8 DEFAULT NULL)
+RETURNS void AS
+$BODY$
+DECLARE
+ topo topology.topology;
+ imprecisePoints GEOMETRY;
+ sql TEXT;
+ dataBox GEOMETRY;
+ dataMagnitude FLOAT8;
+ minGridSize FLOAT8;
+BEGIN
+ topo := findTopology(toponame);
+ IF topo.id IS NULL THEN
+ RAISE EXCEPTION 'Could not find topology "%"', toponame;
+ END IF;
+
+ IF gridSize IS NULL THEN
+ gridSize := topo.precision;
+ END IF;
+
+ IF gridSize <= 0 THEN
+ RAISE NOTICE 'Every vertex is precise with grid size %', gridSize;
+ RETURN;
+ END IF;
+
+ -- TODO: compute real extent instead of estimated/float4 one?
+ -- TODO: generalize a topology.MinTolerance(toponame) ?
+ SELECT ST_Union(g) b
+ FROM (
+ SELECT ST_EstimatedExtent(topo.name, 'edge_data', 'geom')::geometry g
+ UNION
+ SELECT ST_EstimatedExtent(topo.name, 'node', 'geom')::geometry
+ ) foo
+ INTO dataBox;
+
+ IF dataBox IS NULL THEN
+ RAISE NOTICE 'Every vertex is precise in an empty topology';
+ RETURN;
+ END IF;
+
+ dataMagnitude = greatest(
+ abs(ST_Xmin(dataBox)),
+ abs(ST_Xmax(dataBox)),
+ abs(ST_Ymin(dataBox)),
+ abs(ST_Ymax(dataBox))
+ );
+ -- TODO: restrict data magnitude computation to requested bbox ?
+ minGridSize := topology._st_mintolerance(dataMagnitude);
+ IF minGridSize > gridSize THEN
+ RAISE EXCEPTION 'Presence of max ordinate value % requires a minimum grid size of %', dataMagnitude, minGridSize;
+ END IF;
+
+ -- TODO: recursively grow working bbox to include all edges connected
+ -- to all endpoints of edges intersecting it ?
+
+ sql := format(
+ $$
+UPDATE %1$I.edge_data
+SET geom = ST_SnapToGrid(geom, $2)
+WHERE ( $1 IS NULL OR geom && $1 )
+ $$, topo.name
+ );
+ EXECUTE sql USING bbox, gridSize;
+
+ sql := format(
+ $$
+UPDATE %1$I.node
+SET geom = ST_SnapToGrid(geom, $2)
+WHERE ( $1 IS NULL OR geom && $1 )
+ $$, topo.name
+ );
+ EXECUTE sql USING bbox, gridSize;
+
+ sql := format(
+ $$
+UPDATE %1$I.face
+SET mbr = ST_SnapToGrid(mbr, $2)
+WHERE ( $1 IS NULL OR mbr && $1 )
+ $$, topo.name
+ );
+ EXECUTE sql USING bbox, gridSize;
+
+ -- TODO: validate topology if requested ?
+
+END;
+$BODY$
+LANGUAGE 'plpgsql' VOLATILE; --}
+
diff --git a/topology/sql/manage/ValidateTopologyPrecision.sql.in b/topology/sql/manage/ValidateTopologyPrecision.sql.in
new file mode 100644
index 000000000..dc480dad7
--- /dev/null
+++ b/topology/sql/manage/ValidateTopologyPrecision.sql.in
@@ -0,0 +1,106 @@
+-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+--
+--
+-- PostGIS - Spatial Types for PostgreSQL
+-- http://postgis.net
+--
+-- Copyright (C) 2025 Sandro Santilli <strk at kbt.io>
+--
+-- This is free software; you can redistribute and/or modify it under
+-- the terms of the GNU General Public Licence. See the COPYING file.
+--
+-- Author: Sandro Santilli <strk at kbt.io>
+--
+-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+-- {
+-- Invalidities are represented by any vertex that does not fall on
+-- the topology precision grid.
+-- }{
+CREATE OR REPLACE FUNCTION topology.ValidateTopologyPrecision(toponame name, bbox geometry DEFAULT NULL, gridSize float8 DEFAULT NULL)
+RETURNS geometry AS
+$BODY$
+DECLARE
+ topo topology.topology;
+ imprecisePoints GEOMETRY;
+ sql TEXT;
+ dataBox GEOMETRY;
+ dataMagnitude FLOAT8;
+ minGridSize FLOAT8;
+BEGIN
+
+ topo := findTopology(toponame);
+ IF topo.id IS NULL THEN
+ RAISE EXCEPTION 'Could not find topology "%"', toponame;
+ END IF;
+
+ IF gridSize IS NULL THEN
+ gridSize := topo.precision;
+ END IF;
+
+ imprecisePoints = ST_SetSRID('MULTIPOINT EMPTY'::geometry, topo.srid);
+
+ IF gridSize <= 0 THEN
+ RAISE NOTICE 'Every vertex is precise with grid size %', gridSize;
+ RETURN imprecisePoints;
+ END IF;
+
+ SELECT ST_Union(g) b
+ FROM (
+ SELECT ST_EstimatedExtent(topo.name, 'edge_data', 'geom')::geometry g
+ UNION
+ SELECT ST_EstimatedExtent(topo.name, 'node', 'geom')::geometry
+ ) foo
+ INTO dataBox;
+
+ IF dataBox IS NULL THEN
+ RAISE NOTICE 'Every vertex is precise in an empty topology';
+ RETURN imprecisePoints;
+ END IF;
+
+ dataMagnitude = greatest(
+ abs(ST_Xmin(dataBox)),
+ abs(ST_Xmax(dataBox)),
+ abs(ST_Ymin(dataBox)),
+ abs(ST_Ymax(dataBox))
+ );
+ -- TODO: restrict data magnitude computation to given bbox ?
+ minGridSize := topology._st_mintolerance(dataMagnitude);
+ IF minGridSize > gridSize THEN
+ RAISE EXCEPTION 'Presence of max ordinate value % requires a minimum grid size of %', dataMagnitude, minGridSize;
+ END IF;
+
+ sql := format(
+ $$
+WITH edgePoints AS (
+ SELECT geom FROM (
+ SELECT (ST_DumpPoints(geom)).geom FROM %1$I.edge
+ WHERE ( $1 IS NULL OR geom && $1 )
+ ) foo
+ WHERE ( $1 IS NULL OR geom && $1 )
+), isolatedNodes AS (
+ SELECT geom FROM %1$I.node
+ WHERE containing_face IS NOT NULL
+ AND ( $1 IS NULL OR geom && $1 )
+), allVertices AS (
+ SELECT geom from edgePoints
+ UNION
+ SELECT geom from isolatedNodes
+)
+SELECT ST_Union(geom) FROM allVertices
+WHERE NOT ST_Equals( ST_ReducePrecision(geom, $2), geom )
+ $$,
+ topo.name
+ );
+
+ EXECUTE sql USING bbox, gridSize
+ INTO imprecisePoints;
+
+ -- Return invalid vertices
+
+ RETURN imprecisePoints;
+
+END;
+
+$BODY$
+LANGUAGE 'plpgsql' STABLE; --}
diff --git a/topology/sql/populate.sql.in b/topology/sql/populate.sql.in
index 9abd6780a..e947c9d1e 100644
--- a/topology/sql/populate.sql.in
+++ b/topology/sql/populate.sql.in
@@ -28,15 +28,25 @@
-- 3.5527136788005009294e-15 for the starting value of 9.0
--
-- }{
+CREATE OR REPLACE FUNCTION topology._st_mintolerance(val float8)
+ RETURNS float8
+AS $$
+ SELECT 3.6 * power(10, - ( 15 - log(val) ));
+$$ LANGUAGE 'sql' IMMUTABLE STRICT;
+-- }
+
+-- {
+-- Get min tolerance for a given geometry
+-- }{
CREATE OR REPLACE FUNCTION topology._st_mintolerance(ageom Geometry)
RETURNS float8
AS $$
- SELECT 3.6 * power(10, - ( 15 - log(coalesce(
+ SELECT topology._st_mintolerance(coalesce(
nullif(
- greatest(abs(ST_xmin($1)), abs(ST_ymin($1)),
- abs(ST_xmax($1)), abs(ST_ymax($1))),
+ greatest(abs(ST_Xmin($1)), abs(ST_Ymin($1)),
+ abs(ST_Xmax($1)), abs(ST_Ymax($1))),
0),
- 1)) ));
+ 1));
$$ LANGUAGE 'sql' IMMUTABLE STRICT;
-- }
diff --git a/topology/test/regress/maketopologyprecise.sql b/topology/test/regress/maketopologyprecise.sql
new file mode 100644
index 000000000..0469816b4
--- /dev/null
+++ b/topology/test/regress/maketopologyprecise.sql
@@ -0,0 +1,16 @@
+SET client_min_messages TO NOTICE;
+SELECT NULL FROM topology.CreateTopology('topo');
+SELECT topology.MakeTopologyPrecise('topo');
+UPDATE topology.topology SET precision = 5 WHERE name = 'topo';
+SELECT topology.MakeTopologyPrecise('topo');
+SELECT NULL FROM topology.TopoGeo_addLineString('topo', 'LINESTRING(123456789 0.1, 6 -1002003004)');
+SELECT topology.MakeTopologyPrecise('topo', gridSize => 1e-10);
+SELECT 'start', 'e', edge_id, ST_AsEWKT(geom) FROM topo.edge ORDER BY edge_id;
+SELECT topology.MakeTopologyPrecise('topo');
+SELECT 'prec5', 'e', edge_id, ST_AsEWKT(geom) FROM topo.edge ORDER BY edge_id;
+
+-- TODO: test bbox limited made-precise topology
+
+-- Cleanup
+
+SELECT NULL FROM topology.DropTopology('topo');
diff --git a/topology/test/regress/maketopologyprecise_expected b/topology/test/regress/maketopologyprecise_expected
new file mode 100644
index 000000000..e7bfc4063
--- /dev/null
+++ b/topology/test/regress/maketopologyprecise_expected
@@ -0,0 +1,7 @@
+NOTICE: Every vertex is precise with grid size 0
+NOTICE: Every vertex is precise in an empty topology
+ERROR: Presence of max ordinate value 1002003008 requires a minimum grid size of 3.60721082879999e-6
+start|e|1|LINESTRING(123456789 0.1,6 -1002003004)
+prec5|e|1|LINESTRING(123456790 0,5 -1002003005)
+NOTICE: Dropping all layers from topology 'topo' (1)
+NOTICE: drop cascades to 6 other objects
diff --git a/topology/test/regress/validatetopologyprecision.sql b/topology/test/regress/validatetopologyprecision.sql
new file mode 100644
index 000000000..7aeb57c76
--- /dev/null
+++ b/topology/test/regress/validatetopologyprecision.sql
@@ -0,0 +1,54 @@
+\set VERBOSITY terse
+set client_min_messages to WARNING;
+
+-- Create a topology in floating precision model
+SELECT NULL FROM topology.CreateTopology('topo', 4326);
+
+-- Add a linestring on a grid of size 2
+SELECT NULL FROM topology.TopoGeo_AddLineString('topo',
+ ST_Segmentize('SRID=4326;LINESTRING(0 0, 8 0)'::geometry, 2));
+
+-- Add a connected linestring on a grid of size 2
+SELECT NULL FROM topology.TopoGeo_AddLineString('topo',
+ ST_Segmentize('SRID=4326;LINESTRING(8 0, 8 8)'::geometry, 2));
+
+-- Add an isolated node on a grid of size 1
+SELECT NULL FROM topology.TopoGeo_AddPoint('topo',
+ 'SRID=4326;POINT(-3 -1)'::geometry);
+
+SELECT 'start', 'edge', edge_id, ST_AsEWKT(geom) FROM topo.edge ORDER BY edge_id;
+SELECT 'start', 'node', node_id, ST_AsEWKT(geom) FROM topo.node WHERE containing_face IS NOT NULL ORDER BY node_id;
+
+-- Validate as such
+SELECT 'topo_float', ST_AsEWKT(ST_Normalize(
+ topology.ValidateTopologyPrecision('topo')
+));
+
+-- Update topology precision to 4
+UPDATE topology.topology SET precision = 4 WHERE name = 'topo';
+
+-- Validate with precision 4
+SELECT 'topo_prec4', ST_AsEWKT(ST_Normalize(
+ topology.ValidateTopologyPrecision('topo')
+));
+
+-- Validate with precision 4 and limited bbox
+SELECT 'topo_prec4_bbox', ST_AsEWKT(ST_Normalize(
+ topology.ValidateTopologyPrecision(
+ 'topo',
+ 'LINESTRING(-1 -1,7 7)'::geometry
+ )
+));
+
+-- Validate with gridSize 2
+SELECT 'topo_prec2', ST_AsEWKT(ST_Normalize(
+ topology.ValidateTopologyPrecision('topo', gridSize => 2)
+));
+
+-- Validate with too small gridSize
+SELECT 'topo_prec_too_small', ST_AsEWKT(ST_Normalize(
+ topology.ValidateTopologyPrecision('topo', gridSize => 1e-20)
+));
+
+SELECT NULL FROM topology.DropTopology('topo');
+
diff --git a/topology/test/regress/validatetopologyprecision_expected b/topology/test/regress/validatetopologyprecision_expected
new file mode 100644
index 000000000..fa60e3737
--- /dev/null
+++ b/topology/test/regress/validatetopologyprecision_expected
@@ -0,0 +1,8 @@
+start|edge|1|SRID=4326;LINESTRING(0 0,2 0,4 0,6 0,8 0)
+start|edge|2|SRID=4326;LINESTRING(8 0,8 2,8 4,8 6,8 8)
+start|node|4|SRID=4326;POINT(-3 -1)
+topo_float|SRID=4326;MULTIPOINT EMPTY
+topo_prec4|SRID=4326;MULTIPOINT(8 6,8 2,6 0,2 0,-3 -1)
+topo_prec4_bbox|SRID=4326;MULTIPOINT(6 0,2 0)
+topo_prec2|SRID=4326;POINT(-3 -1)
+ERROR: Presence of max ordinate value 8 requires a minimum grid size of 2.88e-14
diff --git a/topology/test/tests.mk b/topology/test/tests.mk
index cbe263369..3776692c1 100644
--- a/topology/test/tests.mk
+++ b/topology/test/tests.mk
@@ -45,6 +45,7 @@ TESTS += \
$(top_srcdir)/topology/test/regress/legacy_predicate.sql \
$(top_srcdir)/topology/test/regress/legacy_query.sql \
$(top_srcdir)/topology/test/regress/legacy_validate.sql \
+ $(top_srcdir)/topology/test/regress/maketopologyprecise.sql \
$(top_srcdir)/topology/test/regress/polygonize.sql \
$(top_srcdir)/topology/test/regress/populate_topology_layer.sql \
$(top_srcdir)/topology/test/regress/removeunusedprimitives.sql \
@@ -87,5 +88,6 @@ TESTS += \
$(top_srcdir)/topology/test/regress/topojson.sql \
$(top_srcdir)/topology/test/regress/topologysummary.sql \
$(top_srcdir)/topology/test/regress/totopogeom.sql \
+ $(top_srcdir)/topology/test/regress/validatetopologyprecision.sql \
$(top_srcdir)/topology/test/regress/validatetopologyrelation.sql \
$(top_srcdir)/topology/test/regress/validatetopology.sql
diff --git a/topology/topology.sql.in b/topology/topology.sql.in
index 849963e4c..c2ba6f303 100644
--- a/topology/topology.sql.in
+++ b/topology/topology.sql.in
@@ -1401,6 +1401,8 @@ LANGUAGE 'plpgsql' VOLATILE STRICT;
#include "sql/manage/RenameTopology.sql.in"
#include "sql/manage/ValidateTopology.sql.in"
#include "sql/manage/ValidateTopologyRelation.sql.in"
+#include "sql/manage/ValidateTopologyPrecision.sql.in"
+#include "sql/manage/MakeTopologyPrecise.sql.in"
-- Cleanup functions
#include "sql/cleanup/RemoveUnusedPrimitives.sql.in"
-----------------------------------------------------------------------
Summary of changes:
NEWS | 1 +
doc/extras_topology.xml | 120 +++++++++++++++++++++
topology/Makefile.in | 2 +
topology/sql/manage/MakeTopologyPrecise.sql.in | 107 ++++++++++++++++++
.../sql/manage/ValidateTopologyPrecision.sql.in | 106 ++++++++++++++++++
topology/sql/populate.sql.in | 18 +++-
topology/test/regress/maketopologyprecise.sql | 16 +++
topology/test/regress/maketopologyprecise_expected | 7 ++
.../test/regress/validatetopologyprecision.sql | 54 ++++++++++
.../regress/validatetopologyprecision_expected | 8 ++
topology/test/tests.mk | 2 +
topology/topology.sql.in | 2 +
12 files changed, 439 insertions(+), 4 deletions(-)
create mode 100644 topology/sql/manage/MakeTopologyPrecise.sql.in
create mode 100644 topology/sql/manage/ValidateTopologyPrecision.sql.in
create mode 100644 topology/test/regress/maketopologyprecise.sql
create mode 100644 topology/test/regress/maketopologyprecise_expected
create mode 100644 topology/test/regress/validatetopologyprecision.sql
create mode 100644 topology/test/regress/validatetopologyprecision_expected
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