Component Approved Translated Unreviewed Unfinished Unfinished words Unfinished characters Untranslated Checks Suggestions Comments
Glossary Glossary 79% 100% 34 2
PostGIS Manual CC-BY-SA-3.0 0% 94% 5,267 312 7,398 55,000 312 39 33

Summary

Project website postgis.net
Project maintainers4 User avatar robeUser avatar strkUser avatar cvvergaraUser avatar komzpa
Project reviewers13 User avatar robeUser avatar strkUser avatar cvvergaraUser avatar dkastlUser avatar komzpaUser avatar astrid_emdeUser avatar jsanzUser avatar andischiUser avatar yoichiUser avatar jefUser avatar thayerayUser avatar yellow73User avatar jonnyforest
Language French
Language code fr
Text direction Left to right
Case sensitivity Case-sensitive
Number of speakers 332,956,350
06/13/2026

String statistics

Strings percent Hosted strings Words percent Hosted words Characters percent Hosted characters
Total 5,741 99,917 715,331
Approved 0% 0 0% 0 0% 0
Waiting for review 92% 5,301 92% 92,376 92% 658,563
Translated 94% 5,429 92% 92,519 92% 660,331
Needs editing 0% 0 0% 0 0% 0
Read-only 2% 128 1% 143 1% 1,768
Failing checks 1% 41 1% 982 1% 7,515
Strings with suggestions 1% 33 1% 585 1% 4,235
Untranslated strings 5% 312 7% 7,398 7% 55,000
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The “doc/po/fr/postgis-manual.po” file was changed. 06/13/2026
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If the optional <code>gridSize</code> parameter is given (GEOS-3.9.0 or higher required), all result vertices are guaranteed to fall on a snap-rounded grid of the specified size. Note that operations performed on a grid may contain small artifacts produced during grid alignment, see <xref linkend="ST_ReducePrecision"/>.
 
06/13/2026
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For example, consider a linear dataset representing a road network. It may be required to identify all road segments that cross each other, not at a point, but in a line (perhaps to validate a business rule such as ensuring that no two different roads share a common segment). In this case <xref linkend="ST_Crosses"/> does not provide the necessary spatial filter, since for linear features it returns <varname>true</varname> only where they cross at a point.
 
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The coordinate dimension (2, 3 or 4) of the column. The coordinate dimension is at least 2, representing X and Y coordinates.
 
06/13/2026
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By default, all distance and area calculations are done on the spheroid. You should find that the results of calculations in local areas match up well with local planar results in good local projections. Over larger areas, the spheroidal calculations will be more accurate than any calculation done on a projected plane. The difference is that the spheroid takes into account the curvature and non-spherical shape of the Earth, whereas planar calculations assume a flat surface.
 
06/13/2026
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The <varname>geometry</varname> data type is <emphasis>opaque</emphasis>, which means that all access is done via invoking functions on geometry values. Functions allow creating geometry objects, accessing or updating all internal fields, and computing new geometry values. PostGIS supports all the functions specified in the OGC <link xlink:href="https://portal.ogc.org/files/?artifact_id=25354"><emphasis>Simple feature access - Part 2: SQL option</emphasis></link> (SFS) specification, as well many others. See <xref linkend="reference"/> for the full list of functions.
 
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A MultiPolygon is a collection of non-overlapping, non-adjacent Polygons. Polygons in the collection may touch only at a finite number of points. (Two polygons are adjacent if they share an edge. They touch if they share only points or edges on their boundaries). For more details on MultiPolygon validity, see <xref linkend="OGC_Validity"/>.
 
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The OGC geometry model defines validity rules for each geometry type. These rules ensure that geometry values represents realistic situations (e.g. it is possible to specify a polygon with a hole lying outside its shell, but this makes no sense geometrically and is thus invalid). PostGIS also allows storing and manipulating invalid geometry values. This allows detecting and fixing them if needed. See <xref linkend="OGC_Validity"/>
 
06/13/2026
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The geometry model allows evaluating topological spatial relationships as described in <xref linkend="DE-9IM"/>. To support this the concepts of <emphasis role="bold">interior</emphasis>, <emphasis role="bold">boundary</emphasis> and <emphasis role="bold">exterior</emphasis> are defined for each geometry type. Geometries are topologically closed, so they always contain their boundary. The boundary is a geometry of dimension one less than that of the geometry itself. For example, the boundary of a Polygon is its rings (LineStrings), the boundary of a LineString is its endpoints (Points), and the boundary of a Point is empty.
 
06/13/2026
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The geometry <emphasis role="bold">dimension</emphasis> is a property of geometry types. Point types have dimension 0, linear types have dimension 1, polygonal types have dimension 2, and solid types have dimension 3. Collections have the dimension of the maximum element dimension.
 
06/13/2026
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