--- title: PostGIS spatial support description: Describes PostGIS geometry, geography, dimensions, reference systems and formats with scoped Doctrine Spatial integration evidence. canonical_html: ./postgis.html canonical_markdown: ./postgis.md --- [View HTML version](./postgis.html) ## Platform and version scope **DBMS behavior:** this reference uses the [PostGIS 3.5 manual, chapter 4][manual], checked on 2026-10-11. PostgreSQL hosts the extension; the statements below concern PostGIS spatial types rather than PostgreSQL's unrelated built-in geometric types. No PostgreSQL server-version compatibility range or live test result is inferred. Integration evidence is pinned to Doctrine Spatial 6.0.0. ## Spatial behavior The vendor documents the following in chapter 4, sections 4.1–4.5: | Subject | PostGIS behavior | | -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Types | `geometry` uses a planar model; `geography` supports geodetic calculations with a smaller function/type subset. | | Geometries | Point, LineString, Polygon, their multi-types and GeometryCollection; also curves, Triangle, TIN and PolyhedralSurface. Not every operation accepts every type. | | Dimensions | Geometry coordinates can be XY, XYZ, XYM or XYZM. Storing Z/M does not mean every operation uses them. | | CRS/SRID | SRIDs identify reference systems through `spatial_ref_sys`. `ST_SetSRID` labels coordinates; `ST_Transform` changes them between reference systems. | | Formats | WKT/WKB and extended EWKT/EWKB; extended forms can carry SRID metadata. Geometry's canonical textual output is hexadecimal EWKB. | | Empty/validity | Empty geometries exist. Storage also permits invalid geometry; validity checking remains an explicit operation. | See the [vendor data model and reference-system documentation][manual] for the per-type and per-function restrictions. Geography is not interchangeable with geometry solely because both can contain a Point. ## Differences from standards **Vendor extension:** EWKT's `SRID=...;` prefix and EWKB's embedded SRID are PostGIS extensions, described in [section 4.2.1][extended]. They must not be identified as the OGC geometry WKT/WKB layouts. Compare OGC 06-103r4 clauses 7.2.2–7.2.5 and 8.2.8 through the [geometry representation reference](../standards/ogc/ogc-06-103r4.md#geometry-representations). **Scope distinction:** the vendor's planar/geodetic models and additional operations do not establish conformance of every supported feature to every [SQL/MM edition](../standards/iso/iso-iec-13249-3.md#normative-source). Curved types should not all be classified as proprietary: the separate SQL/MM reference owns their normative assessment. ## LongitudeOne integration and support **Implementation scope:** every row applies to Doctrine Spatial **6.0.0** on its PostgreSQL/PostGIS adapter. Server versions and features beyond the rows are not assessed. These records describe inspected code, not a deployment certification. | Feature | Implementation scope | Status | Limitations | Implementation decision | Extensions | Evidence | | -------------------------------------------------------------------------- | ------------------------------- | ------------------- | ------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------- | --------------------------------------------------------------- | ----------------------------------------------- | | Geometry persistence | Doctrine Spatial 6.0.0, PostGIS | Supported | Limited to the library's PHP types; no universal DBMS type coverage. | Write through `ST_GeomFromEWKT`; read through `ST_AsEWKB`. | None documented as LongitudeOne-specific; uses PostGIS formats. | [PostgreSql adapter][adapter] | | Geography persistence | Doctrine Spatial 6.0.0, PostGIS | Partially supported | PHP geography types are Point, LineString and Polygon; no claim for every native geography type. | Use `ST_GeographyFromText` and `ST_AsEWKT`; missing SRID becomes 4326. | None documented. | [Adapter][adapter], [PHP types][types] | | SRID propagation | Doctrine Spatial 6.0.0, PostGIS | Supported | Labels are transmitted; this does not transform coordinates or verify SRS validity. | Include a supplied SRID in EWKT; use subtype/SRID declarations when provided. | None documented. | [Adapter][adapter] | | XYZ, XYM, XYZM PHP persistence | Doctrine Spatial 6.0.0, PostGIS | Unsupported | The PHP Point model exposes X/Y, not Z/M. Native dimensional support does not extend this model. | Keep the released PHP model's two ordinates. | None documented. | [Point][point], [AbstractPoint][abstract-point] | | Curves, Triangle, TIN, PolyhedralSurface and GeometryCollection PHP values | Doctrine Spatial 6.0.0, PostGIS | Unsupported | No corresponding PHP classes in this release. | Supported classes are the six linear geometry families. | None documented. | [PHP type inventory][types] | | Complete EMPTY round trips | Doctrine Spatial 6.0.0, PostGIS | Not assessed | Do not infer PHP empty support from native PostGIS constructors. | No new compatibility decision made. | None documented. | [PHP type inventory][types] | ## Related references [DBMS overview](index.md), [geometry families](../concepts/geometries.md), [dimensions](../concepts/dimensions.md), [CRS/SRID](../concepts/crs.md), [formats](../concepts/formats.md) and [Doctrine Spatial 6.x usage](../doctrine-spatial/v6/index.md). [manual]: https://postgis.net/docs/manual-3.5/using_postgis_dbmanagement.html [extended]: https://postgis.net/docs/manual-3.5/using_postgis_dbmanagement.html#EWKB_EWKT [adapter]: https://github.com/longitude-one/doctrine-spatial/blob/42387d65d860b10e3a531b6b347c0e4f3025184e/lib/LongitudeOne/Spatial/DBAL/Platform/PostgreSql.php [types]: https://github.com/longitude-one/doctrine-spatial/tree/42387d65d860b10e3a531b6b347c0e4f3025184e/lib/LongitudeOne/Spatial/PHP/Types [point]: https://github.com/longitude-one/doctrine-spatial/blob/42387d65d860b10e3a531b6b347c0e4f3025184e/lib/LongitudeOne/Spatial/PHP/Types/Geometry/Point.php [abstract-point]: https://github.com/longitude-one/doctrine-spatial/blob/42387d65d860b10e3a531b6b347c0e4f3025184e/lib/LongitudeOne/Spatial/PHP/Types/AbstractPoint.php