title: "sys.spatial_reference_systems (Transact-SQL) | Microsoft Docs" ms.custom: "" ms.date: "06/10/2016" ms.prod: sql ms.prod_service: "database-engine, sql-database" ms.component: "system-catalog-views" ms.reviewer: "" ms.suite: "sql" ms.technology: system-objects ms.tgt_pltfrm: "" ms.topic: "language-reference" f1_keywords:
- "spatial_reference_systems_TSQL"
- "sys.spatial_reference_systems_TSQL"
- "sys.spatial_reference_systems"
- "spatial_reference_systems" dev_langs:
- "TSQL" helpviewer_keywords:
- "sys.spatial_reference_systems catalog view"
- "spatial_reference_systems" ms.assetid: 3c9bc120-67c3-463f-9e24-29fd623f25a0 caps.latest.revision: 11 author: stevestein ms.author: sstein manager: craigg monikerRange: "=azuresqldb-current||>=sql-server-2016||=sqlallproducts-allversions||>=sql-server-linux-2017"
[!INCLUDEtsql-appliesto-ss2008-asdb-xxxx-xxx-md]
Lists the spatial reference systems (SRIDs) supported by [!INCLUDEssNoVersion].
| Column name | Data type | Description |
|---|---|---|
| spatial_reference_id | int | The SRID supported by [!INCLUDEssNoVersion]. |
| authority_name | nvarchar(128) | The authority of the SRID. |
| authorized_spatial_reference_id | int | The SRID given by the authority named in authority_name. |
| well_known_text | nvarchar(4000) | The WKT representation of the SRID. |
| unit_of_measure | nvarchar(128) | The name of the unit of measure. |
| unit_conversion_factor | float | The length of the unit of measure in meters. |
[!INCLUDEssCatViewPerm]