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Posted on April 19, 2022 (Updated on July 9, 2025)

What is Srid in PostGIS?

Natural Environments

SRID. The ID of the spatial reference system used for the coordinate geometry in this table. It is a foreign key reference to the SPATIAL_REF_SYS .

What is SRID in Postgres?

A spatial reference identifier (SRID) is a unique identifier associated with a specific coordinate system, tolerance, and resolution.

What is use of SRID?

The SRID is used to tell which spatial reference system will be used to interpret each spatial object. A common SRID in use is 4326, which represents spatial data using longitude and latitude coordinates on the Earth’s surface as defined in the WGS84 standard, which is also used for the Global Positioning System (GPS).

What is SRID in MySQL?

In MySQL, the SRID value is an integer associated with the geometry value. The maximum usable SRID value is 232−1. If a larger value is given, only the lower 32 bits are used. SRID 0 represents an infinite flat Cartesian plane with no units assigned to its axes.

What does SRID 0 mean?

no SRID

A SRID of 0 doesn’t technically exist, it just means no SRID — ie, the default if you forget to set it.

Are SRID and Epsg the same?

An EPSG code represents information such as a specific ellipsoid, unit, geographic coordinate system, or projected coordinate system. SRID stands for a spatial reference identifier, which is a parameter in the OGC standard and is consistent with an EPSG code.

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