STGeomFromTextPOLYGONwkt

STGeomFromText is a function commonly found in spatial database systems, particularly those implementing the OpenGIS Consortium (OGC) Simple Feature Access standard. Its primary purpose is to convert a well-known text (WKT) representation of a geometric object into its corresponding internal spatial data type. This allows users to create and manipulate geometric data using a standardized, human-readable format directly within SQL queries or application code.

The function typically accepts two arguments: the WKT string and a Spatial Reference Identifier (SRID). The SRID is crucial for defining the coordinate system in which the geometry is defined, ensuring consistency and accuracy in spatial operations. For example, a WKT string like 'POINT(1 2)' would be transformed into a point geometry with coordinates (1, 2) within the specified SRID.

Supported geometry types often include POINT, LINESTRING, POLYGON, MULTIPOINT, MULTILINESTRING, MULTIPOLYGON, and GEOMETRYCOLLECTION. The exact syntax and availability of STGeomFromText can vary slightly between different database systems, such as PostgreSQL with PostGIS, MySQL Spatial Extensions, or SQL Server Spatial types. However, the core functionality of parsing WKT and creating internal spatial objects remains consistent across these implementations. This function is fundamental for importing and working with geometric data in a structured database environment.