Well-known text (WKT) is a text markup language for representing vector geometry objects. A WKT string represents a geometry object such as a point, line, polygon, or multi-geometry object, along with its spatial reference system. It is a human-readable format designed for exchanging spatial data between different systems and applications. WKT is commonly used in geographic information systems (GIS), databases with spatial extensions, and other applications that deal with spatial data. The format specifies the geometry type, followed by the coordinates that define the geometry. For example, a point is represented as POINT (x y), a line string as LINESTRING (x1 y1, x2 y2, ..., xn yn), and a polygon as POLYGON ((x1 y1, x2 y2, ..., xn yn, x1 y1), ...). The coordinates are typically expressed as decimal numbers. WKT is a widely supported standard, making it a valuable tool for interoperability in the geospatial domain.