OGC Simple Features

WKT Geometry Types

Direct Definition:Well-Known Text (WKT) is the OGC Simple Features text encoding for vector geometry. The standard defines seven types: three single geometries (POINT, LINESTRING, POLYGON), three multi-part collections of those (MULTIPOINT, MULTILINESTRING, MULTIPOLYGON), and GEOMETRYCOLLECTION, which can hold any mixture of the other six. Every type below has its own reference page with syntax rules, a valid example you can render on a map, the mistake that most often breaks it, and PostGIS and Shapely recipes.

All seven geometry types

POLYGON

A WKT POLYGON represents a planar surface defined by 1 exterior linear boundary ring and 0 or more interior boundary rings (islands or holes). The first and last coordinate of every ring must match identically to close the polygon.

POLYGON ((x1 y1, x2 y2, x3 y3, ..., x1 y1), (hole_x1 hole_y1, ...))

MULTIPOLYGON

A WKT MULTIPOLYGON represents a collection of independent polygon surfaces (such as islands in an archipelago or disconnected cadastral parcels) grouped as a single spatial feature.

MULTIPOLYGON (((poly1_ext), (poly1_hole)), ((poly2_ext)))

LINESTRING

A WKT LINESTRING represents a continuous path composed of 1 or more connected linear segments defined by at least 2 coordinate points (e.g. roads, flight paths, pipeline routes, or GPS traces).

LINESTRING (x1 y1, x2 y2, x3 y3, ...)

MULTILINESTRING

A WKT MULTILINESTRING represents a collection of linear paths grouped as one feature, commonly used for river networks with tributaries or disconnected road segments.

MULTILINESTRING ((line1_p1, line1_p2), (line2_p1, line2_p2))

POINT

A WKT POINT represents a single 2D or 3D location in space. In standard GIS and PostGIS conventions (EPSG:4326), it is written with longitude (X) first and latitude (Y) second.

POINT (longitude latitude)

MULTIPOINT

A WKT MULTIPOINT represents a collection of individual points treated as a single feature (e.g. sensor clusters, address nodes, or scatter points).

MULTIPOINT ((x1 y1), (x2 y2), (x3 y3)) or MULTIPOINT (x1 y1, x2 y2)

GEOMETRYCOLLECTION

A WKT GEOMETRYCOLLECTION contains any arbitrary combination of 0 or more valid geometries (such as combining a POINT and a POLYGON into a single spatial entity).

GEOMETRYCOLLECTION (POINT(x y), LINESTRING(x1 y1, x2 y2), POLYGON((...)))

Work with WKT

WKT ViewerPaste any geometry and see it on a map Geometry ConverterWKT ⇄ GeoJSON ⇄ WKB Hex What is WKT?Format explained with examples SRID 4326 & axis orderWhy your coordinates come out swapped