WKT

E427692

WKT (Well-Known Text) is a text-based markup language used to represent vector geometry objects such as points, lines, and polygons in geographic information systems.

All labels observed (1)

Label Occurrences
WKT canonical 1

How this entity was disambiguated

Statements (48)

Predicate Object
instanceOf geometry representation standard
geospatial data format
text-based markup language
advantage easy to debug and inspect
human-readable geometry representation
alternativeBinaryForm Well-Known Binary
category GIS standard
geospatial vector format
coordinateOrder x y (longitude latitude in many GIS contexts)
dataModel vector geometry
domain geographic information systems
geospatial software
spatial databases
example LINESTRING (30 10, 10 30, 40 40)
POINT (30 10)
POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10))
fullName Well-Known Text
geometryTypeKeyword GEOMETRYCOLLECTION
LINESTRING
MULTILINESTRING
MULTIPOINT
MULTIPOLYGON
POINT
POLYGON
hasConcept empty geometries (e.g., POINT EMPTY)
geometry collections of mixed types
limitation less compact than binary formats
no inherent topology model
relatedStandard Simple Feature Access NERFINISHED
WKB
serializationFormat plain text
standardizedBy Open Geospatial Consortium NERFINISHED
supportsDimension 2D coordinates
3D coordinates
measured coordinates (M)
supportsSRID yes (via external or extended conventions)
syntaxFeature geometry type followed by coordinate tuples in parentheses
usedFor representing geometry collections
representing line strings
representing multi-part geometries
representing points
representing polygons
representing vector geometry objects
usedIn GIS file formats and APIs
PostGIS NERFINISHED
spatial SQL databases
version WKT for Coordinate Reference Systems
WKT for Simple Features

How these facts were elicited

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

PostGIS supportsFormat WKT