GeographyPolygon class

Represents a geographic polygon (exterior ring + optional holes) for PostGIS.

Implemented types

• Geography

Available extensions

• GeographyPolygonJsonExtension

Constructors

GeographyPolygon({required List<GeographyPoint> exteriorRing, List<List<GeographyPoint>> holes = const [], int srid = Geography.defaultSrid})

Creates a new GeographyPolygon.

const

GeographyPolygon.fromBinary(Uint8List bytes)

Creates a GeographyPolygon from its EWKB binary representation as returned by PostgreSQL for geography columns.

factory

Properties

exteriorRing → List<GeographyPoint>

Exterior ring — ordered list of points that close the polygon.

final

hashCode → int

The hash code for this object.

no setter, override

holes → List<List<GeographyPoint>>

Interior rings (holes), each a closed list of points.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

srid → int

Spatial reference system identifier. Defaults to WGS 84 (EPSG:4326).

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toEwkt() → String

Returns the EWKT representation for PostGIS, e.g. SRID=4326;POINT(-0.12 51.5).

override

toJson() → String

Available on GeographyPolygon, provided by the GeographyPolygonJsonExtension extension

Returns the EWKT representation as a String.

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override