Class: Polygon

ol/geom/Polygon~Polygon 


import Polygon from 'ol/geom/Polygon';

Polygon geometry.

new Polygon(coordinates, opt_layout, opt_ends)

geom/Polygon.js, line 29
Name Type Description
coordinates !Array.<Array.<module:ol/coordinate~Coordinate>> | !Array.<number>

Array of linear rings that define the polygon. The first linear ring of the array defines the outer-boundary or surface of the polygon. Each subsequent linear ring defines a hole in the surface of the polygon. A linear ring is an array of vertices' coordinates where the first coordinate and the last are equivalent. (For internal use, flat coordinates in combination with opt_layout and opt_ends are also accepted.)
layout module:ol/geom/GeometryLayout

Layout.
ends Array.<number>

Ends (for internal use with flat coordinates).
Fires:

Extends

Methods

appendLinearRing(linearRing)

geom/Polygon.js, line 102

Append the passed linear ring to this polygon.

Name Type Description
linearRing module:ol/geom/LinearRing~LinearRing

Linear ring.

applyTransform(transformFn) inherited

geom/SimpleGeometry.js, line 200

Apply a transform function to each coordinate of the geometry. The geometry is modified in place. If you do not want the geometry modified in place, first clone() it and then use this function on the clone.

Name Type Description
transformFn module:ol/proj~TransformFunction

Transform.

changed() inherited

Observable.js, line 36

Increases the revision counter and dispatches a 'change' event.

clone(){module:ol/geom/Polygon~Polygon}

geom/Polygon.js, line 118

Make a complete copy of the geometry.

Returns:
Clone.

get(key){*} inherited

Object.js, line 119

Gets a value.

Name Type Description
key string

Key name.
Returns:
Value.

getArea(){number}

geom/Polygon.js, line 151

Return the area of the polygon on projected plane.

Returns:
Area (on projected plane).

getClosestPoint(point, opt_closestPoint){module:ol/coordinate~Coordinate} inherited

geom/Geometry.js, line 106

Return the closest point of the geometry to the passed point as coordinate.

Name Type Description
point module:ol/coordinate~Coordinate

Point.
closestPoint module:ol/coordinate~Coordinate

Closest point.
Returns:
Closest point.

getExtent(opt_extent){module:ol/extent~Extent} inherited

geom/Geometry.js, line 139

Get the extent of the geometry.

Name Type Description
extent module:ol/extent~Extent

Extent.
Returns:
extent Extent.

getFirstCoordinate(){module:ol/coordinate~Coordinate} inherited

geom/SimpleGeometry.js, line 65

Return the first coordinate of the geometry.

Returns:
First coordinate.

getInteriorPoint(){module:ol/geom/Point~Point}

geom/Polygon.js, line 210

Return an interior point of the polygon.

Returns:
Interior point as XYM coordinate, where M is the length of the horizontal intersection that the point belongs to.

getKeys(){Array.<string>} inherited

Object.js, line 132

Get a list of object property names.

Returns:
List of property names.

getLastCoordinate(){module:ol/coordinate~Coordinate} inherited

geom/SimpleGeometry.js, line 81

Return the last coordinate of the geometry.

Returns:
Last point.

getLayout(){module:ol/geom/Geometry~GeometryLayout} inherited

geom/SimpleGeometry.js, line 90

Return the layout of the geometry.

Returns:
Layout.

getLinearRing(index){module:ol/geom/LinearRing~LinearRing}

geom/Polygon.js, line 235

Return the Nth linear ring of the polygon geometry. Return null if the given index is out of range. The exterior linear ring is available at index 0 and the interior rings at index 1 and beyond.

Name Type Description
index number

Index.
Returns:
Linear ring.

getLinearRingCount(){number}

geom/Polygon.js, line 221

Return the number of rings of the polygon, this includes the exterior ring and any interior rings.

Returns:
Number of rings.

getLinearRings(){Array.<module:ol/geom/LinearRing~LinearRing>}

geom/Polygon.js, line 248

Return the linear rings of the polygon.

Returns:
Linear rings.

getProperties(){Object.<string, *>} inherited

Object.js, line 141

Get an object of all property names and values.

Returns:
Object.

getRevision(){number} inherited

Observable.js, line 47

Get the version number for this object. Each time the object is modified, its version number will be incremented.

Returns:
Revision.

getType(){module:ol/geom/GeometryType}

geom/Polygon.js, line 300

Get the type of this geometry.

Returns:
Geometry type.

intersectsCoordinate(coordinate){boolean} inherited

geom/Geometry.js, line 119

Returns true if this geometry includes the specified coordinate. If the coordinate is on the boundary of the geometry, returns false.

Name Type Description
coordinate module:ol/coordinate~Coordinate

Coordinate.
Returns:
Contains coordinate.

intersectsExtent(extent){boolean}

geom/Polygon.js, line 308

Test if the geometry and the passed extent intersect.

Name Type Description
extent module:ol/extent~Extent

Extent.
Returns:
true if the geometry and the extent intersect.

on(type, listener){module:ol/events~EventsKey|Array.<module:ol/events~EventsKey>} inherited

Observable.js, line 60

Listen for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.
Returns:
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

once(type, listener){module:ol/events~EventsKey|Array.<module:ol/events~EventsKey>} inherited

Observable.js, line 82

Listen once for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.
Returns:
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

rotate(angle, anchor) inherited

geom/Geometry.js, line 155

Rotate the geometry around a given coordinate. This modifies the geometry coordinates in place.

Name Type Description
angle number

Rotation angle in radians.
anchor module:ol/coordinate~Coordinate

The rotation center.

scale(sx, opt_sy, opt_anchor) inherited

geom/Geometry.js, line 170

Scale the geometry (with an optional origin). This modifies the geometry coordinates in place.

Name Type Description
sx number

The scaling factor in the x-direction.
sy number

The scaling factor in the y-direction (defaults to sx).
anchor module:ol/coordinate~Coordinate

The scale origin (defaults to the center of the geometry extent).

set(key, value, opt_silent) inherited

Object.js, line 164

Sets a value.

Name Type Description
key string

Key name.
value *

Value.
silent boolean

Update without triggering an event.

setProperties(values, opt_silent) inherited

Object.js, line 183

Sets a collection of key-value pairs. Note that this changes any existing properties and adds new ones (it does not remove any existing properties).

Name Type Description
values Object.<string, *>

Values.
silent boolean

Update without triggering an event.

simplify(tolerance){module:ol/geom/Geometry~Geometry} inherited

geom/Geometry.js, line 184

Create a simplified version of this geometry. For linestrings, this uses the the href="https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm">https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm Douglas Peucker algorithm. For polygons, a quantization-based simplification is used to preserve topology.

Name Type Description
tolerance number

The tolerance distance for simplification.
Returns:
A new, simplified version of the original geometry.

transform(source, destination){module:ol/geom/Geometry~Geometry} inherited

geom/Geometry.js, line 258

Transform each coordinate of the geometry from one coordinate reference system to another. The geometry is modified in place. For example, a line will be transformed to a line and a circle to a circle. If you do not want the geometry modified in place, first clone() it and then use this function on the clone.

Name Type Description
source module:ol/proj~ProjectionLike

The current projection. Can be a string identifier or a module:ol/proj/Projection~Projection object.
destination module:ol/proj~ProjectionLike

The desired projection. Can be a string identifier or a module:ol/proj/Projection~Projection object.
Returns:
This geometry. Note that original geometry is modified in place.

translate(deltaX, deltaY) inherited

geom/Geometry.js, line 239

Translate the geometry. This modifies the geometry coordinates in place. If instead you want a new geometry, first clone() this geometry.

Name Type Description
deltaX number

Delta X.
deltaY number

Delta Y.

un(type, listener) inherited

Observable.js, line 101

Unlisten for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.

unset(key, opt_silent) inherited

Object.js, line 195

Unsets a property.

Name Type Description
key string

Key name.
silent boolean

Unset without triggering an event.