Class: LinearRing

var points = [new SuperMap.Geometry.Point(4933.319287022352, -3337.3849141502124),
     new SuperMap.Geometry.Point(4960.9674060199022, -3349.3316322355736),
     new SuperMap.Geometry.Point(5006.0235999418364, -3358.8890067038628),
     new SuperMap.Geometry.Point(5075.3145648369318, -3378.0037556404409),
     new SuperMap.Geometry.Point(5305.19551436013, -3376.9669111768926)],
var linearRing = new SuperMap.Geometry.LinearRing(points);

Extends

• SuperMap.Geometry.LineString

Members

boundsSuperMap.Bounds

Bounds of the geometric object.

componentsArray.<SuperMap.Geometry>

The component parts of this geometry.

componentTypeArray.<string>

The geometry format array supported by geometry object on the components storage.

Default Value:

["SuperMap.Geometry.Point", "SuperMap.PointWithMeasure"]

var geometry= new SuperMap.Geometry();
  geometry. SRID=4326;

Methods

addComponent(point, index){boolean}

LinearRing.js, line 34

Adds a point to geometry components. If the point is to be added to the end of the components array and it is the same as the last point already in that array, the duplicate point is not added. This has the effect of closing the ring if it is not already closed, and doing the right thing if it is already closed. This behavior can be overridden by calling the method with a non-null index as the second argument.

Name	Type	Description
point	SuperMap.Geometry.Point	Point Object.
index	integer	optional Index into the array to insert the component

Returns:

Type	Description
boolean	Was the Point successfully added.

inherited addComponents(components)

Collection.js, line 103

Add components to this geometry.

Name	Type	Description
components	Array.<SuperMap.Geometry>	An array of geometries to add.

Example

var collection = new SuperMap.Geometry.Collection();
collection.addComponents(new SuerpMap.Geometry.Point(10,10));

inherited addPoint(point, index)

MultiPoint.js, line 29

Add a point that encapsulates the SuperMap.Geometry.Collection.addComponent method.

Name	Type	Description
point	SuperMap.Geometry.Point	Point to be added
index	number	optional Optional index.

inherited calculateBounds()

Collection.js, line 82

Recalculate the bounds by traversing array, Call the extend method when traversing each subitem.

inherited clearBounds()

Geometry.js, line 82

clear bounds of the geometric object. If the object has a parent class, it also clears the bounds of the parent class geometry object.

inherited clone(){SuperMap.Geometry.Collection}

Collection.js, line 52

Clone this geometry.

Returns:

Type	Description
SuperMap.Geometry.Collection	An exact clone of this collection.

inherited destroy()

Collection.js, line 42

Destroy this geometry.

inherited equals(geometry){boolean}

Collection.js, line 197

Determine whether another geometry is equivalent to this one. Geometries are considered equivalent if all components have the same coordinates.

Name	Type	Description
geometry	SuperMap.Geometry	The geometry to determined.

Returns:

Type	Description
boolean	Whether the input geometry is equal to the current geometry.

inherited extendBounds(newBounds)

Geometry.js, line 95

Extend the existing bounds to include the new bounds. If geometry's bounds is not yet set, then set a new Bounds.

Name	Type	Description
newBounds	SuperMap.Bounds	New bounds.

getArea(){float}

LinearRing.js, line 83

The area is positive if the ring is oriented CW, otherwise it will be negative.

Returns:

Type	Description
float	The signed area for a ring.

inherited getBounds(){SuperMap.Bounds}

Geometry.js, line 112

Gets the boundary of the geometric graphic. If not set, it can be acquired through computing.

Returns:

Type	Description
SuperMap.Bounds	Returns the bounds of the geometry.

inherited getComponentsString(){string}

Collection.js, line 69

Get the components string.

Returns:

Type	Description
string	the components string.

inherited getSortedSegments(){Array}

LineString.js, line 40

Returns:

Type	Description
Array	An array of segment objects. Segment objects have properties x1, y1, x2, and y2. The start point is represented by x1 and y1. The end point is represented by x2 and y2. Start and end are ordered so that x1 < x2.

getVertices(nodes){Array}

LinearRing.js, line 102

Return a list of all points in this geometry.

Name	Type	Description
nodes	boolean	optional For lines, only return vertices that are endpoints. If false, for lines, only vertices that are not endpoints will be returned. If not provided, all vertices will be returned.

Returns:

Type	Description
Array	A list of all vertices in the geometry.

removeComponent(point){boolean}

LinearRing.js, line 62

Removes a point from geometry components.

Name	Type	Description
point	SuperMap.Geometry.Point	Point Object.

Returns:

Type	Description
boolean	The component was removed.

inherited removeComponents(components){boolean}

Collection.js, line 151

Remove components from this geometry.

Name	Type	Description
components	Array.<SuperMap.Geometry>	The components to be removed.

Returns:

Type	Description
boolean	Whether or not the components is removed successfully.

inherited removePoint(point)

MultiPoint.js, line 40

Remove the point and encapsulate the SuperMap.Geometry.Collection.removeComponent method.

Name	Type	Description
point	SuperMap.Geometry.Point	Point to be removed.

inherited setBounds(bounds)

Geometry.js, line 70

Set bounds of the geometric object.

Name	Type	Description
bounds	SuperMap.Bounds	bounds.