Class: LineString

ol.geom.LineString


Linestring geometry.

new ol.geom.LineString(coordinates, opt_layout)

src/ol/geom/linestring.js, line 29
Name Type Description
coordinates Array.<ol.Coordinate>

Coordinates.

layout ol.geom.GeometryLayout

Layout.

Fires:

Extends

Methods

appendCoordinate(coordinate)

src/ol/geom/linestring.js, line 68

Append the passed coordinate to the coordinates of the linestring.

Name Type Description
coordinate ol.Coordinate

Coordinate.

applyTransform(transformFn) inherited

src/ol/geom/simplegeometry.js, line 256

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 ol.TransformFunction

Transform.

changed() inherited

src/ol/observable.js, line 58

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

clone(){ol.geom.LineString}

src/ol/geom/linestring.js, line 84

Make a complete copy of the geometry.

Returns:
Clone.

dispatchEvent(event) inherited

src/ol/observable.js, line 75

Dispatches an event and calls all listeners listening for events of this type. The event parameter can either be a string or an Object with a type property.

Name Type Description
event Object | ol.events.Event | string

Event object.

forEachSegment(callback, opt_this){T|boolean}

src/ol/geom/linestring.js, line 123

Iterate over each segment, calling the provided callback. If the callback returns a truthy value the function returns that value immediately. Otherwise the function returns false.

Name Type Description
callback function

Function called for each segment.

this S

The object to be used as the value of 'this' within callback.

Returns:
Value.

get(key){*} inherited

src/ol/object.js, line 101

Gets a value.

Name Type Description
key string

Key name.

Returns:
Value.

getClosestPoint(point, opt_closestPoint){ol.Coordinate} inherited

src/ol/geom/geometry.js, line 98

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

Name Type Description
point ol.Coordinate

Point.

closestPoint ol.Coordinate

Closest point.

Returns:
Closest point.

getCoordinateAt(fraction, opt_dest){ol.Coordinate}

src/ol/geom/linestring.js, line 176

Return the coordinate at the provided fraction along the linestring. The fraction is a number between 0 and 1, where 0 is the start of the linestring and 1 is the end.

Name Type Description
fraction number

Fraction.

dest ol.Coordinate

Optional coordinate whose values will be modified. If not provided, a new coordinate will be returned.

Returns:
Coordinate of the interpolated point.

getCoordinateAtM(m, opt_extrapolate){ol.Coordinate}

src/ol/geom/linestring.js, line 143

Returns the coordinate at m using linear interpolation, or null if no such coordinate exists.

opt_extrapolate controls extrapolation beyond the range of Ms in the MultiLineString. If opt_extrapolate is true then Ms less than the first M will return the first coordinate and Ms greater than the last M will return the last coordinate.

Name Type Description
m number

M.

extrapolate boolean

Extrapolate. Default is false.

Returns:
Coordinate.

getCoordinates(){Array.<ol.Coordinate>}

src/ol/geom/linestring.js, line 160

Return the coordinates of the linestring.

Returns:
Coordinates.

getExtent(opt_extent){ol.Extent} inherited

src/ol/geom/geometry.js, line 140

Get the extent of the geometry.

Name Type Description
extent ol.Extent

Extent.

Returns:
extent Extent.

getFirstCoordinate(){ol.Coordinate} inherited

src/ol/geom/simplegeometry.js, line 111

Return the first coordinate of the geometry.

Returns:
First coordinate.

getKeys(){Array.<string>} inherited

src/ol/object.js, line 115

Get a list of object property names.

Returns:
List of property names.

getLastCoordinate(){ol.Coordinate} inherited

src/ol/geom/simplegeometry.js, line 129

Return the last coordinate of the geometry.

Returns:
Last point.

getLayout(){ol.geom.GeometryLayout} inherited

src/ol/geom/simplegeometry.js, line 139

Return the layout of the geometry.

Returns:
Layout.

getLength(){number}

src/ol/geom/linestring.js, line 188

Return the length of the linestring on projected plane.

Returns:
Length (on projected plane).

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

src/ol/object.js, line 125

Get an object of all property names and values.

Returns:
Object.

getRevision(){number} inherited

src/ol/observable.js, line 84

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

Returns:
Revision.

getType(){ol.geom.GeometryType}

src/ol/geom/linestring.js, line 225

Get the type of this geometry.

Returns:
Geometry type.

intersectsCoordinate(coordinate){boolean} inherited

src/ol/geom/geometry.js, line 112

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 ol.Coordinate

Coordinate.

Returns:
Contains coordinate.

intersectsExtent(extent){boolean}

src/ol/geom/linestring.js, line 234

Test if the geometry and the passed extent intersect.

Name Type Description
extent ol.Extent

Extent.

Returns:
true if the geometry and the extent intersect.

on(type, listener, opt_this){ol.EventsKey|Array.<ol.EventsKey>} inherited

src/ol/observable.js, line 99

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.

this Object

The object to use as this in listener.

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, opt_this){ol.EventsKey|Array.<ol.EventsKey>} inherited

src/ol/observable.js, line 124

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.

this Object

The object to use as this in listener.

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

src/ol/geom/geometry.js, line 157

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

Name Type Description
angle number

Rotation angle in radians.

anchor ol.Coordinate

The rotation center.

scale(sx, opt_sy, opt_anchor) inherited

src/ol/geom/geometry.js, line 171

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 ol.Coordinate

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

set(key, value, opt_silent) inherited

src/ol/object.js, line 150

Sets a value.

Name Type Description
key string

Key name.

value *

Value.

silent boolean

Update without triggering an event.

setCoordinates(coordinates, opt_layout)

src/ol/geom/linestring.js, line 248

Set the coordinates of the linestring.

Name Type Description
coordinates Array.<ol.Coordinate>

Coordinates.

layout ol.geom.GeometryLayout

Layout.

setProperties(values, opt_silent) inherited

src/ol/object.js, line 170

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){ol.geom.Geometry} inherited

src/ol/geom/geometry.js, line 186

Create a simplified version of this geometry. For linestrings, this uses the the 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){ol.geom.Geometry} inherited

src/ol/geom/geometry.js, line 255

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 ol.ProjectionLike

The current projection. Can be a string identifier or a ol.proj.Projection object.

destination ol.ProjectionLike

The desired projection. Can be a string identifier or a ol.proj.Projection object.

Returns:
This geometry. Note that original geometry is modified in place.

translate(deltaX, deltaY) inherited

src/ol/geom/simplegeometry.js, line 308

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, opt_this) inherited

src/ol/observable.js, line 147

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.

this Object

The object which was used as this by the listener.

unset(key, opt_silent) inherited

src/ol/object.js, line 184

Unsets a property.

Name Type Description
key string

Key name.

silent boolean

Unset without triggering an event.