Class: Polyline

Extends

• ol.format.TextFeature

Methods

ol.format.Polyline.decodeDeltas(encoded, stride, opt_factor){Array.<number>}

src/ol/format/polyline.js, line 102

Decode a list of n-dimensional points from an encoded string

Name	Type	Description
encoded	string	An encoded string.
stride	number	The number of dimension of the points in the encoded string.
factor	number	The factor by which the resulting numbers will be divided. Default is 1e5.

Returns:

A list of n-dimensional points.

ol.format.Polyline.decodeFloats(encoded, opt_factor){Array.<number>}

src/ol/format/polyline.js, line 159

Decode a list of floating point numbers from an encoded string

Name	Type	Description
encoded	string	An encoded string.
factor	number	The factor by which the result will be divided. Default is 1e5.

Returns:

A list of floating point numbers.

ol.format.Polyline.encodeDeltas(numbers, stride, opt_factor){string}

src/ol/format/polyline.js, line 67

Encode a list of n-dimensional points and return an encoded string

Attention: This function will modify the passed array!

Name	Type	Description
numbers	Array.<number>	A list of n-dimensional points.
stride	number	The number of dimension of the points in the list.
factor	number	The factor by which the numbers will be multiplied. The remaining decimal places will get rounded away. Default is 1e5.

Returns:

The encoded string.

ol.format.Polyline.encodeFloats(numbers, opt_factor){string}

src/ol/format/polyline.js, line 139

Encode a list of floating point numbers and return an encoded string

Attention: This function will modify the passed array!

Name	Type	Description
numbers	Array.<number>	A list of floating point numbers.
factor	number	The factor by which the numbers will be multiplied. The remaining decimal places will get rounded away. Default is 1e5.

Returns:

The encoded string.

readFeature(source, opt_options){ol.Feature}

src/ol/format/polyline.js, line 276

Read the feature from the Polyline source. The coordinates are assumed to be in two dimensions and in latitude, longitude order.

Name	Type	Description
source	Document | Node | Object | string	Source.
options	Read options. Name Type Description dataProjection ol.ProjectionLike Projection of the data we are reading. If not provided, the projection will be derived from the data (where possible) or the defaultDataProjection of the format is assigned (where set). If the projection can not be derived from the data and if no defaultDataProjection is set for a format, the features will not be reprojected. extent ol.Extent Tile extent of the tile being read. This is only used and required for ol.format.MVT. Required. featureProjection ol.ProjectionLike Projection of the feature geometries created by the format reader. If not provided, features will be returned in the dataProjection.

Returns:

Feature.

readFeatures(source, opt_options){Array.<ol.Feature>}

src/ol/format/polyline.js, line 298

Read the feature from the source. As Polyline sources contain a single feature, this will return the feature in an array.

Name	Type	Description
source	Document | Node | Object | string	Source.
options	Read options. Name Type Description dataProjection ol.ProjectionLike Projection of the data we are reading. If not provided, the projection will be derived from the data (where possible) or the defaultDataProjection of the format is assigned (where set). If the projection can not be derived from the data and if no defaultDataProjection is set for a format, the features will not be reprojected. extent ol.Extent Tile extent of the tile being read. This is only used and required for ol.format.MVT. Required. featureProjection ol.ProjectionLike Projection of the feature geometries created by the format reader. If not provided, features will be returned in the dataProjection.

Returns:

Features.

readGeometry(source, opt_options){ol.geom.Geometry}

src/ol/format/polyline.js, line 319

Read the geometry from the source.

Name	Type	Description
source	Document | Node | Object | string	Source.
options	Read options. Name Type Description dataProjection ol.ProjectionLike Projection of the data we are reading. If not provided, the projection will be derived from the data (where possible) or the defaultDataProjection of the format is assigned (where set). If the projection can not be derived from the data and if no defaultDataProjection is set for a format, the features will not be reprojected. extent ol.Extent Tile extent of the tile being read. This is only used and required for ol.format.MVT. Required. featureProjection ol.ProjectionLike Projection of the feature geometries created by the format reader. If not provided, features will be returned in the dataProjection.

Returns:

Geometry.

readProjection(source){ol.proj.Projection}

src/ol/format/polyline.js, line 349

Read the projection from a Polyline source.

Name	Type	Description
source	Document | Node | Object | string	Source.

Returns:

Projection.

writeGeometry(geometry, opt_options){string}

src/ol/format/polyline.js, line 383

Write a single geometry in Polyline format.

Name	Type	Description
geometry	ol.geom.Geometry	Geometry.
options	Write options. Name Type Description dataProjection ol.ProjectionLike Projection of the data we are writing. If not provided, the defaultDataProjection of the format is assigned (where set). If no defaultDataProjection is set for a format, the features will be returned in the featureProjection. featureProjection ol.ProjectionLike Projection of the feature geometries that will be serialized by the format writer. If not provided, geometries are assumed to be in the dataProjection if that is set; in other words, they are not transformed. rightHanded boolean | undefined When writing geometries, follow the right-hand rule for linear ring orientation. This means that polygons will have counter-clockwise exterior rings and clockwise interior rings. By default, coordinates are serialized as they are provided at construction. If true, the right-hand rule will be applied. If false, the left-hand rule will be applied (clockwise for exterior and counter-clockwise for interior rings). Note that not all formats support this. The GeoJSON format does use this property when writing geometries. decimals number | undefined Maximum number of decimal places for coordinates. Coordinates are stored internally as floats, but floating-point arithmetic can create coordinates with a large number of decimal places, not generally wanted on output. Set a number here to round coordinates. Can also be used to ensure that coordinates read in can be written back out with the same number of decimals. Default is no rounding.

Returns:

Geometry.