OpenLayers

Class: KML

ol/format/KML~KML 


import KML from 'ol/format/KML';

Feature format for reading and writing data in the KML format.

module:ol/format/KML~KML#readFeature will read the first feature from a KML source.

MultiGeometries are converted into GeometryCollections if they are a mix of geometry types, and into MultiPoint/MultiLineString/MultiPolygon if they are all of the same type.

Note that the KML format uses the URL() constructor. Older browsers such as IE which do not support this will need a URL polyfill to be loaded before use.

new KML(opt_options)

format/KML.js, line 402
Name Type Description
options

Options.

Name Type Default Description
extractStyles boolean true

Extract styles from the KML.
showPointNames boolean true

Show names as labels for placemarks which contain points.
defaultStyle Array.<module:ol/style/Style~Style>

Default style. The default default style is the same as Google Earth.
writeStyles boolean true

Write styles into KML.

Extends

Methods

readFeature(source, opt_options){module:ol/Feature~Feature} inherited

format/XMLFeature.js, line 44

Read a single feature.

Name Type Description
source Document | Node | Object | string

Source.
options

Read options.

Name Type Description
dataProjection module:ol/proj~ProjectionLike

Projection of the data we are reading. If not provided, the projection will be derived from the data (where possible) or the dataProjection of the format is assigned (where set). If the projection can not be derived from the data and if no dataProjection is set for a format, the features will not be reprojected.
extent module:ol/extent~Extent

Tile extent of the tile being read. This is only used and required for module:ol/format/MVT.
featureProjection module:ol/proj~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.<module:ol/Feature~Feature>} inherited

format/XMLFeature.js, line 88

Read all features from a feature collection.

Name Type Description
source Document | Node | Object | string

Source.
options

Options.

Name Type Description
dataProjection module:ol/proj~ProjectionLike

Projection of the data we are reading. If not provided, the projection will be derived from the data (where possible) or the dataProjection of the format is assigned (where set). If the projection can not be derived from the data and if no dataProjection is set for a format, the features will not be reprojected.
extent module:ol/extent~Extent

Tile extent of the tile being read. This is only used and required for module:ol/format/MVT.
featureProjection module:ol/proj~ProjectionLike

Projection of the feature geometries created by the format reader. If not provided, features will be returned in the dataProjection.
Returns:
Features.

readName(source){string|undefined}

format/KML.js, line 641

Read the name of the KML.

Name Type Description
source Document | Element | string

Source.
Returns:
Name.

readNetworkLinks(source){Array.<Object>}

format/KML.js, line 704

Read the network links of the KML.

Name Type Description
source Document | Element | string

Source.
Returns:
Network links.

readProjection(source){module:ol/proj/Projection~Projection} inherited

format/XMLFeature.js, line 174

Read the projection from the source.

Name Type Description
source Document | Node | Object | string

Source.
Returns:
Projection.

readRegion(source){Array.<Object>}

format/KML.js, line 766

Read the regions of the KML.

Name Type Description
source Document | Element | string

Source.
Returns:
Regions.

readRegionFromNode(node){Array.<Object>}

format/KML.js, line 800
Name Type Description
node Element

Node.
Returns:
Region.

writeFeatures(features, opt_options){string} inherited

format/XMLFeature.js, line 231

Encode an array of features as string.

Name Type Description
features Array.<module:ol/Feature~Feature>

Features.
options

Write options.

Name Type Description
dataProjection module:ol/proj~ProjectionLike

Projection of the data we are writing. If not provided, the dataProjection of the format is assigned (where set). If no dataProjection is set for a format, the features will be returned in the featureProjection.
featureProjection module:ol/proj~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

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

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:
Result.

writeFeaturesNode(features, opt_options){Node}

format/KML.js, line 832

Encode an array of features in the KML format as an XML node. GeometryCollections, MultiPoints, module:ol/geom/MultiLineString~MultiLineStrings, and MultiPolygons are output as MultiGeometries.

Name Type Description
features Array.<module:ol/Feature~Feature>

Features.
options

Options.

Name Type Description
dataProjection module:ol/proj~ProjectionLike

Projection of the data we are writing. If not provided, the dataProjection of the format is assigned (where set). If no dataProjection is set for a format, the features will be returned in the featureProjection.
featureProjection module:ol/proj~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

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

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:
Node.