Module: ol/layer/Heatmap

Classes

Heatmap

Type Definitions

Options{Object}

Properties:

Name	Type	Description
className	string (defaults to 'ol-layer')	A CSS class name to set to the layer element.
opacity	number (defaults to 1)	Opacity (0, 1).
visible	boolean (defaults to true)	Visibility.
extent	Extent | undefined	The bounding extent for layer rendering. The layer will not be rendered outside of this extent.
zIndex	number | undefined	The z-index for layer rendering. At rendering time, the layers will be ordered, first by Z-index and then by position. When undefined, a zIndex of 0 is assumed for layers that are added to the map's layers collection, or Infinity when the layer's setMap() method was used.
minResolution	number | undefined	The minimum resolution (inclusive) at which this layer will be visible.
maxResolution	number | undefined	The maximum resolution (exclusive) below which this layer will be visible.
minZoom	number | undefined	The minimum view zoom level (exclusive) above which this layer will be visible.
maxZoom	number | undefined	The maximum view zoom level (inclusive) at which this layer will be visible.
gradient	Array.<string> (defaults to ['#00f', '#0ff', '#0f0', '#ff0', '#f00'])	The color gradient of the heatmap, specified as an array of CSS color strings.
radius	NumberExpression (defaults to 8)	Radius size in pixels. Note that for LineStrings, the width of the line will be double the radius.
blur	NumberExpression (defaults to 15)	Blur size in pixels. This is added to the radius parameter above to create the final size of the blur effect.
weight	WeightExpression (defaults to 'weight')	The feature attribute to use for the weight. This also supports expressions returning a number or a function that returns a weight from a feature. Weight values should range from 0 to 1 (and values outside will be clamped to that range).
filter	BooleanExpression | undefined	Optional filter expression.
variables	Object.<string, (number|Array.<number>|string|boolean)> | undefined	Variables used in expressions (optional)
source	VectorSourceType | undefined	Point source.
properties	Object.<string, *> | undefined	Arbitrary observable properties. Can be accessed with #get() and #set().

WeightExpression()

layer/Heatmap.js, line 18