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HeatmapLayer.md

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<MapLibreGL.HeatmapLayer />

HeatmapLayer is a style layer that renders one or more filled circles on the map.

props

Prop Type Default Required Description
style HeatmapLayerStyleProps none false Customizable style attributes
sourceID FIX ME UNKNOWN TYPE MapLibreGL.StyleSource.DefaultSourceID false FIX ME NO DESCRIPTION

styles


Name

visibility

Description

Whether this layer is displayed.

Type

enum

Default Value

visible

Supported Values

visible - The layer is shown.
none - The layer is not shown.


Name

heatmapRadius

Description

Radius of influence of one heatmap point in pixels. Increasing the value makes the heatmap smoother, but less detailed.

Type

number

Default Value

30

Units

pixels

Minimum

1

Expression

Parameters: zoom, feature, feature-state


Name

heatmapRadiusTransition

Description

The transition affecting any changes to this layer’s heatmapRadius propery.

Type

{ duration, delay }

Units

milliseconds

Default Value

{duration: 300, delay: 0}


Name

heatmapWeight

Description

A measure of how much an individual point contributes to the heatmap. A value of 10 would be equivalent to having 10 points of weight 1 in the same spot. Especially useful when combined with clustering.

Type

number

Default Value

1

Minimum

0

Expression

Parameters: zoom, feature, feature-state


Name

heatmapIntensity

Description

Similar to heatmapWeight but controls the intensity of the heatmap globally. Primarily used for adjusting the heatmap based on zoom level.

Type

number

Default Value

1

Minimum

0

Expression

Parameters: zoom


Name

heatmapIntensityTransition

Description

The transition affecting any changes to this layer’s heatmapIntensity propery.

Type

{ duration, delay }

Units

milliseconds

Default Value

{duration: 300, delay: 0}


Name

heatmapColor

Description

Defines the color of each pixel based on its density value in a heatmap. Should be an expression that uses ["heatmapDensity"] as input.

Type

color

Default Value

interpolate,linear,heatmap-density,0,rgba(0, 0, 255, 0),0.1,royalblue,0.3,cyan,0.5,lime,0.7,yellow,1,red

Expression

Parameters: heatmap-density


Name

heatmapOpacity

Description

The global opacity at which the heatmap layer will be drawn.

Type

number

Default Value

1

Minimum

0

Maximum

1

Expression

Parameters: zoom


Name

heatmapOpacityTransition

Description

The transition affecting any changes to this layer’s heatmapOpacity propery.

Type

{ duration, delay }

Units

milliseconds

Default Value

{duration: 300, delay: 0}