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HeatmapLayer.md

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<MapboxGL.HeatmapLayer />

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

props

Prop Type Default Required Description
id string none true A string that uniquely identifies the source in the style to which it is added.
sourceID string MapboxGL.StyleSource.DefaultSourceID false The source from which to obtain the data to style.
If the source has not yet been added to the current style, the behavior is undefined.
Inferred from parent source only if the layer is a direct child to it.
sourceLayerID string none false Identifier of the layer within the source identified by the sourceID property
from which the receiver obtains the data to style.
aboveLayerID string none false Inserts a layer above aboveLayerID.
belowLayerID string none false Inserts a layer below belowLayerID
layerIndex number none false Inserts a layer at a specified index
filter array none false Filter only the features in the source layer that satisfy a condition that you define
minZoomLevel number none false The minimum zoom level at which the layer gets parsed and appears.
maxZoomLevel number none false The maximum zoom level at which the layer gets parsed and appears.
style union none false Customizable style attributes

styles


visibility

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.


heatmapRadius

Name: heatmapRadius

Description

Radius of influence of one heatmap point in pixels. Increasing the value makes the heatmap smoother, but less detailed. queryRenderedFeatures on heatmap layers will return points within this radius.

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}


heatmapWeight

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


heatmapIntensity

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}


heatmapColor

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


heatmapOpacity

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}