LabelSymbol3D is used to render labels for features from a FeatureLayer in a 3D SceneView. This symbol type is not supported in 2D MapViews.

A LabelSymbol3D must include at least one symbol layer for it to render in the view. One or more of the following symbol layer types my be used to define a 3D label symbol:

Symbol3DLayer Type	Flat/Volumetric	Size Units	Example
TextSymbol3DLayer	flat	points

The image below depicts a FeatureLayer with labels defined by LabelSymbol3D.

Autocasting support

As of version 4.5 of the ArcGIS API for JavaScript, autocasting is universally supported for all renderers, symbols, and symbol layers in the API. So there is no need to include this module in the require() and define() module loaders of your application unless you intend to use the static method(s) of this module.

See also:

• Symbol Playground

• FeatureLayer
• LabelClass

• Sample: Flat vs. volumetric 3D symbol layers

Example:

var labelClass = new LabelClass({
  labelExpressionInfo: {
    expression: "$feature.COUNTY"  // Text for labels comes from COUNTY field
  },
  symbol: {
    type: "label-3d",  // autocasts as new LabelSymbol3D()
    symbolLayers: [{
      type: "text",  // autocasts as new TextSymbol3DLayer()
      material: { color: [ 49,163,84 ] },
      size: 12  // Defined in points
    }]
  }
});
// Add labels to the feature layer
featureLayer.labelsVisible = true;
featureLayer.labelingInfo = [ labelClass ];

Constructors

new LabelSymbol3D(properties)

Parameter:

properties Object optional See the properties for a list of all the properties that may be passed into the constructor.

Property Overview

Property Details

calloutCallout3D

Since: ArcGIS API for JavaScript 4.4

Settings for adding a callout visualization to the symbol. Callouts are drawn from the point feature location that is being symbolized, to the vertical offset of the symbol. This property has no effect if verticalOffset is not set. At the moment only callouts of type line are supported. See LineCallout3D.

See also:

• Sample: Using callout lines with labels

Example:

var symbol = {
  type: "label-3d",  // autocasts as new LabelSymbol3D()
  symbolLayers: [...],
  verticalOffset: ...,
  callout: {
    type: "line",  // autocasts as new LineCallout3D()
    size: 1.5,
    color: [150, 150, 150],
    border: {
      color: [50, 50, 50]
    }
  }
};

declaredClassStringreadonly inherited

Since: ArcGIS API for JavaScript 4.7

The name of the class. The declared class name is formatted as esri.folder.className.

symbolLayersCollection<Symbol3DLayer>autocast inherited

Autocasts from Object[]

A Collection of Symbol3DLayer objects used to visualize the graphic or feature. Individual symbol layers may be autocast as objects and specified using the type property.

typeStringreadonly

For LabelSymbol3D the type is always label-3d.

verticalOffsetAccessor

Since: ArcGIS API for JavaScript 4.4

Shifts the symbol along the vertical world axis by a given height. The height is set in screen space units like points or pixels. For points displayed with a callout verticalOffset should be set.

Properties:

screenLength Number The vertical symbol offset in points. This value may be autocast with a string expressing size in points or pixels (e.g. 12px).

minWorldLength Number optional The minimum vertical symbol offset in world units. It acts as a lower bound to avoid the vertical offset becoming too small. In the following animation the green symbol on the left has minWorldLength = 20 and for the orange symbol on the right minWorldLength has not been set:

maxWorldLength Number optional The maximum vertical symbol offset in world units. It acts as an upper bound to avoid vertical offset becoming too big. In the following animation the green symbols have maxWorldLength = 50 and orange symbols don't have maxWorldLength set:

See also:

• Sample: Using callout lines with labels

Example:

var symbol = {
  type: "label-3d",  // autocasts as new LabelSymbol3D()
  symbolLayers: [...],
  verticalOffset: {
    screenLength: 40,
    maxWorldLength: 100,
    minWorldLength: 20
  },
  callout: ...
};

Method Overview

Method Details

clone(){LabelSymbol3D}

Creates a deep clone of the symbol.

Returns:

Type	Description
LabelSymbol3D	A deep clone of the object that invoked this method.

Example:

// Creates a deep clone of the graphic's symbol
var symLyr = graphic.symbol.clone();

fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from a product in the ArcGIS platform. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameter:

json Object A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns:

Type	Description
*	Returns a new instance of this class.

toJSON(){Object}inherited

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() topic in the Guide for more information.

Returns:

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.