IconSymbol3DLayer is used to render Point geometries using a flat 2D icon (e.g. a circle) with a PointSymbol3D in a SceneView. MapView does not support 3D symbols. Polygon features may also be rendered with IconSymbol3DLayers, but the icon symbol layer must be contained within a PolygonSymbol3D, not a PointSymbol3D in that scenario.

The shape of the icon is set in the resource property and the color is set in the material property. Size may be defined in points or pixels with the size property. Icon color and size can also be data-driven by adding size and/or color visual variables to any Renderer that uses this symbol layer.

IconSymbol3DLayers must be added to the symbolLayers property of either the PointSymbol3D or PolygonSymbol3D symbols. Multiple symbol layers may be used in a single symbol.

Because icon symbol layers are defined in screen space (pixels/points), they can either be draped on the terrain, or billboarded in the view. Billboarded icons allow the symbol to face the user at all times as long as it is visible in to the camera. This is particularly apparent with tilted views. Draped icons drape the symbols on the surface of the terrain.

Draped icons	Billboarded icons

The ability to drape and billboard icons is controlled in the elevationInfo property of the FeatureLayer. Setting the mode to on-the-ground drapes the icons, whereas setting it to relative-to-ground billboards them.

See Symbol3DLayer and Symbol3D to read more general information about 3D symbols, symbol layers and how they relate to one another.

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

• Sample - Visualize features thematically with multiple variables (2D)

• Sample - Flat vs. volumetric 3D symbol layers

• Symbol3DLayer
• Symbol3D
• Renderer

• ArcGIS blog - Working with icons, lines, and fill symbols

Example:

var symbol = {
  type: "point-3d",  // autocasts as new PointSymbol3D()
  symbolLayers: [{
    type: "icon",  // autocasts as new IconSymbol3DLayer()
    size: 8,  // points
    resource: { primitive: "circle" },
    material: { color: "red" }
  }]
};

Constructors

new IconSymbol3DLayer(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

anchor String

The positioning of the icon relative to the geometry.

Possible Values:"center"|"left"|"right"|"top"|"bottom"|"top-left"|"top-right"|"bottom-left"|"bottom-right"|"relative"

Default Value:center

anchorPosition Object

Since: ArcGIS API for JavaScript 4.11

Defines the anchor relative to the center of the icon. It is specified as a ratio of the icon's dimensions. For example, a value of { x: 0, y: 0 } designates the center of the icon, while a value of { x: -0.5, y: -0.5 } causes the top-left corner of the icon to coincide with the feature geometry.

This property only applies when anchor is set to relative.

Properties:

x Number Value defining the position relative to the icon's width.

y Number Value defining the position relative to the icon's height.

Examples:

symbolLayer.anchor = "relative";
symbolLayer.anchorPosition = { x: 0, y: 0.5 }; // equivalent to `anchor: "bottom"`

symbolLayer.anchor = "relative";
symbolLayer.anchorPosition = { x: 1.5, y: 1 }; // the anchor can be placed outside of the icon

declaredClass Stringreadonly inherited

Since: ArcGIS API for JavaScript 4.7

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

material Objectautocast

The material used to shade the icon. This property defines the icon's color.

Property:

color Color optional Default Value:white Autocasts from Object|Number[]|String The fill color of the icon. If the icon uses an image as resource, each pixel of the image will be multiplied by this color. This can be autocast with an array of rgb(a) values, named string, hex string or an hsl(a) string, an object with r, g, b, and a properties, or a Color object.

Examples:

// CSS color string
symbolLayer.material = {
  color: "dodgerblue"
};

// HEX string
symbolLayer.material = {
  color: "#33cc33";
}

// array of RGBA values
symbolLayer.material = {
  color: [51, 204, 51, 0.3];
}

// object with rgba properties
symbolLayer.material = {
  color: {
    r: 51,
    g: 51,
    b: 204,
    a: 0.7
  }
};

outline Objectautocast

The outline of the icon. The color property of this object directly modifies the overall color of IconSymbol3DLayer defined with the cross or x primitive.

Properties:

color Color optional Default Value:black Autocasts from Object|Number[]|String The color of the outline. This can be autocast with an array of rgb(a) values, named string, hex string or an hsl(a) string, an object with r, g, b, and a properties, or a Color object.

size Number optional Default Value:1.125 Autocasts from Number|String The width of the outline in points. This value may be autocast with a string expressing size in points or pixels (e.g. 12px).

Example:

symbolLayer.outline = {
  color: "blue",
  size: "0.5px"
};

resource Object

The shape (primitive) or image URL (href) used to visualize the features. If both properties are present, href takes precedence and primitive is ignored.

Known Limitations

Using this property to render an SVG path is not supported in IE11.

Properties:

primitive String optional Uses a built-in shape. See the table below for list of possible values. Value Description circle square cross x kite triangle

href String optional The URL or data URI for the image. If the external resource is an SVG then the SVG root node must have a set width and height, otherwise it will not render at the correct size. SVG is not supported in IE11.

Default Value:{ primitive: "circle" }

Example:

symbolLayer.resource = {
  primitive: "cross"
};

size Numberautocast

Autocasts from Number|String

The size of the icon in points. This value may be autocast with a string expressing size in points or pixels (e.g. 12px).

Default Value:12

Examples:

// size in points
symbolLayer.size = 14;

// size in pixels
symbolLayer.size = "20px"; // autocasts to number

// size in points
symbolLayer.size = "14pt"; // autocasts to number

type Stringreadonly

The symbol type.

For IconSymbol3DLayer the type is always "icon".

Method Overview

Method Details

clone(){IconSymbol3DLayer}

Creates a deep clone of the symbol layer.

Returns:

Type	Description
IconSymbol3DLayer	A deep clone of the object that invoked this method.

Example:

// Creates a deep clone of the graphic's first symbol layer
var symLyr = graphic.symbol.symbolLayers.getItemAt(0).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.