ElevationProfile

The ElevationProfile widget is used to generate and display an elevation profile from an input line graphic. The input graphic can be set interactively by drawing a single or multi-segment line, or by selecting a line feature in the view. Alternatively the widget allows to set an input graphic programmatically on creation, or at runtime, by setting the input property.

ElevationProfile widget used in a city scene, displaying ground and building profiles. See Sample - ElevationProfile widget

The widget can visualize multiple profile lines, depending on the environment (2D versus 3D) and elevation source data:

ElevationProfileLineGround can be used in both MapView and SceneView. In this case, the elevation is sampled directly from Map.ground. Whether your map is displayed in 2D or 3D, the ground property needs to be set on the map.
ElevationProfileLineInput samples elevation data from the geometry of the input graphic. It is typically used with input line data with z values. If the input line data doesn't have z values, a profile line is also computed if the line is displayed with a non-draped elevation mode. An elevation offset can also be applied. Currently in 2D z values are not fetched from feature based layers, so in a MapView this profile line can only be used with client-side graphics with z values.
ElevationProfileLineQuery samples elevation data from the elevation source set in the source property. The elevation source can be an ElevationLayer or any object with a method called queryElevation, with the same signature as queryElevation.
ElevationProfileLineView is available only in a SceneView and it displays the elevation sampled directly from the view along the input graphic. All volumetric objects in a SceneView contribute to the resulting profile.

You can choose to display one or several profile lines in the chart, by setting them in the profiles property.

Once all profiles are refined to their maximum resolution, the corresponding 3D profile lines appear in the SceneView (currently no lines are displayed in a MapView), and profile statistics display in the legend for each profile line. Hovering on the chart shows an overlayed tooltip with elevation values of all profiles, and displays colored dot markers in the 3D view on the matching positions.

Checkboxes in the legend allow to hide individual profiles. Chart units can be set via the settings menu to metric, imperial or a specific unit. Click-and-drag on the chart zooms in to a specific part of the profile chart. When zoomed in, click on the minus button to reset zoom.

Drawing a path to get a ground profile.

Profile generated from a line feature with z-values shows a paraglide track above ground.

Known Limitations

In 3D ElevationProfileLineInput is not taking into consideration the featureExpression set on the elevation mode of the layer.
In 2D z values are not fetched from feature based layers. Therefore, ElevationProfileLineInput can only be used with client-side graphics with z values in a MapView.

See also

Examples

const elevationProfile = new ElevationProfile({
  view: view
});
// adds the ElevationProfile to the top right corner of the view
view.ui.add(elevationProfile, "top-right");

// elevation profile with all the line profiles
const elevationProfile = new ElevationProfile({
  view: view,
  profiles: [{
    // displays elevation values from Map.ground
    type: "ground", //autocasts as new ElevationProfileLineGround()
    color: "#61d4a4",
    title: "Ground elevation"
  }, {
    // displays elevation values from the input line graphic
    type: "input", //autocasts as new ElevationProfileLineInput()
    color: "#f57e42",
    title: "Line elevation"
  }, {
    // displays elevation values from a SceneView
    type: "view", //autocasts as new ElevationProfileLineView()
    color: "#8f61d4",
    title: "View elevation"
    // by default ground and all layers are used to compute elevation, but
    // you can define which elements should be included/excluded from the computation
    exclude: [map.ground]
  }, {
    // displays elevation values from a custom source
    type: "query",
    source: new ElevationLayer({
      url: "https://elevation3d.arcgis.com/arcgis/rest/../Terrain3D/ImageServer"
    }),
    color: "#d46189",
    title: "Custom elevation"
  }]
});
view.ui.add(elevationProfile, "bottom-right");

Constructors

new ElevationProfile(properties)

Parameter

properties Object

optional

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

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.

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Type	Summary	Class
String\|HTMLElement	The ID or node representing the DOM element containing the widget. more details	Widget
String	The name of the class. more details	Accessor
Number	When the spatial reference is projected (other than web mercator) and the path is shorter than this threshold, distances will be computed planimetrically. more details	ElevationProfile
String	The widget's default CSS icon class. more details	ElevationProfile
String	The unique ID assigned to the widget when the widget is created. more details	Widget
Graphic	The input line graphic along which elevation will be queried in order to generate an elevation profile. more details	ElevationProfile
String	The widget's default label. more details	ElevationProfile
Collection<(ElevationProfileLineGround\|ElevationProfileLineInput\|ElevationProfileLineQuery\|ElevationProfileLineView)>	Collection of elevation profile lines which are to be generated and displayed in the widget's chart. more details	ElevationProfile
SystemOrLengthUnit	Unit system (imperial, metric) or specific unit used for displaying the elevation and distance values. more details	ElevationProfile
SystemOrLengthUnit []	List of available units and unit systems (imperial, metric) for displaying the elevation and distance values. more details	ElevationProfile
SceneView\|MapView	A reference to the SceneView or the MapView. more details	ElevationProfile
ElevationProfileViewModel	The view model for this widget. more details	ElevationProfile
Boolean	Indicates whether the widget is visible. more details	Widget
VisibleElements	This property provides the ability to display or hide the individual elements of the widget. more details	ElevationProfile

Property Details

container String|HTMLElement inherited

The ID or node representing the DOM element containing the widget. This property can only be set once. The following examples are all valid use cases when working with widgets.

Examples

// Create the HTML div element programmatically at runtime and set to the widget's container
const basemapGallery = new BasemapGallery({
  view: view,
  container: document.createElement("div")
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

// Specify an already-defined HTML div element in the widget's container

const basemapGallery = new BasemapGallery({
  view: view,
  container: basemapGalleryDiv
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

// HTML markup
<body>
  <div id="viewDiv"></div>
  <div id="basemapGalleryDiv"></div>
</body>

// Specify the widget while adding to the view's UI
const basemapGallery = new BasemapGallery({
  view: view
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

declaredClass Stringreadonly inherited

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

geodesicDistanceThreshold Number

When the spatial reference is projected (other than web mercator) and the path is shorter than this threshold, distances will be computed planimetrically. Otherwise distances will be computed geodetically.

Default Value:100000

iconClass String

The widget's default CSS icon class.

id String inherited

The unique ID assigned to the widget when the widget is created. If not set by the developer, it will default to the container ID, or if that is not present then it will be automatically generated.

input Graphicautocast

The input line graphic along which elevation will be queried in order to generate an elevation profile.

Typically not set when creating the widget. In this case the widget starts empty, and waits for the user to either draw a new profile or generate a profile from selecting a line feature. The result of this action populates input. input can be set when constructing the widget, or set or changed at runtime. The input graphic must contain a geometry of type Polyline, symbol and attributes of the input graphic are ignored.

Default Value:null

label String

The widget's default label.

profiles Collection<(ElevationProfileLineGround|ElevationProfileLineInput|ElevationProfileLineQuery|ElevationProfileLineView)>autocast

Collection of elevation profile lines which are to be generated and displayed in the widget's chart. See the different profile line types for details on usage and behavior.

Once an elevation profile is generated, each line will contain the raw data used to generate the chart and profile statistics. The order of the profiles within the collection determines the drawing order on the chart.

In a MapView ElevationProfileLineView is not supported.

Example

const elevationProfile = new ElevationProfile({
  view: view,
  profiles: [{
    // displays elevation values from Map.ground
    type: "ground", //autocasts as new ElevationProfileLineGround()
  }, {
    // displays elevation values from the input line graphic
    type: "input", //autocasts as new ElevationProfileLineInput()
  }, {
    // displays elevation values from an elevation source
    type: "query", //autocasts as new ElevationProfileLineQuery()
    source: elevationLayer
  }, {
    // displays elevation values from a SceneView
    type: "view" //autocasts as new ElevationProfileLineView()
  }]
});

unit SystemOrLengthUnit

Unit system (imperial, metric) or specific unit used for displaying the elevation and distance values.

unitOptions SystemOrLengthUnit []

List of available units and unit systems (imperial, metric) for displaying the elevation and distance values.

view SceneView|MapView

A reference to the SceneView or the MapView.

viewModel ElevationProfileViewModelautocast

The view model for this widget. This is a class that contains all the logic (properties and methods) that controls this widget's behavior. See the ElevationProfileViewModel class to access all properties and methods on the widget.

visible Boolean inherited

Indicates whether the widget is visible.

If false, the widget will no longer be rendered in the web document. This may affect the layout of other elements or widgets in the document. For example, if this widget is the first of three widgets associated to the upper right hand corner of the view UI, then the other widgets will reposition when this widget is made invisible. For more information, refer to the CSS display value of "none".

Default Value:true

Example

// Hides the widget in the view
widget.visible = false;

visibleElements VisibleElements

This property provides the ability to display or hide the individual elements of the widget.

Example

elevationProfile.visibleElements = {
   legend: true,
   chart: true,
   clearButton: true,
   settingsButton: true,
   sketchButton: true,
   selectButton: true,
   uniformChartScalingToggle: true
}

Method Overview

Show inherited methods

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Return Type	Summary	Class
	Adds one or more handles which are to be tied to the lifecycle of the object. more details	Accessor
String	A utility method used for building the value for a widget's `class` property. more details	Widget
	Destroys the widget instance. more details	Widget
Boolean	Emits an event on the instance. more details	Widget
Boolean	Indicates whether there is an event listener on the instance that matches the provided event name. more details	Widget
Boolean	Returns true if a named group of handles exist. more details	Accessor
Boolean	`isFulfilled()` may be used to verify if creating an instance of the class is fulfilled (either resolved or rejected). more details	Widget
Boolean	`isRejected()` may be used to verify if creating an instance of the class is rejected. more details	Widget
Boolean	`isResolved()` may be used to verify if creating an instance of the class is resolved. more details	Widget
Object	Registers an event handler on the instance. more details	Widget
	Adds one or more handles which are to be tied to the lifecycle of the widget. more details	Widget
	This method is primarily used by developers when implementing custom widgets. more details	Widget
	Removes a group of handles owned by the object. more details	Accessor
Object	This method is primarily used by developers when implementing custom widgets. more details	Widget
	Renders widget to the DOM immediately. more details	Widget
	This method is primarily used by developers when implementing custom widgets. more details	Widget
Promise	`when()` may be leveraged once an instance of the class is created. more details	Widget

Method Details

addHandles(handleOrHandles, groupKey)inherited Since: ArcGIS Maps SDK for JavaScript 4.25

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

Parameters

handleOrHandles WatchHandle|WatchHandle []

Handles marked for removal once the object is destroyed.

groupKey *

optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

classes(classNames){String}inherited

A utility method used for building the value for a widget's class property. This aids in simplifying CSS class setup.

Parameter

classNames String|String []|Object

repeatable

The class names.

Returns

Type	Description
String	The computed class name.

See also

Guide - Widget development (rendering)

Example

// .tsx syntax showing how to set CSS classes while rendering the widget

render() {
  const dynamicIconClasses = {
    [CSS.myIcon]: this.showIcon,
    [CSS.greyIcon]: !this.showIcon
  };

  return (
    <div class={classes(CSS.root, CSS.mixin, dynamicIconClasses)} />
  );
}

destroy()inherited

Destroys the widget instance.

emit(type, event){Boolean}inherited

Emits an event on the instance. This method should only be used when creating subclasses of this class.

Parameters

type String

The name of the event.

event Object

optional

The event payload.

Returns

Type	Description
Boolean	`true` if a listener was notified

hasEventListener(type){Boolean}inherited

Indicates whether there is an event listener on the instance that matches the provided event name.

Parameter

type String

The name of the event.

Returns

Type	Description
Boolean	Returns true if the class supports the input event.

hasHandles(groupKey){Boolean}inherited Since: ArcGIS Maps SDK for JavaScript 4.25

Returns true if a named group of handles exist.

Parameter

groupKey *

optional

A group key.

Returns

Type	Description
Boolean	Returns `true` if a named group of handles exist.

Example

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

isFulfilled(){Boolean}inherited Since: ArcGIS Maps SDK for JavaScript 4.19

isFulfilled() may be used to verify if creating an instance of the class is fulfilled (either resolved or rejected). If it is fulfilled, true will be returned.

Returns

Type	Description
Boolean	Indicates whether creating an instance of the class has been fulfilled (either resolved or rejected).

isRejected(){Boolean}inherited Since: ArcGIS Maps SDK for JavaScript 4.19

isRejected() may be used to verify if creating an instance of the class is rejected. If it is rejected, true will be returned.

Returns

Type	Description
Boolean	Indicates whether creating an instance of the class has been rejected.

isResolved(){Boolean}inherited Since: ArcGIS Maps SDK for JavaScript 4.19

isResolved() may be used to verify if creating an instance of the class is resolved. If it is resolved, true will be returned.

Returns

Type	Description
Boolean	Indicates whether creating an instance of the class has been resolved.

on(type, listener){Object}inherited

Registers an event handler on the instance. Call this method to hook an event with a listener.

Parameters

type String|String []

An event or an array of events to listen for.

listener Function

The function to call when the event fires.

Returns

Type Description

Object

Returns an event handler with a remove() method that should be called to stop listening for the event(s).

Property	Type	Description
remove	Function	When called, removes the listener from the event.

Example

view.on("click", function(event){
  // event is the event handle returned after the event fires.
  console.log(event.mapPoint);
});

own(handleOrHandles)inherited Since: ArcGIS Maps SDK for JavaScript 4.24

Adds one or more handles which are to be tied to the lifecycle of the widget. The handles will be removed when the widget is destroyed.

const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true}
);

this.own(handle); // Handle gets removed when the widget is destroyed.

Parameter

handleOrHandles WatchHandle|WatchHandle []

Handles marked for removal once the widget is destroyed.

postInitialize()inherited

This method is primarily used by developers when implementing custom widgets. Executes after widget is ready for rendering.

removeHandles(groupKey)inherited Since: ArcGIS Maps SDK for JavaScript 4.25

Removes a group of handles owned by the object.

Parameter

groupKey *

optional

A group key or an array or collection of group keys to remove.

Example

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

render(){Object}inherited

This method is primarily used by developers when implementing custom widgets. It must be implemented by subclasses for rendering.

Returns

Type	Description
Object	The rendered virtual node.

renderNow()inherited

Renders widget to the DOM immediately.

scheduleRender()inherited

This method is primarily used by developers when implementing custom widgets. Schedules widget rendering. This method is useful for changes affecting the UI.

when(callback, errback){Promise}inherited Since: ArcGIS Maps SDK for JavaScript 4.19

when() may be leveraged once an instance of the class is created. This method takes two input parameters: a callback function and an errback function. The callback executes when the instance of the class loads. The errback executes if the instance of the class fails to load.

Parameters

callback Function

optional

The function to call when the promise resolves.

errback Function

optional

The function to execute when the promise fails.

Returns

Type	Description
Promise	Returns a new promise for the result of `callback`.

Example

// Although this example uses the BasemapGallery widget, any class instance that is a promise may use when() in the same way
let bmGallery = new BasemapGallery();
bmGallery.when(function(){
  // This function will execute once the promise is resolved
}, function(error){
  // This function will execute if the promise is rejected due to an error
});

Type Definitions

VisibleElements

The visible elements that are displayed within the widget. This provides the ability to turn individual elements of the widget's display on/off. The visual elements in this widget are the legend, chart, settingsButton, sketchButton, and selectButton. These are all set to true by default.

Properties

legend Boolean

optional

Default Value:true

When set to false, the legend (which includes statistics) is not displayed.

chart Boolean

optional

Default Value:true

When set to false, the chart is not displayed.

clearButton Boolean

optional

Default Value:true

When set to false the button used to clear the current elevation profile is not displayed.

settingsButton Boolean

optional

Default Value:true

When set to false, the button used to open the settings popup is not displayed.

sketchButton Boolean

optional

Default Value:true

When set to false, the button used to start drawing/sketchinng is not displayed.

selectButton Boolean

optional

Default Value:true

When set to false, the button used to select a path is not displayed.

unitSelector Boolean

optional

Default Value:true

When set to false, the dropdown used to select the units is not displayed.

uniformChartScalingToggle Boolean

optional

Default Value:true

When set to false, the element used to toggle uniform chart scaling on or off is not displayed.

ArcGIS Maps SDK for JavaScriptAPI Reference

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