# Global

### Members

#### clockTrackedDataSource : DataSource
Widgets/Viewer/Viewer.js 1067

  Gets or sets the data source to track with the viewer's clock.

#### enablePickFeatures : Boolean
Scene/WebMapServiceImageryProvider.js 392

  Gets or sets a value indicating whether feature picking is enabled. If true, `WebMapServiceImageryProvider#pickFeatures` will invoke the `GetFeatureInfo` service on the WMS server and attempt to interpret the features included in the response. If false, `WebMapServiceImageryProvider#pickFeatures` will immediately return undefined (indicating no pickable features) without communicating with the server. Set this property to false if you know your data source does not support picking features or if you don't want this provider's features to be pickable.
  Default Value: `true`

#### layers : String
Scene/ArcGisMapServerImageryProvider.js 552

  Gets the comma-separated list of layer IDs to show.

#### readonlypickFeaturesUrl : String
Scene/UrlTemplateImageryProvider.js 267

  Gets the URL template to use to use to pick features. If this property is not specified, {@see UrlTemplateImageryProvider#pickFeatures} will immediately returned undefined, indicating no features picked. The URL template supports all of the keywords supported by the {@see UrlTemplateImageryProvider#url} property, plus the following:
  - `{i}`: The pixel column (horizontal coordinate) of the picked position, where the Westernmost pixel is 0.
  - `{j}`: The pixel row (vertical coordinate) of the picked position, where the Northernmost pixel is 0.
  - `{reverseI}`: The pixel column (horizontal coordinate) of the picked position, where the Easternmost pixel is 0.
  - `{reverseJ}`: The pixel row (vertical coordinate) of the picked position, where the Southernmost pixel is 0.
  - `{longitudeDegrees}`: The longitude of the picked position in degrees.
  - `{latitudeDegrees}`: The latitude of the picked position in degrees.
  - `{longitudeProjected}`: The longitude of the picked position in the projected coordinates of the tiling scheme.
  - `{latitudeProjected}`: The latitude of the picked position in the projected coordinates of the tiling scheme.
  - `{format}`: The format in which to get feature information, as specified in the {@see GetFeatureInfoFormat}.

#### readonlypickPositionSupported : Boolean
Scene/Scene.js 653

  Returns true if the pickPosition function is supported.