Module: ol/layer/Layer

ol/layer/Layer


Classes

Layer

Type Definitions

LayerEventType{'sourceready'} {'change:source'}

Options{Object}

Properties:
Name Type Description
className string
(defaults to 'ol-layer')

A CSS class name to set to the layer element.

opacity number
(defaults to 1)

Opacity (0, 1).

visible boolean
(defaults to true)

Visibility.

extent Extent | undefined

The bounding extent for layer rendering. The layer will not be rendered outside of this extent.

zIndex number | undefined

The z-index for layer rendering. At rendering time, the layers will be ordered, first by Z-index and then by position. When undefined, a zIndex of 0 is assumed for layers that are added to the map's layers collection, or Infinity when the layer's setMap() method was used.

minResolution number | undefined

The minimum resolution (inclusive) at which this layer will be visible.

maxResolution number | undefined

The maximum resolution (exclusive) below which this layer will be visible.

minZoom number | undefined

The minimum view zoom level (exclusive) above which this layer will be visible.

maxZoom number | undefined

The maximum view zoom level (inclusive) at which this layer will be visible.

source SourceType | undefined

Source for this layer. If not provided to the constructor, the source can be set by calling layer.setSource(source) after construction.

map Map | null | undefined

Map.

render RenderFunction | undefined

Render function. Takes the frame state as input and is expected to return an HTML element. Will overwrite the default rendering for the layer.

properties Object.<string, *> | undefined

Arbitrary observable properties. Can be accessed with #get() and #set().

RenderFunction()

State{Object}

Properties:
Name Type Description
layer Layer

Layer.

opacity number

Opacity, the value is rounded to two digits to appear after the decimal point.

visible boolean

Visible.

managed boolean

Managed.

extent Extent | undefined

Extent.

zIndex number | undefined

ZIndex.

maxResolution number

Maximum resolution.

minResolution number

Minimum resolution.

minZoom number

Minimum zoom.

maxZoom number

Maximum zoom.