Classes
Type Definitions
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Options{Object}
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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
, azIndex
of 0 is assumed for layers that are added to the map'slayers
collection, orInfinity
when the layer'ssetMap()
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.
renderOrder
OrderFunction | undefined Render order. Function to be used when sorting features before rendering. By default features are drawn in the order that they are created. Use
null
to avoid the sort, but get an undefined draw order.renderBuffer
number
(defaults to 100)The buffer in pixels around the viewport extent used by the renderer when getting features from the vector source for the rendering or hit-detection. Recommended value: the size of the largest symbol, line width or label.
source
VectorSourceType | undefined Source.
map
Map | undefined Sets the layer as overlay on a map. The map will not manage this layer in its layers collection, and the layer will be rendered on top. This is useful for temporary layers. The standard way to add a layer to a map and have it managed by the map is to use
map.addLayer()
.declutter
boolean | string | number
(defaults to false)Declutter images and text on this layer. Any truthy value will enable decluttering. The priority is defined by the
zIndex
of the style and the render order of features. Higher z-index means higher priority. Within the same z-index, a feature rendered before another has higher priority. Items will not be decluttered against or together with items on other layers with the samedeclutter
value. If that is needed, useVectorLayer
instead.style
StyleLike | FlatStyleLike | null | undefined Layer style. When set to
null
, only features that have their own style will be rendered. SeeStyle
for the default style which will be used if this is not set.background
BackgroundColor | undefined Background color for the layer. If not specified, no background will be rendered.
imageRatio
number
(defaults to 1)Ratio by which the rendered extent should be larger than the viewport extent. A larger ratio avoids cut images during panning, but will cause a decrease in performance.
properties
Object.<string, *> | undefined Arbitrary observable properties. Can be accessed with
#get()
and#set()
.