Composite Layers¶
Combines two or more layers into a single layer. This can improve render and caching performance, and also allows you to group layers together for operations like opacity and visibility.
CompositeImage, CompositeElevation¶
CLASS: CompositeImageLayer (inherits from ImageLayer))
CLASS: CompositeElevationLayer (inherits from ElevationLayer)
Property | Description | Type | Default |
---|---|---|---|
layers | Collection of layers to composite. | [layers] |
Example¶
Composites three image layers into a single layer:
<CompositeImage name="Combined imagery">
<layers>
<TMSImage name="ReadyMap 15m Imagery">
<url>http://readymap.org/readymap/tiles/1.0.0/7/</url>
</TMSImage>
<GDALImage name="Boston inset">
<url>../data/boston-inset-wgs84.tif</url>
</GDALImage>
<GDALImage name="New York inset">
<url>../data/nyc-inset-wgs84.tif</url>
</GDALImage>
</layers>
</CompositeImage>
Note: you can only composite layers of the same base type (e.g. image layers with other image layers.)