Raster Overlays

Cesium Native's raster overlays are georeferenced 2D images - perhaps consisting of trillions of pixels or more! - that are draped over the top of a Tileset. A classic example of a raster overlay is a satellite imagery layer. A Tileset can have multiple raster overlays, and they're usually alpha-blended together in a layered fashion. They can also be used for more sophisticated effects, however. For example, a raster overlay could represent a "mask" of where on Earth is land versus water, and that mask used in a custom shader or material to render waves in the water-covered areas.

The following raster overlay types are currently included in Cesium Native:

• BingMapsRasterOverlay
• DebugColorizeTilesRasterOverlay
• IonRasterOverlay
• TileMapServiceRasterOverlay
• UrlTemplateRasterOverlay
• WebMapServiceRasterOverlay
• WebMapTileServiceRasterOverlay

To add a raster overlay to a Tileset, construct an instance of the appropriate class and add it to the RasterOverlayCollection returned by Tileset::getOverlays. See the reference documentation for each overlay for details about how to configure that overlay type.

For more information about RasterOverlays, see the following topics:

• Implementing a new RasterOverlay Type - How to implement a new kind of RasterOverlay.
• How Raster Overlays Work - How Cesium Native's Raster Overlay system works under-the-hood.