A layer is an information that can be superimposed on another information.
It exists different natures of layer,
which are listed as below :
In addition to the classes, a factory is available to help for creating layer. Once the layer is created, the client can handle it by the use of its interface.

- AtmosphereLayer : A layer to create an atmosphere on a planet.
- BingLayer: The Microsoft service proving a WMTS server.
- CoordinateGridLayer : A layer to create a grid on the sky
- GeoJSONLayer : A layer to add a GeoJSON on the globe
- GroundOverlayLayer : A layer to draw an image overlay draped onto the terrain
- HipsCatLayer : A layer to draw a HIPS catalogue
- HipsFitsLayer : A layer to draw an Hips Fits
- HipsGraphicLayer : A layer to draw a Hips JPEG/PNG
- MocLayer : A layer to draw a multi-order-coverage index
- OpenSearchLayer : A layer to draw the result from an open search service
- OSMLayer : A layer to display data coming from OpenStreetMap server
- PlanetLayer : A layer to save all layers of a planet
- TileWireframeLayer : A layer to draw a grid on the planet
- VectorLayer : A layer to draw a vector
- WCSElevationLayer : A layer to draw the elevation
- WMSElevationLayer : A layer to draw the elevation
- WMSLayer : A layer to draw images coming from the WMS server
- WMTSLayer : A layer to draw predefined tiles coming from a WMTS server
In addition to the classes, a factory is available to help for creating layer. Once the layer is created, the client can handle it by the use of its interface.
- Implements: