Creates an attribution control with the given layers. Base layers will be switched with radio buttons, while overlays will be switched with checkboxes.
Adds a base layer (radio button entry) with the given name to the control.
Adds an overlay (checkbox entry) with the given name to the control.
Remove the given layer from the control.
Creates an attribution control with the given layers. Base layers will be switched with radio buttons, while overlays will be switched with checkboxes.