add the possibility to link one or more detached base layer to a normal base layer so more than one base layer can be show or hidden at once (this also works with the layer linked to the opacity slider)
add the possibility to link one or more detached base layer to a normal base layer so more than one base layer can be show or hidden at once (this also works with the layer linked to the opacity slider)

tsauerwein/c2cgeoportal,tsauerwein/c2cgeoportal,tsauerwein/c2cgeoportal,tsauerwein/c2cgeoportal