typo
typo

visibile => visible
openlayers/openlayers,openlayers/openlayers,oterral/ol3,bjornharrtell/ol3,stweil/openlayers,bjornharrtell/ol3,stweil/openlayers,stweil/openlayers,oterral/ol3,bjornharrtell/ol3,ahocevar/openlayers,ahocevar/openlayers,oterral/ol3,openlayers/openlayers,ahocevar/openlayers