Only create background layers once
Only create background layers once

Jenselme/ngeo,camptocamp/ngeo,camptocamp/ngeo,pgiraud/ngeo,camptocamp/ngeo,Jenselme/ngeo,ger-benjamin/ngeo,adube/ngeo,adube/ngeo,ger-benjamin/ngeo,pgiraud/ngeo,Jenselme/ngeo,adube/ngeo,adube/ngeo,kalbermattenm/ngeo,pgiraud/ngeo,kalbermattenm/ngeo,Jenselme/ngeo,kalbermattenm/ngeo,camptocamp/ngeo,camptocamp/ngeo,ger-benjamin/ngeo