+ option_layer_maplint: OSM - Maplint (fazioù)
+ option_layer_nearmap: "Aostralia : NearMap"
+ option_layer_ooc_25k: "Istor UK : 1:25k"
+ option_layer_ooc_7th: "Istor UK : 7vet"
+ option_layer_ooc_npe: Istor UK NPE
+ option_layer_tip: Dibab an drekleur da ziskwel