In file album.style I can change the size of an icon by changing the scheme="default" form e.g. 34|17|50 to 34|40|50. In file teleatlas.map there is a parameter "zoom_max" for an icon. Changing this parameter for "Parking Area" from 30 to 4, parking areas will only appear together with all other icons. However changing this parameter for "Camping Ground" from 4 to 30, this will not have the efffect, that camping grounds are shown at the same scale as parking lots. How can I make that camping grounds are shown at the same scale level as parking lots?