Historical
BS EN ISO 13565-1:1998
Geometric Product Specifications (GPS). Surface texture: Profile method. Surfaces having stratified functional properties. Filtering and general measurement conditions (British Standard)
Decribes a filtering method for use with surfaces having stratified functional properties. The surfaces have a relatively small amount of waviness. This filtering method suppresses the valley influence on the reference line such that a more satisfactory line is generated.
British Standards Institution [bsi]