Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Σχηματισμός ισοϋψών αναχωμάτων-el#Sense
Confection de bourrelets isohypses-fr#Sense
Confection de bourrelets de niveau-fr#Sense
Creazione di dorsali isoipse-it#Sense
Contour ridging-en#Sense