Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Sohlengefälle-de#Sense
Gradiente del suelo-es#Sense
Bottom gradient-en#Sense
Pente du sol-fr#Sense
Inclinazione del fondo-it#Sense
Inclinaison du sol-fr#Sense