About: http://webisa.webdatacommons.org/418867124

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Firstly, in order to understand moments, and especially the difference and the usage of spatial (what the OP calls raw), central, and central normalized moments, I found two very good materials:
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com