About: http://webisa.webdatacommons.org/280908472

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	There are no hard and fast rules, viewing distance is a factor as well, everything does not have to be 300 dpi, if so then billboards would not be possible as those are printed no in dots per inch, but dots per feet!
http://www.w3.org/ns/prov#wasQuotedFrom	wetpixel.com