About: http://webisa.webdatacommons.org/391293819

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	If you lighten them up labels and other info can be overlaid and still be readable.You might want to take a look at Tom Patterson's site shadedrelief.comHe is a grandmaster of relief shading and other techniques.
http://www.w3.org/ns/prov#wasQuotedFrom	cartotalk.com