About: http://webisa.webdatacommons.org/120618669

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	In effect, the fog density is a function of distance. f = exp(-d*c) -- GL_EXP2 f = exp(-(d*c)^2) -- GL_EXP f = (e-c)/(e-s) -- GL_LINEAR Fog coordinates allow you to set the 'c' value of the equation and specify values directly for this.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com