--- On Wed, 26/8/09, Liz <edodd at billiau.net> wrote: > could we simply extend source=survey with a year > and source=landsat similarly? > > source=survey09 > source=landsat_trace09 > source=yahoo_trace08 I'd seperate the information out into 2 key pairs: source=survey survey_date=20090826 or source=yahoo imagery_date=20070101 or just source:date=*