Variations paysagères, Observatoire photographique du paysage du Parc Naturel Transfrontalier du Hainaut, 2009-2011
60 points of view photographed in the spring 2009 have been photographed at the exact same spot in the winter 2009-2010 and in the spring 2011

The purpose of the work is to be able to observe changes in the landscape over time

PNTH includes the PNR Scarpe-Escaut on the French side and the Parc naturel des Plaines de l'Escaut on the Belgian side.

See also http://www.observatoire-paysages.pnth.eu/