Toronto and Region Conservation Authority DataToronto and Region Conservation Authority (TRCA) data represents various natural features for the TRCA jurisdiction, which encompasses the Etobicoke, Miimico, Humber, Don, Highland, Rouge, Petticoat, Duffins and Carruthers river watersheds, and the Lake Ontario shoreline from Mississauga to Ajax. Data sets include natural cover, flora, fauna, contours, vegetation and Ecological Land Classification (ELC), watershed, water bodies, and more.