Title: CanMap Water 2009.4 Date: 2009 Geography: Canada Publisher: DMTI Spatial Inc. Availability: Available for direct download by Ryerson community members. More info. Title: National Hydro Network (NHN) Date: 2007 Geography: Canada Publisher: Natural Resources Canada Availability: Freely available for all to download from the web. More info. Title: Toronto and Region Conservation Authority (TRCA) Geospatial Data Date: 2007 Geography: Greater Toronto Area (GTA) Publisher: Toronto and Region Conservation Authority (TRCA) Availability: Available for direct download by Ryerson community members. More info.