National Hydro Network -GeoBase Series

Arctic_Ocean National Hydro Network -GeoBase Series - Index of Arctic Ocean This is a subset of the larger single NHN Index file ("Index of available files") published on the Open Government of Canada Portal (<a href="https://open.canada.ca/en">open.canada.ca/en</a>) for the Shape (ESRITM) format. This subset layer was created by a CanWIN staff. Pre-packaged shapefiles of individual watersheds can be downloaded from the Open Government of Canada Portal using the Dataset Name attribute to identify each watershed shapefile.  The NHN Index is a national index that groups together all “NHN Work Unit Limits” at a specific time “T” for the entire Canadian landmass. This index is updated and published at interval on the GeoBase portal according to a “per release” approach, synchronized with NHN data publication. Update and publication frequency is determined according to NHN data publication. The NHN Index was first published March 20, 2008. Because it is generated at a specific time “T” and comprises all “NHN Work Unit Limits in the country, those limits are thus at different editing stages, where some have been fully edited and others partially or not at all. Moreover, it is important to realize that “NHN Work Unit Limits” will be modified over time, for example when new more up-to-date source data become available. The NHN Index is distributed in SHAPE (ESRITM) format. This document thus provides its description for this format. In particular, it describes file names, features and attributes that make up the index. Cartography Coastline Drainage Earth Sciences GeoBase Geographic Information Systems Geographic data Geography Hydro Hydrographic Network Hydrography Hydrology Lakes NHN Natural resources Network Rivers Surface water Water Watercourses Watersheds EPSG:4617 -143.5024667 -58.0 52.12812120000001 83.5 NRCan text/xml