Base Hydrography Update Index depicts the extent of the current HUC 8 (Hydrologic Unit Code) watersheds completed in 2018-2021.

Base Waterbody Polygon Update is the Alberta Environment and Protected Areas base hydrography polygon dataset, it is an updated of the Base Features Hydro Polygons in Southern Alberta from orthophoto and various sources of provincial base data.

Base Hydrography Update is the Alberta Environment and Protected Areas base hydrography dataset, it is an updated of the Base Features Hydrography in Southern Alberta from orthophoto and various sources of provincial base data.