The Base Hydrography Point Update layer contains hydrographic point features representing the locations of water or water related features, it is an update of the Base Features Hydrography Points in Central and Southern Alberta aerial photography and various sources of provincial base data.

Base Waterbody Polygon Update is the Alberta Environment and Protected Areas base hydrography polygon dataset, it is an update of the Base Features Hydro Polygons in Central and Southern Alberta using aerial imagery, digital elevation models (DEM's) and various sources of provincial base data.

The Base Hydrography Point Event layer contains hydrographic point features representing the locations of water or water related features captured through the 1:20000 Provincial Base Mapping Project, the 1:50000 Resource Access Mapping Program, the Alberta Vegetation Inventory Program and the Federal Government National Topographic Data Base 1:50000 mapping.

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.