The Native Prairie Vegetation Inventory (NPVI) Polygons is a quarter section-based vegetation inventory that covers the southern part of Alberta. The native prairie is defined in the Native Prairie Conservation Action Plan as an area of unbroken grassland or parkland dominated by non-introduced species, and an area of previously broken grassland that has reverted back to natural vegetation (30 to 60 years). The Native Prairie Vegetation Inventory extends beyond the Grasslands Natural Region to include data for adjacent areas, such as the Cypress Hills. In addition to the Grassland Natural Region, the Native Prairie Vegetation Inventory (NPVI) Polygons include areas that belong to the Foothills Parkland, Central Parkland, Montane, Dry Mixedwood Boreal and Lower Foothills Natural Subregions.

The Central Parkland Vegetation Inventory (CPVI) Polygons is a dataset that was created to capture vegetation information for the Central (Aspen) Parkland Natural Subregion in Alberta. The Parkland Natural Region covers approximately 10% of the province and acts as a broad transitional area between the dry grasslands and the moist boreal forest. This region is characterized by productive soils, moisture levels and climatic conditions conducive to agriculture. The vegetation cover is a mosaic of aspen woodlands, wetlands, fescue grassland and riparian areas. The Central Parkland Natural Subregion is located in east-central Alberta. Other parkland subregions are located in the Foothills and the Peace River areas. The Central Parkland Vegetation Inventory (CPVI) Polygons is designed to be a vegetation / land use database for the Central Parkland Natural Subregion.