The Monaro and Werriwa Tablelands Cool Temperate Grassy Woodlands (respectively Monaro and Werriwa) have been nominated by the NSW Scientific Advisory Committee as Critically Endangered Ecological Communities (NSW Threatened Species Scientific Committee (2019). This data layer delineates the extent of these communities as a single presence surface. The extent is derived first by modelling of the potential extent then refined by rigorous 3-D aerial photo interpretation of high resolution ADS imagery.