Three sets of maps between them provide an almost complete coverage of the pre-settlement boundaries of natural temperate grasslands within the study area. They are the boundaries delineating grasslands of the Monaro (developed as part of broad vegetation mapping there (Costin, 1954; digitised by NPWS in 1998), the grassland boundaries in the ACT (digitised by ACT P&CS WRM) and the pre-settlement boundaries developed as a central program of this project, and covering a significant portion of South Eastern Highlands Bioregion. In Costin’s (1954) map of the vegetation of the Monaro region, the map units delineated represent Costin’s vegetation alliances. ACT vegetation was mapped by Pryor in 1939. This mapping included 5 alliances of woody species and one grassland alliance. This interpretation of ACT grassland areas has survived into modern mapping interpretations with some modifications. The current products mapped new boundaries for areas beyond the Monaro and ACT. This product present pre-European settlement grassland boundaries for an area covered by a series of 1:100 000 map sheets (Braidwood, Boorowa, Brindabella, Canberra (excluding the ACT section), Crookwell, Goulburn, Gunning and Yass). VIS_ID 4099