This polygon shape file is a 1:25,000 – 1: 50 000 environmental dataset combining 16 input data sources. These are outlined in the lineage statement. The input data sets identify agreed HEV criteria for the purposes of regional strategic planning and other environmental assessment projects that require identification of significant biodiversity values. This project was undertaken by Planning Services Unit, OEH with input from all the Planning teams in Regional Operations, OEH. The Illawarra High Environmental Values dataset covers the Illawarra Regional Growth Planning area.