The Rangelands Desktop Assessment Tool (DAT) is an application to rapidly assess Native Vegetation Council (NVC) Significant Environmental Benefit (SEB) values for clearance and offset applications in the Cooper-Eromanga Basin region. The Rangelands DAT method uses a combination of information derived from the existing Rangelands Assessment Manual (RAM) and Scoresheet method (Native Vegetation Branch 2017), Flora and fauna communities of the Cooper-Eromanga Basin study (Figure 1, Hobbs et al. 2017), and Landsat satellite fractional cover and water observations from space data. This application dramatically reduces the cost of these assessments by virtually eliminating the need for on-ground surveys and detailed reports required under the alternate RAM and Scoresheet method. The Rangelands DAT application also provides uniform and consistent assessment results which eliminates biases or errors which would result from field observations influenced by variations in seasonal conditions or consultants’ knowledge, interpretation and ecological skills. One of the greatest strengths of the DAT is that provides mapping of important ecological assets and permits forward planning to minimise environmental risks and costs of new developments in the region. The application is strongly supported by major energy industry operators in the Cooper-Eromanga Basin region. Rangelands DAT information is available at a spatial resolution of 30 x 30 metres.