An engineering geological mapping program has been conducted to provide essential geological information for use by planners and engineers working in the Melton Development Area, Victoria.<br>A review of past and current examples of thematic mapping for land use purposes was initially conducted. A data base of over 800 sampled locations was collated from previous work, and supplemented by additional drilling and testing in areas where little was known of the geological materials. This information was compiled using available computer facilities and combined with traditional field mapping methods. A map folio presenting individual aspects of the engineering geology was produced.<br>Large areas of expansive soil have been identified and mapped, and an area affected by soil subsidence was examined in detail.<br>Statistical methods (block kriging) have been used to determine the thickness of soil in the map area. Assesments of the suitability for urban development have been made.<br>Computer draughting was used to produce the maps, providing the ability for rapid future revision.<br>