Abstract: To meet the growing requirements for suitable and safe constructional lands, methods of land-use evaluation are being rapidly developed in engineering geology. The paper deals with setting up a foundation suitability map for Nanjing city. The bedrock geology, topography, the depth to the bedrock and the Quaternary geotechnical soil maps are utilized to achieve this goa1. For simplicity and from practical point of view, the pre-existing maps are modified in simple versions. Each map is separated into areas of different ranges. The zoning map of the engineering geological conditions is prepared by simple superimposing transparent overlays of the four basic data maps. Each zone is rated and five classes of ground conditions fire fabricated.