The collection of map series held by BGS which correspond to the outputs of discrete projects. The maps often focus on a specific theme, and / or may have limited spatial coverage. The thematic maps include the following series: Applied Geology Maps (AGMs), also known as Environmental Geology Maps (EGMs) or Planning for Development maps, which were produced between 1975 and 1996 as part of 'geological background for planning and development' and preliminary sand and gravel projects carried out on behalf of the Department of the Environment, Scottish Development Department and the Scottish Office. Industrial Minerals Assessment Unit (IMAU) Mineral Assessment Report maps, published between 1971 and 1985 by the Institute of Geological Sciences. Oil-shale Seam Maps of the Lothians, published between 1977 and 1982 by the Institute of Geological Sciences (IGS) in Edinburgh.