Missouri Environmental Geology Atlas - 2007

The MEGA 2007 CD-ROM is a collection of interactive computer maps that allow the user access to more than 30 statewide Geographic Information System (GIS) data layers, all from their computer desktop. Significant improvements and additions have been made since MEGA's debut in 2003. New data layers have been added and many of the existing data layers updated. Among the additions is a water table map showing uppermost groundwater elevations, giving users an idea of what direction the groundwater is moving. Other new data layers include drill areas depicting requirements for well construction and a mine and mineral occurrence layer. A significant addition to the existing well log layer includes a simplified well log that lists various materials encountered during drilling. House and Senate district boundaries are also part of the collection. Additional data layers include: bedrock geology, well and spring locations, dyetrace data, State Park and Historic Site boundaries, geologic structures, sinkhole locations, alluvial floodplains, certified wells, public water supply wells, dye traces, surficial materials, stream hydrology and the public land survey system. This CD-ROM also provides public domain information such as streams, lakes, major roads, urban areas and county boundaries. Users will find a multitude of applications for the new data layers and improvements included with this new edition (MEGA 2007). Getting more information in the hands of decision-makers across the state will help everyone do their job better.