The National Carbon Sequestration Database and Geographic Information System (NATCARB) Coal spatial database is a small-scale (large-area) overview of carbon dioxide (CO2) geologic storage potential in unmineable coal areas across the USA and parts of Canada. This data layer reflects the best available knowledge regarding the location of carbon sequestration potential in the USA and Canada, both onshore and offshore. Version Log: v1101 - Initial release for Atlas III; v1102 - no changes. Version not released; v1103 - Updated data for WESTCARB. Metadata revised.; v1104 - no changes to coal layer; v1204 - Initial release for Atlas IV. New data submitted by all regional partnerships. NATCARB is administered by the US Dept. of Energy (DOE) National Energy Technology Laboratory (NETL) and contains data provided by several Regional Carbon Sequestration Partnerships (RCSP). RCSPs orginally developed the data per individual geologic storage resource, or as continuous surface models, and then converted these data into a 10 km X 10 km vector "grid". The NATCARB Team at the Kansas Geological Survey compiled the regional datasets into a single, seamless layer.