RFI/Sources Sought. Responses will assist the USGS in understanding available analytical approaches and organizational capabilities relevant to conducting an economic analysis of the USGS Earth Mappin... RFI/Sources Sought. Responses will assist the USGS in understanding available analytical approaches and organizational capabilities relevant to conducting an economic analysis of the USGS Earth Mapping Resources Initiative (Earth MRI) within the Geology, Energy, and Minerals Mission Area (GEMMA). REFERENCE ATTACHMENT FOR DETAILS AND INSTRUCTIONS.