Location of bottom video tracklines collected during field activity 2012-035-FA by the U.S. Geological Survey and Massachusetts Office of Coastal Zone Management in Ipswich Bay and Massachusetts Bay, Massachusetts, in August 2012 (polyline shapefile)

Accurate data and maps of sea-floor geology are important first steps toward protecting habitat, delineating marine resources, and assessing environmental changes due...精准的海底地质数据与海底地质图，是开展栖息地保护、划定海洋资源范围以及评估相关环境变化等工作的重要前置步骤。