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The most widely used approach to sensitive environment mapping in the U.S. is NOAA's Environmental Sensitivity Index (ESI). This approach systematically complies information in standard formats for coastal shoreline sensitivity, biological resources, and human-use resources. ESI maps are useful for identifying sensitive resources before a spill occurs so that protection priorities can be established and cleanup strategies designed in advance. Using ESIs in spill response and planning reduces the environmental consequences of the spill and cleanup efforts. This update includes data in a Geodatabase format, for use with the ArcGIS product line, and updates to the original Hawaii .PDF files. Original data sources range from 1978-2001 and data were compiled 2000-2001.