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ESI data characterize coastal environments and wildlife by their sensitivity to spilled oil. The ESI data include information for three main components: shoreline habitats; sensitive biological resources; and human-use resources. These data are from a single DVD product that is a re-release of Puerto Rico ESI data that was originally a 2 CD-ROM set. These are the data that were used to create the May 2000 hard copy Puerto Rico ESI atlas. This updated product was released in December 2006. The new DVD product was produced in large part to accommodate new and ever changing technologies in the world of digital mapping. The data are now included in a Geodatabase format, for use with ESRIs ArcGIS product line. An .mxd file, also included, has the geodatabase feature classes symbolized with standard ESI colors and hatch patterns and relates are pre-established to the ESI data tables. However, the original AVPROJ, MOSS files, and documentation are still included as part of the product. Source data dates vary and range from 1954-1998, and are documented in the METADATA files. The original (Puerto Rico) PDFs have been modified so that the seasonality, or back of the map, pages are a part of each map document. This will make it easier to distribute and print individual maps and ensure that the supporting information is always included. The original product data was archived at NODC under the accesion number 0006584.