ESIL

The item ESI contains values representing the ESI shoreline type. In many cases shorelines are ranked with multiple codes, such as "6B/3A" (listed landward to seaward from left to right). The first code, "6B", is the most landward shoreline type and the second code, "3A", is the shoreline type closest to the water. Singular shoreline types are listed below. No multiple codes are listed, but all multiple codes included in the data set can be assembled from the codes described. The ESI rankings progress from low to high susceptibility to oil spills. To determine the sensitivity of a particular intertidal shoreline habitat, the following factors are integrated: 1) Shoreline type (substrate, grain size, tidal elevation, origin); 2) Exposure to wave and tidal energy; 3) Biological productivity and sensitivity; 4) Ease of cleanup. Prediction of the behavior and persistence of oil in intertidal habitats is based on an understanding of the dynamics of the coastal environments, not just the substrate type and grain size. The intensity of energy expended upon a shoreline by wave action, tidal currents, and river currents directly affects the persistence of stranded oil. The need for shoreline cleanup activities is determined, in part, by the slowness of natural processes in removal of oil stranded on the shoreline. The potential for biological injury, and ease of cleanup of spilled oil are also important factors in the ESI ranking. In general, areas exposed to high levels of physical energy, such as wave action and tidal currents, and low biological activity rank low on the scale, whereas sheltered areas with associated high biological activity have the highest ranking.

Type of geographic feature.

Type of regional environment.

If multiple shoreline types appear in ESI classification, this field represents the highest value (most sensitive type); otherwise it is the same value as the ESI field.

The numeric representation and physical description of the first (or only) ESI type found in the ESI field.

The numeric representation and physical description of the second ESI type in the ESI field (NULL if not applicable).

The numeric representation and physical description of the third ESI type in the ESI field (NULL if not applicable).

This field is used for symbolizing the ESI shoreline based on a generalized classification scheme; if multiple generalized types occur, this will reflect the highest value.

The numeric representation and physical description of the generalized ESI shoreline type. See the NOAA ESI Guidelines for the ESI to GENERALIZED_ESI_TYPE crosswalk.

Source identifier that links to the SOURCES data table. This ID indicates the source of a vector line segment.

Source identifier that links to the SOURCES data table. This ID indicates the source of the ESI classification, typically the imagery used for photo-interpretation, of a line segment. Vector features that were not surveyed or do not qualify for an ESI classification have a value of -1.