Canadian Coastal Information System (CIS) - Backshore, Beaufort Sea Coast 1984, 1999 and 2000

Shore-zone classification data for the Canadian Beaufort Sea coast form part of a GIS database, the Coastal Information System (CIS), developed and maintained by the Geological Survey of Canada (GSC-Atlantic), Natural Resources Canada, at the Bedford Institute of Oceanography in Dartmouth, NS. Coastal attributes in the CIS have been interpreted and mapped from low-level, oblique, aerial photography and video imagery with accompanying audio commentary. The CIS is hierarchical in that coastal forms are classified based on four increasingly detailed levels of description. The coastal data consist of line segments with attributes describing the physical form and material at scales ranging from 1:10 000 to 1:250 000. In the CIS, the coast is divided into three shore-parallel zones (backshore, foreshore, nearshore). Each zone is segmented separately based on homogeneous physical characteristics. A glossary has been developed to control the language used to describe each zone. The use of objective physical criteria for coastal classification enhances the utility of the CIS for a wide variety of applications. The backshore is defined as the landward zone lying between higher high-water at large (spring) tides and the upper limit of shore-zone processes; it is acted upon by slope-failure processes, waves, wind, rainfall, or ice and covered by seawater only during severe storms with exceptionally high water levels. It is typically horizontal or rising landward and may be divided from the foreshore by the crest of the most seaward berm. The landward backslope of a spit or barrier beach is also considered to be part of the backshore unless the bay or lagoon shore of the barrier is mapped separately. Typical mapped backshore forms include cliffs, slopes, dunes, washover channels and fans, and wetlands, as well as artificial forms such as docks, ramps, seawalls, revetments, or other shore protection forms. Materials include combinations of ice, organics, mud, sand, gravel and boulders, rock, or artificial materials such as concrete, wood, or steel. Combinations of zonal form and material types can be queried to build more sophisticated classifications based on multiple criteria or empirical indices. For more information please refer to the datafile entitled: CCIN12119_20150218_Backshore_Extended_Metadata_FGDC.xml

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