A map made by assembling a number of ORTHOPHOTOGRAPHS into a single, composite picture.

A surface parallel to the surface of deposition, which may or may not have a physical expression. The original attitude of a bedding plane should not be assumed to have been horizontal. See also CROSS-BEDDING.

The current system caused by WAVE action in and near the BREAKER ZONE, and which consists of four parts: the SHOREWARD MASS TRANSPORT of water; LONGSHORE CURRENTS; RIP CURRENTS; and the LONGSHORE movement of the expanding heads of RIP CURRENTS.

Roughly triangular PROMONTORY of land jutting into the SEA, often consisting of mobile material, i.e. a beach form.

Any current flowing towards the SHORE.

A term applied to shelves that presently experience deposition of river-derived SEDIMENTS. See also DETRITUS.

The least DEPTH in the navigable parts of a waterway, governing the maximum draft of vessels that can enter.

A period of 19 years adopted by the National Ocean Service as the period over which observations of TIDES are to be taken and reduced to average values for TIDAL DATUMS.

Also known as geographical mile, its length is 1852 meters (6076.115 feet), approximately 1.15 times as long as the statute mile of 5280 feet.

See NEAP TIDE.