A surface hydrographic element is a surface unit containing a superficial aquatic environment:
— areas covered with permanent or non-permanent fresh water,
— areas covered with permanent or non-permanent salt water,
the glaciers, neved.
and whose characteristics (attributes) are homogeneous. A surface element is located by one side. Some attributes are managed by the IGN: Nature, type.
A hydrographic entity is broken down into surface hydrographic elements.
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