Table 1.

Bankline attribute field requirements for digital shoreline analysis system (DSAS).

Field Name	Data Type	Attribute Addition	DSAS Requirement
OBJECTID	Object identifier	Auto generated	Required
SHAPE	Geometry	Auto-generated	Required
SHAPE_Length	Double	Auto-generated	Required
DATE_ (DSAS_date) *	Text (Length = 10 OR Length = 20)	User-created*	Required
UNCERTAINTY (DSAS_uncy) *	Any numeric field	User-created*	Required
SHORELINE_TYPE (DSAS_type) *	Text	User-created*	Optional (unless dataset includes the proxy-datum bias, then this field is required)