NHDAreaEventFC

Area event must be tied to a NHDWaterbody. They cannot be linked to a linear or point feature.  Area events are built into the NHD Model but are not accepted back into the National Database. They are meant to be used on an individual basis.

.

An impaired Waterbody is an example of an Area Event

 

The attributes associated with NHDAreaEventFC are as follows:

Field Name

Definition

Permanent_Identifier

40-char GUID value that uniquely identifies the occurrence of each event in The National Map.

EventDate

Date an event was created.

ReachCode

Reach Code on which the event is located.

ReachSMDate

Reach Version Date

ReachResolution

Source resolution. 

Feature_Permanent_Identifier

Permanent_Identifier of NHD feature that the event is referenced to.

FeatureClassRef

NHD feature class that holds FeatureComID

Source_Originator

Originator of the event

Source_DataDesc

Description of the entity

Source_FeatureID

Identifier of the entity used in the  source data.

FeatureDetailURL

URL where detailed event entity data can be found

EventType

Type of entity in an event