Common_Object - Fields present in all WBD Base Tables.

 

Field Name

Definition

Source_Feature_ID

Identifier of the entity used in the  source data.

Meta_SourceID

40-char GUID value that uniquely identifies a metadata process description in The National Map.

Source_DataDesc

Description of source data used to update WBD.

Source_Originator

Originator of Source Data used to update WBD.

 

WBD_Attributes - Attributes of the Hydrologic Units.

Field Name

Definition

HUC

Hydrologic Unit Code

Gaz_ID

Unique identifier assigned by GNIS, length 10.

Name

Name assigned to each level (2,4,6,8,10, and 12) of hydrologic unit

HU_Class

Numeric identifier for each level (2,4,6,8,10, and 12) of hydrologic units.
HU_Type Geomorphic and other considerations used to  develop the hydrologic unit.
NContrib_SqKm Area that does not flow toward the outlet of a hydrologic unit.
LoadDate

Date class is loaded.

Feature_PermID

40-char GUID value that uniquely identifies the occurrence of each feature in The National Map. National Database primary key.

 

FeatureToHUMod- Reflects modifications to Hydrologic Units.

Field Name

Definition

HU_Mod

A collection of two-character, uppercase abbreviation(s) for either (1) the type of modification to natural overland flow that alters the location of a Watershed boundary or (2) the special conditions GF-ground-water flow, GL-glacier, IF-ice field, OF-overbank flow, KA-karst, NC-noncontributing area, and IT-interbasin transfer.

Feature_PermID

40-char GUID value that uniquely identifies the occurrence of each feature in The National Map. National Database primary key.