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3D Hydrography Program 3DHP_all: Waterbody

By NGP Standards and Specifications

Waterbody is a polygon spatial table that contains polygonal representations of water features.

waterbody (spatial table)

waterbodyfeaturetype (domain)

waterbody (spatial table)- Waterbody is a polygon spatial table that contains polygonal representations of water features that uses the waterbodyfeaturetype domain.

Name (Alias) Definition Type Allow Nulls Length Domain Default Values Comments
id3dhp Unique identifier for 3DHP features.  Text Yes 7 - -

This is a base-36 7-digit alphanumeric unique identifier that is not persistent.

Applied to waterbody features in this case.
featuredate Date the feature was loaded into the 3DHP core database. Date Yes - - - -
mainstemid

A cross-dataset identifier for all flowlines that represent

the headwater to outlet path of a river.

 Text Yes 200 -  

A mainstem is equivalent to a feature with the same levelpathid in NHDPlus HR.

The text field will be a <geoconnex.us>*.
gnisid

A permanent, unique number assigned by the Geographic

Names Information System (GNIS)** to a geographic feature

name for the sole purpose of uniquely identifying that name.

 Long Integer Yes - - -

gnisid = "null" if no name is associated with the feature. The gnisid is conflated

from points and assigned to features. The most recent name, and any historic

names, can be retrieved from the GNIS data base using the gnisid.
featuretype Feature type description. Short Integer Yes - waterbodyfeaturetype - -
featuretypelabel The name of the feature type. Text Yes 50 - -

The featuretype label is based on the coded value description in the featuretype field.

Allows label display in non-ESRI datasets.
areasqkm

Area of feature in square kilometers based on regional spatial

reference systems.

 Double Yes - - -

Computed in projections based on specific locations, please see the Spatial Reference

System Section of this specification for more information. 

*More information about geoconnex can be found here: https://waterdata.usgs.gov/blog/nldi-geoconnex/.

**More information about GNISID can be found here: https://www.usgs.gov/tools/geographic-names-information-system-gnis.

waterbodyfeaturetype (domain)- The waterbody spatial table uses the waterbody feature type coded values domains to classify the featuretype attribute.

Code Description Definition
1 River A body of flowing water.
2 Canal A body of flowing water that receives inflow from upstream but not the surrounding catchment.
3 Lake A body of standing water surrounded by land. Includes natural and manmade lakes, ponds and reservoirs.
4 Ocean or Great Lake

A body of salt or fresh water that covers much of the earth. Serves as the terminus of network features and

as the land/water boundary at oceans or great lakes.

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