Wetlands - Linear Features

SDE Feature Class

Tags
Wetlands, Swamps, marshes, bogs, fens, North Dakota, Deepwater habitats, Surface water, Hydrography

Description

This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the conterminous United States. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. By policy, the Service also excludes certain types of "farmed wetlands" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps.

Summary

The present goal of the Service is to provide the citizens of the United States and its Trust Territories with current geospatially referenced information on the status, extent, characteristics and functions of wetlands, riparian, deepwater and related aquatic habitats in priority areas to promote the understanding and conservation of these resources.

Credits

Use limitations

None. Acknowledgement of the U.S. Fish and Wildlife Service and (or) the National Wetlands Inventory would be appreciated in products derived from these data

Scale Range

Metadata 

Topics and Keywords 

Place keywords  North Dakota

Theme keywords  Wetlands, Swamps, marshes, bogs, fens, Deepwater habitats, Surface water, Hydrography

Citation 

Title Wetlands - Linear Features
Publication date 2006-10-01


Presentation formats* digital map


Series
Name Classification of Wetlands and Deepwater Habitats of the United States. U.S. Department of the Interior, Fish and Wildlife Service, Washington, DC. FWS/OBS-79/31.

Citation Contacts 

Responsible party
Organization's name U.S. Fish and Wildlife Service, Branch of Habitat Assessment
Contact's role  publisher


Contact information
Address
Delivery point Washington, D.C.



Responsible party
Organization's name U.S. Fish and Wildlife Service
Contact's role  originator


Resource Details 

Dataset languages  English (UNITED STATES)


Spatial representation type* vector


Supplemental information
*Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959


*Name NDHUB.WetlandsLinear

Extents 

Extent
Description
ground condition

Temporal extent
Beginning date 1977-01-01
Ending date
Indeterminate date now

Extent
Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -104.344107
*East longitude -96.125514
*North latitude 49.049763
*South latitude 45.761384
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude -922868.715957
*East longitude 1050451.657340
*South latitude 123100.415975
*North latitude 1294759.967310
*Extent contains the resource Yes

Resource Points of Contact 

Point of contact
Individual's name John Cooper
Organization's name U.S. Fish and Wildlife Service
Contact's position Chief - Branch of Habitat Assessment
Contact's role  point of contact


Contact information
Phone
Voice 703-358-2161
Fax 703-358-1869

Address
Delivery point U.S. Fish and Wildlife Service, 4401 North Fairfax Drive
City Arlington,
Administrative area VA
Postal code 22203
Country US
e-mail addressjohn_cooper@fws.gov



Resource Maintenance 

Resource maintenance

Resource Constraints 

Constraints
Limitations of use
None. Acknowledgement of the U.S. Fish and Wildlife Service and (or) the National Wetlands Inventory would be appreciated in products derived from these data

Spatial Reference 

ArcGIS coordinate system
*Type Projected
*Geographic coordinate reference GCS_North_American_1983
*Projection ND_Albers
*Coordinate reference details
Projected coordinate system
X origin -49260099.998572998
Y origin -29320999.999513399
XY scale 2147.4836449999998
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.0037252903036660901
Z tolerance 1.9999999999999998e-005
M tolerance 1.9999999999999998e-005
High precision true
Well-known text PROJCS["ND_Albers", GEOGCS["GCS_North_American_1983", DATUM["D_North_American_1983", SPHEROID["GRS_1980", 6378137.0, 298.257222101]], PRIMEM["Greenwich", 0.0], UNIT["Degree", 0.0174532925199433]], PROJECTION["Albers"], PARAMETER["False_Easting", 0.0], PARAMETER["False_Northing", 0.0], PARAMETER["Central_Meridian", -100.5], PARAMETER["Standard_Parallel_1", 46.5], PARAMETER["Standard_Parallel_2", 48.5], PARAMETER["Latitude_Of_Origin", 45.5], UNIT["Foot_US", 0.3048006096012192]]

Reference system identifier
*Value 0


Spatial Data Properties 

Vector
*Level of topology for this dataset  geometry only


Geometric objects
Feature class name NDHUB.WetlandsLinear
*Object type  composite
*Object count 309218



ArcGIS Feature Class Properties
Feature class name NDHUB.WetlandsLinear
*Feature type Simple
*Geometry type Polyline
*Has topology FALSE
*Feature count 309218
*Spatial index TRUE
*Linear referencing FALSE



Data Quality 

Scope of quality information
Resource level  dataset




Data quality report - Topological consistency
Evaluation method
Polygon and chain-node topology are present. Every polygon has a label.





Data quality report - Conceptual consistency
Measure description
Polygon and chain-node topology are present. Every polygon has a label.





Data quality report - Completeness omission
Measure description
This data set represents the extent of wetlands and deepwater habitats that can be determined with the use of remotely sensed data and within the timeframe for which the maps were produced. Wetlands are shown in all of the conterminous 48 states and the District of Columbia. The accuracy of image interpretation depends on the quality of the imagery, the experience of the image analysts, the amount and quality of the collateral data, and the amount of ground truth verification work conducted. There is a margin error inherent in the use of imagery, thus detailed on-the-ground inspection of any particular site, may result in revision of the wetland boundaries or classification, established through image analysis. Wetlands or other mapped features may have changed since the date or the imagery and/or field work. There may be occasional differences in polygon boundaries or classifications between the information depicted on the map and the actual conditions on site.





Data quality report - Quantitative attribute accuracy
Measure description
The source data was checked using standard review procedures. Attributes were checked by using visual inspection as well as automated verification routines. Quality of the attribute information varies with age and mapping protocols used when individual maps were prepared



Quantitative test results
Value All polygons are attributed.




Lineage 

Process step
When the process occurred 2004-01-01
Description
The file was converted to NAD83 in geographic coordinates, and saved in geodatabase format.





Process step
Description
Original stable base hard copy maps of wetland and deepwater habitats were created based on USGS state and quadrangle boundaries. These maps were converted to digital files using various software packages (WAMS, ARC and others). The digital files were stored as ESRI Import/Export files corresponding to a single 1:24,000 USGS quadrangle. These digital files were imported and converted to ESRI Coverage format and checked for topological and attribute errors. All coverages were converted from a UTM map projection to an Alber's Equal Area map projection and the horizontal datum was converted from NAD27 to NAD83 were necessary. Polygons attributed as "Uplands" were removed from the dataset and polygons were merged at quadrangle boundaries where the quadrangle line divided polygons with the same attribute. The data was loaded into a seamless SDE geodatabase for the conterminous United States. These steps were conducted using both Arc Macro Language (AML) and ArcMap editing tools. All point data from the original ESRI Coverages were buffered by 11.28 meters (1/10 of an acre) and incorporated into this polygon feature class. Linear features from the original ESRI Coverages were merged at quadrangle boundaries where the quadrangle line divided lines with the same attribute. Linear data is stored in a separate feature class. Further data improvements included the conversion of all old wetland codes that contained 'OW' to the new code containing 'UB'. All polygons labeled as 'OUT', 'No Data' and 'NP' were removed from the database.



Source data
Relationship to the process step used


Source citation
Alternate titles  NWI








Source data
Description
Spatial information



Source medium name  hardcopy—printing on paper
Resolution of the source data
Scale denominator 0

Source citation
Title Wetlands and Deepwater Habitats of the Conterminous United States


Series
Name National Wetlands Inventory Maps

Responsible party
Organization's name U.S. Fish and Wildlife Service
Contact's role  publisher


Contact information
Address
Delivery point Washington, D.C.



Responsible party
Organization's name U.S. Fish and Wildlife Service
Contact's role  originator




Extent of the source data
Description
Various dates

Temporal extent
Beginning date 1977-01-01
Ending date
Indeterminate date now



Distribution 

Distribution format
*Name SDE Feature Class


Transfer options
Online source
Locationhttp://www.fws.gov/nwi/

Fields 

Details for object NDHUB.WetlandsLinear 
*Type Feature Class
*Row count 309218
Definition
Reference:  Cowardin et al. 1979

Definition source
U.S. Fish and Wildlife Service



Field OBJECTID
 
*Alias OBJECTID
*Data type OID
*Width 4
*Precision 10
*Scale 0
Field description
Internal feature number.

Description source
ESRI

List of values
Value Polygon
Description 2-dimensional element.
Enumerated domain value definition source ESRI GIS software


*Description of values
Sequential unique whole numbers that are automatically generated.





Field ATTRIBUTE
 
*Alias ATTRIBUTE
*Data type String
*Width 20
*Precision 0
*Scale 0
Field description
NWI Code



Field SHAPE
 
*Alias Shape
*Data type Geometry
*Width 4
*Precision 0
*Scale 0
Field description
Feature geometry.

Description source
ESRI

Description of values
Coordinates defining the features.





Field SHAPE.LEN
 
*Alias SHAPE.LEN
*Data type Double
*Width 0
*Precision 0
*Scale 0




Field REGIME
 
*Alias REGIME
*Data type String
*Width 25
*Precision 0
*Scale 0
Field description
Subclass modifier of the NWI code describing the water regime





References 

Aggregate Information
Association type  cross reference


Aggregate resource name
Title Wetlands and Deepwater Habitats of the Conterminous United States


Edition Version 1.0


Responsible party
Organization's name U.S. Fish and Wildlife Service
Contact's role  publisher


Contact information
Address
Delivery point Washington, D.C. USA



Responsible party
Organization's name U.S. Fish and Wildlife Serivce, National Wetlands Inventory
Contact's role  originator




Metadata Details 

Metadata language English (UNITED STATES)
Metadata character set  utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata  dataset
Scope name* dataset


*Last update 2016-02-17


ArcGIS metadata properties
Metadata format ArcGIS 1.0


Created in ArcGIS for the item 2010-03-03 17:30:18
Last modified in ArcGIS for the item 2016-02-17 12:45:48


Automatic updates
Have been performed Yes
Last update 2016-02-17 12:45:48

Published to an ArcIMS Metadata Service Published



Metadata Contacts 

Metadata contact
Individual's name National Wetlands Inventory Maps
Organization's name U.S. Fish and Wildlife Service Division of Federal Program Activities
Contact's position Chief, Branch of Habitat Assessment
Contact's role  point of contact


Contact information
Phone
Voice 703-358-2161
Fax 608-358-1869

Address
Type both
Delivery point 4401 North Fairfax Drive
City Arlington
Administrative area VA
Postal code 22203
Country US
e-mail addressjohn_cooper@fws.gov



Metadata Constraints 

Security constraints
Classification  unclassified
Classification system None


Additional restrictions
None