Montana Subbasin (4th-code) Hydrologic Units

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Montana Natural Resources Conservation Service State Office
Publication_Date: 2006
Title: Montana Subbasin (4th-code) Hydrologic Units
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Bozeman, Montana
Publisher: Montana Natural Resources Conservation Service
Online_Linkage: <http://nris.mt.gov/nsdi/nris/shape/subbasin24k.zip>
Online_Linkage: <http://nris.mt.gov/mapper>
Online_Linkage: <http://nris.mt.gov/bundler>
Description:
Abstract:
This data set is a hydrologic unit boundary layer to the Sub-basin (8-digit) 4th level for the State of Montana. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "FGDC Proposal, Version 2.0 - Federal Standards For Delineation of Hydrologic Unit Boundaries 10/01/04" (<http://www.ftw.nrcs.usda.gov/huc_data.html>). Polygons are attributed with hydrologic unit codes for 4th level sub-basins, name, size, downstream hydrologic unit, and non-contributing areas.

This layer was derived by dissolving the internal boundaries of 6th level watersheds to form 4th level units. The majority of this metadata describes the creation of the 6th level watersheds.

New data was not available for the Lower Kootenai River or Moyie River Sub-Basins. The data for these basins was copied from the old, 1:100,000 fifth-code HUC layer, described at <http://nris.mt.gov/nsdi/nris/hd109.html>.

Purpose:
This data set is intended to be used as a tool for water-resource management and planning activities, particularly for site-specific and localized studies requiring a level of detail provided by large-scale map information. The dataset will be appended to a larger seamless nationally consistant geospatial database as other states complete their portion of the watershed boundary dataset.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2006
Currentness_Reference: Publication date of sources
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -116.413582
East_Bounding_Coordinate: -102.791553
North_Bounding_Coordinate: 49.173993
South_Bounding_Coordinate: 43.764268
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: inlandWaters
Theme_Keyword: elevation
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: HUC
Theme_Keyword: Hydrologic Units
Theme_Keyword: Hydrologic Unit Code
Theme_Keyword: Region
Theme_Keyword: Sub-region
Theme_Keyword: Basin
Theme_Keyword: Sub-basin
Theme_Keyword: Watershed
Theme_Keyword: Watershed Boundaries
Theme_Keyword: boundaries
Theme_Keyword: Subwatershed
Theme_Keyword: WBD
Theme_Keyword: Watershed Boundary Dataset
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Montana
Place_Keyword: Missouri River
Place_Keyword: Columbia River
Place_Keyword: South Saskatchewan River
Access_Constraints: None
Use_Constraints:
The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in Montana. The Natural Resource Conservation Service should be acknowledged as the data source in products derived from these data. The Montana Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data from the source distributor.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Montana Natural Resources Conservation Service
Contact_Person: Tom Potter
Contact_Address:
Address_Type: mailing address
Address: 10 E Babcock, Fed Bldg Rm 443
City: Bozeman
State_or_Province: Montana
Postal_Code: 59715
Contact_Voice_Telephone: 406-587-6968
Contact_Electronic_Mail_Address: thomas.potter@mt.usda.gov
Contact_Instructions: Please email questions and requests.
Data_Set_Credit:
Funding for the Montana Watershed Boundary Dataset (WBD) was provided by the Natural Resources Conservation Service, the U.S. Forest Service, and the Montana Natural Resource Information System (NRIS). Representatives from all three organizations contributed a substantial amount of time and salary towards quality review of the dataset.
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.780

Data_Quality_Information:
Logical_Consistency_Report:
The layer is topologically correct in that there are no overlaps or gaps between the polygons. The line feature coordinates of the accompanying hydrologic unit boundary layers are identical to the coordinates of the polygons they form boundaries of.
Completeness_Report:
All hydrologic units of Montana except for the Moyie River and Lower Kootenai basins are included.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The WBD was produced using Enhanced Digital Raster Graphics (DRG-Es) digital images as source map. Data completeness for DRG files reflect content of the source graphic and may therefore be reflected in the completeness and accuracy of the WBD. The map was digitized from USGS 1:24,000-scale digital raster graphic base maps, with an inherited error of +/- 40 feet according to USGS National Map Accuracy Standards. Digitized line locations were held to the +/- 40 foot accuracy standards by ensuring that all lines were within a 12 meter buffer of where visual interpretion put the actual boundary. Any lines outside the buffer were corrected. It is estimated that the errors detected were less than 10%. It should be noted that while general rules of hydrology were used (i.e. water flows downhill), the location of boundaries is still somewhat subjective as the 1:24,000-scale DRG-E do not always provide enough information for identifying the location of the boundaries. In these instances group consensus was used. Please refer to the methods section for more details on watershed delineation rules. As with the original DRGs, DRG-E is cast in the Universal Transverse Mercator projection and is referenced to the NAD27 datum. When the drg-es are used in the NAD83 datum the alternate world files only approximate the NAD83 by shifting the coordinates of the imagery. The total error introduced using this shift is less than 2 meters for all DRG-E imagery.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Montana Natural Resources Conservation Service State Office
Publication_Date: 2006
Title: Montana Subwatershed (6th-code) Hydrologic Units
Publication_Information:
Publication_Place: Bozeman, MT
Publisher: U.S. Natural Resources Conservation Service
Online_Linkage: <http://nris.mt.gov/nsdi/nris/subwatershed.html>
Source_Scale_Denominator: 24000
Source_Contribution: The data was derived from this source.
Process_Step:
Process_Description:
Dissolve 6th-code hydrologic unit polygons on the HUC_8 field to form 4th-code hydrologic units. Assign values to the Name, States, and Downstream database fields.
Process_Date: 200611
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Gerry Daumiller
Contact_Organization: Montana State Library
Contact_Voice_Telephone: 406-444-5358
Contact_Electronic_Mail_Address: gdaumiller@mt.gov

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 100

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Lambert Conformal Conic
Lambert_Conformal_Conic:
Standard_Parallel: 45.000000
Standard_Parallel: 49.000000
Longitude_of_Central_Meridian: -109.500000
Latitude_of_Projection_Origin: 44.250000
False_Easting: 600000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: .01
Ordinate_Resolution: .01
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Huc4Poly
Entity_Type_Definition: watershed polygons
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of feature in square meters.
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of feature in meters.
Attribute:
Attribute_Label: HUC4DISS_
Attribute_Definition:
Internal feature number from the old 1:100,000 version of the layer, for backward compatibility
Attribute:
Attribute_Label: HUC4DISSID
Attribute_Definition:
User ID number from the old 1:100,000 version of the layer, for backward compatibility
Attribute:
Attribute_Label: FOURCODE
Attribute_Definition:
Eight Digit Hydrologic Unit Subbasin Code, numeric format

A unique 8-digit code from the USGS map series "Hydrologic Unit Maps". The same number was used in every record that pertains to a subbasin that resides within the same 8-digit sub-basin. Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion.

Attribute:
Attribute_Label: HUC
Attribute_Definition: Eight Digit Hydrologic Unit Subbasin Code, text format
Attribute:
Attribute_Label: NAME
Attribute_Definition: Fourth Level Hydrologic Unit Name, with state abbreviation.
Attribute:
Attribute_Label: HUCNAME
Attribute_Definition:
Fourth Level Hydrologic Unit Name

A name for each 4th level hydrologic unit that relates to the major water feature within the polygon or the major water body it contributes to.

Attribute:
Attribute_Label: STATES
Attribute_Definition:
The "States" field includes the 2-digit postal code of all state(s) that the subbasin falls within.
Attribute:
Attribute_Label: HU_8_DS
Attribute_Definition:
Fourth Level Downstream Hydrologic Unit Code

This field was populated with the 8-digit code of the 4th level hydrologic unit that is receiving the majority of the flow from the subbasin. Outlets created by ditching or other artificial drainage were not considered for this field. If a HU flows across international borders, "CANADA" or "MEXICO" was used depending on which country the HU drains into. If an HU is a closed basin, this field was populated with the term "CLOSED BASIN".

Attribute:
Attribute_Label: ACRES
Attribute_Definition:
This is the area of the 4th level unit in acres, including non-contributing areas.
Attribute:
Attribute_Label: NCONTRB_A
Attribute_Definition:
Non-Contributing Area

Drainage areas that do not flow toward the outlet of any hydrologic unit are considered non-contributing. If a non-contributing area is on the boundary between two or more hydrologic units, the non-contributing area is associated with the hydrologic unit adjacent to the low point on the boundary. This attribute should be the total of the non-contributing areas within a hydrologic unit calculated in acres.


Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tom Potter
Contact_Organization: USDA Natural Resources Conservation Service
Contact_Address:
Address_Type: mailing address
Address: 10 E Babcock, Fed Bldg Rm 443
City: Bozeman
State_or_Province: Montana
Postal_Code: 59715
Country: USA
Contact_Voice_Telephone: 406-587-6968
Contact_Electronic_Mail_Address: thomas.potter@mt.usda.gov
Contact_Instructions: please e-mail with data requests.
Resource_Description: Downloadable Data
Distribution_Liability:
The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in Montana. The USDA Natural Resources Conservation Service makes no claims for the data's suitability for other purposes. The USDA Natural Resources Conservation Service should be acknowledged as the data source in products derived from these data. The Montana Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data from the source distributor.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
File_Decompression_Technique: zip
Transfer_Size: 10.033
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://datagateway.nrcs.usda.gov/>
Fees: none

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Montana State Library
Contact_Address:
Address_Type: mailing address
Address: PO Box 201800
City: Helena
State_or_Province: Montana
Postal_Code: 59620-1800
Country: USA
Contact_Voice_Telephone: 406-444-5354
Contact_Electronic_Mail_Address: nris@mt.gov
Resource_Description: Downloadable Data
Distribution_Liability:
No liability is assumed for the correctness or completeness of this database by the NRCS or the Montana State Library Clearinghouse. Users should read the metadata and determine if it is appropriate for their use. No warranty expressed or implied is made by the Montana State Library regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ESRI shapefile
Transfer_Size: 10.033
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://nris.mt.gov/nsdi/nris/shape/subbasin24k.zip>
Network_Resource_Name: <http://nris.mt.gov/gis/mapper>
Network_Resource_Name: <http://nris.mt.gov/gis/bundler>
Fees: none

Metadata_Reference_Information:
Metadata_Date: 20061011
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tom Potter
Contact_Organization: USDA-NRCS
Contact_Address:
Address_Type: mailing address
Address: 10 E Babcock, Fed Bldg Rm 443
City: Bozeman
State_or_Province: MT
Postal_Code: 59715
Country: USA
Contact_Voice_Telephone: 406-587-6968
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.6 on Fri Jan 19 11:09:29 2007