Ecological Drainage Units

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: The Nature Conservancy (TNC) Eastern Conservation Science

Originator: The Nature Conservancy (TNC) Freshwater Initiative Program

Publication_Date: 2005

Title: Ecological Drainage Units

Geospatial_Data_Presentation_Form: vector digital data

Other_Citation_Details: Copyright © 2005 The Nature Conservancy. All rights reserved.

Online_Linkage: <http://conserveonline.org/workspaces/ecs/napaj/nap>

Description:

Abstract:

Ecological Drainage Units (EDUs) group watersheds that share a common zoogeographic history, physiographic and climatic characteristics, and therefore likely have a distinct set of freshwater assemblages and habitats. EDUs are hypothesized to account for the variability within fish zoogeographic sub-regions due to finer-scale drainage basin boundaries and physiography. EDUs are delineated as groups of 8-digit US Geological Survey Hydrologic Unit watersheds. EDUS were qualitatively defined by the TNC Freshwater Initiative using primarily USFS Fish Zoogeographic Subregions, USFS Ecoregions and Subsections, and major drainage divisions.

Purpose:

EDUs provide ecologically meaningful units within which conservation areas can be selected to ensure that conservation elements (species as well as coarse filter systems or community units) are represented across key environmental gradients. This type of regional stratification is critical in conservation planning, the hypothesis being that genetic and ecological variability occurs within species, communities and ecosystems across their spatial and environmental ranges.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2001

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -87.650470

East_Bounding_Coordinate: -63.317692

North_Bounding_Coordinate: 49.422485

South_Bounding_Coordinate: 35.772097

Keywords:

Theme:

Theme_Keyword: Ecological Drainage Units

Theme_Keyword: Watersheds

Place:

Place_Keyword: Northeast U.S.

Place_Keyword: Northeast Canada

Use_Constraints:

The Nature Conservancy (TNC) created this data set from the manipulation, analysis, and/or synthesis of publicly available data sources. TNC allows copying and distribution of this data set. Commercial use of this data set is prohibited. This data set must be cited on all electronic and hard copy products using the language of the Data Set Credit.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

The Nature Conservancy, Eastern Conservation Science Support Program

Contact_Address:

Address: 11 Avenue de Lafayette, 5th Floor

City: Boston

State_or_Province: MA

Postal_Code: 02111-1736

Country: USA

Contact_Electronic_Mail_Address: ecs-ecoplans@tnc.org

Hours_of_Service: 9am-5pm

Data_Set_Credit:

The Nature Conservancy (TNC) Eastern Conservation Science, 2005. The Nature Conservancy (TNC) Freshwater Initiative, 2005.

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.0.1324

Data_Quality_Information:

Lineage:

Source_Information:

Source_Scale_Denominator: 250,000

Type_of_Source_Media: CD-ROM

Source_Citation_Abbreviation: United States Geological Survey

Source_Contribution:

Hydrologic units maps of the Conterminous United States. ~1:250,000 USGS 1994. The HUC data produced by GIRAS was originally collected at a scale of 1:250K. Some areas, notably major cities in the west, were recompiled at a scale of 1:100K

Source_Information:

Source_Scale_Denominator: 2,000,000

Type_of_Source_Media: download

Source_Citation_Abbreviation: Canada Watersheds Maps (Sub-Sub Drainage Basins).

Source_Contribution:

The Canada Watersheds Maps (Sub-Sub Drainage Basins) depicts primary, secondary and tertiary drainage basins across Canada. GeoGratis Client Services. GeoAccess Division, Canada Centre for Remote Sensing, Natural Resources Canada

Process_Step:

Process_Description:

The source 8 digit HUC boundaries are from the Hydrologic units maps of the Conterminous United States, USGS 1994 or The Canada Watersheds Maps (Sub-Sub Drainage Basins) depicts primary, secondary and tertiary drainage basins across Canada 1977. The watersheds were dissolved on their EDU2001 attribute to create these EDU boundaries.

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: I:\Ecoregions\LNE\Spatial_Data\vector\edu2001.shp.xml

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation:

I:\Ecoregions\Final_Plan_CDs\STL_cd\STL_20031028v23\cd_files\spatial\vector\edu.shp.xml

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: 71

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Albers Conical Equal Area

Albers_Conical_Equal_Area:

Standard_Parallel: 43.000000

Standard_Parallel: 46.000000

Longitude_of_Central_Meridian: -72.000000

Latitude_of_Projection_Origin: 42.000000

False_Easting: 0.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000000

Ordinate_Resolution: 0.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.400000

Denominator_of_Flattening_Ratio: 294.978698

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: edu

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: AREA

Attribute_Definition: area of EDU in sq.meters

Attribute:

Attribute_Label: PERIMETER

Attribute_Definition: perimeter in meters

Attribute:

Attribute_Label: EDU_2001

Attribute_Definition: EDU abbreviation/short code

Attribute:

Attribute_Label: EDULABEL

Attribute_Definition: EDU name

Attribute:

Attribute_Label: FWECO

Attribute_Definition: WWF freshwater ecoregion of the EDU

Distribution_Information:

Resource_Description: Downloadable Data

Distribution_Liability:

Neither The Nature Conservancy nor any of the ecoregional planning team participants makes any warranty, expressed or implied, as to the use or appropriateness of use of the enclosed data., nor are there warranties of merchantability or fitness for a particular purpose or use. No representation is made as to the currency, accuracy or completeness of the information on this CD-ROM or of the data sources on which it is based. Neither The Nature Conservancy nor any of the ecoregional planning team participants shall be liable for any lost profits or consequential damages, or claims against the user by third parties.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 2.843

Metadata_Reference_Information:

Metadata_Date: 20070828

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

The Nature Conservancy, Eastern Conservation Science Support Program

Contact_Address:

Address_Type: mailing and physical address

Address: 11 Avenue de Lafayette, 5th Floor

City: Boston

State_or_Province: MA

Postal_Code: 02111-1736

Country: USA

Contact_Electronic_Mail_Address: ecs-ecoplans@tnc.org

Hours_of_Service: 9am-5pm

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