WQ_IBM_Landcover_Basins1986

Metadata:

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

Identification_Information:

Citation:

Citation_Information:

Originator: Original GIS project completed by Sanborn Mapping Solutions

Originator: Ed O'Brien, Dept. of Ecology

Title: WQ_IBM_Landcover_Basins1986

Geospatial_Data_Presentation_Form: vector digital data

Other_Citation_Details:

The map depicting basins that qualify for a lower flow control standard was produced by Ed O'Brien of the Water Quality Program of the Department of Ecology. The "Western Washington Land Cover Change Analysis" report and GIS products available were produced by Maria Fiorella, of Sanborn Mapping Solutions.

Description:

Abstract:

The shapefile displays those basins within which development projects qualify for using the existing land cover condition as the stormwater flow control default target. This is a lower flow control default target than the target used for most of western Washington, which is based upon use of the historic land cover condition.

Purpose:

The Western Washington Stormwater Mangement Manual allows local governments to adopt a flow control standard that requires land development projects to match high flow durations that are produced by the existing land cover condition. As pre-requisite to allowing that standard, the manual recommends that the drainage area of the immediate stream and all subsequent downstream basins must have had at least 40% total impervious area since 1985. To help implement this option, the Department of Ecology has produced a map that displays the basins in western Washington within which development projects qualify for this lower flow control standard.

Supplemental_Information:

The state of the data set: The Department of Ecology contracted with NOAA Coastal Services Center to interpret satellite images for purposes of providing impervious area data for western Washington for 1986. In regard to the underlying data set for the map, the Department does not have any plans to make alterations to the existing data. The Department also has not made any commitments to update the land cover analysis to represent a more recent land cover condition. Time Period for which the data is relevant: The production of the map relied on interpretation of satellite images taken between 20020819 and 20020906.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19860101

Currentness_Reference: ground condition

Status:

Progress: In work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.574229

East_Bounding_Coordinate: -122.025607

North_Bounding_Coordinate: 48.020443

South_Bounding_Coordinate: 47.176335

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: flow

Theme_Keyword: stormwater

Theme_Keyword: landcover

Theme_Keyword: basin

Theme_Keyword: control

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: northwest

Place_Keyword: Washington

Access_Constraints: No access constraints exist at this time.

Use_Constraints: No use constraints exist at this time.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Department of Ecology - Water Quality Program

Contact_Person: Ed O'Brien

Contact_Address:

Address_Type: mailing

Address: PO Box 47600

City: Olympia

State_or_Province: Washington

Postal_Code: 98504-7600

Country: US

Contact_Voice_Telephone: 360-407-6438

Contact_Facsimile_Telephone: 360-407-6426

Contact_Electronic_Mail_Address: [email protected]

Hours_of_Service: M-F 8am-5pm

Native_Data_Set_Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270

Data_Quality_Information:

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Sanborn Mapping Solutions - Maria Fiorella

Title: Land cover Change Analysis

Other_Citation_Details:

The "Western Washington Land Cover Change Analysis" report and GIS products available were produced by Maria Fiorella, of Sanborn Mapping Solutions.

Type_of_Source_Media: CD-ROM

Source_Citation_Abbreviation: Land cover Change Analysis

Process_Step:

Process_Description:

Ecology contracted with NOAA Coastal Services Center to provide 1986 impervious area land cover data for western Washington for 1986. Ecology used the 1986 total impervious area estimates by basin from NOAA to determine which areas qualify for use of the existing land cover condition as the flow control target for new and redevelopment projects. For the Basins_1986 Criterion.shp file, we computed an area weighted average by basin based upon Shape_Area and Imp_1986. If weighted average >40%, then use existing land cover; If weighted average < 40% TIA, basin does not qualify for less stringent flow control standard.

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Washington State Department of Ecology

Contact_Person: Ed O'Brien

Contact_Address:

Address_Type: mailing and physical

Address: PO Box 47600

City: Olympia

State_or_Province: WA

Postal_Code: 98504-7600

Country: US

Contact_Voice_Telephone: 360.407.6438

Contact_Facsimile_Telephone: 360.407.6426

Contact_Electronic_Mail_Address: [email protected]

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Point_and_Vector_Object_Count: 145

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: NAD 1983 HARN StatePlane Washington South FIPS 4602 Feet

Lambert_Conformal_Conic:

Standard_Parallel: 45.83333333333334

Standard_Parallel: 47.33333333333334

Longitude_of_Central_Meridian: -120.5

Latitude_of_Projection_Origin: 45.33333333333334

False_Easting: 1640416.666666667

False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.00032808333333333333

Ordinate_Resolution: 0.00032808333333333333

Planar_Distance_Units: foot_us

Geodetic_Model:

Horizontal_Datum_Name: D North American 1983 HARN

Ellipsoid_Name: GRS 1980

Semi-major_Axis: 6378137.0

Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: WQ_IBM_Landcover_Basins1986

Attribute:

Attribute_Label: Shape_Length

Attribute_Definition: Length of feature in internal units.

Attribute_Definition_Source: Esri

Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Attribute:

Attribute_Label: Shape_Area

Attribute_Definition: Area of feature in internal units squared.

Attribute_Definition_Source: Esri

Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Attribute:

Attribute_Label: CANCH01_06

Attribute_Definition: Canoy change 2001-2006

Attribute_Definition_Source: Esri

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: BASIN_NAME

Attribute:

Attribute_Label: ImpCh01_96

Attribute_Definition: Change in total impervious 2001-1996

Attribute:

Attribute_Label: ImpCh96_91

Attribute_Definition: Change in total impervious 1996-1991

Attribute:

Attribute_Label: WATERSHED

Attribute:

Attribute_Label: WRIA_NO

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: CanCh01_91

Attribute_Definition: Canoy change 2001-1991

Attribute:

Attribute_Label: CanCh96_91

Attribute_Definition: Canoy change 1996-1991

Attribute:

Attribute_Label: CanCh01_96

Attribute_Definition: Canoy change 2001-1996

Attribute:

Attribute_Label: IMP_2006

Attribute_Definition: impervious 2006

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: IMP_1986

Attribute_Definition: impervious 1986

Attribute:

Attribute_Label: Can_1991

Attribute_Definition: Canopy coverage 1991

Attribute:

Attribute_Label: Imp_1991

Attribute_Definition: Impervious surface area 1991

Attribute:

Attribute_Label: Can_2001

Attribute_Definition: Canopy coverage 2001

Attribute:

Attribute_Label: Imp_2001

Attribute_Definition: Impervious surface area - 2001

Attribute:

Attribute_Label: Imp_1996

Attribute_Definition: Impervious surface area 1996

Attribute:

Attribute_Label: County

Attribute:

Attribute_Label: OBJECTID_1

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: CSO

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: ImpCh01_91

Attribute_Definition: Change in total impervious 2001-1991

Attribute:

Attribute_Label: MDA_06_Can

Attribute:

Attribute_Label: MDA_01_Can

Attribute:

Attribute_Label: IMPCH01_86

Attribute_Definition: impervious change 2001-1986

Attribute:

Attribute_Label: IMPCH01_06

Attribute_Definition: impervious change 2001-2006

Attribute:

Attribute_Label: IMPCH06_86

Attribute_Definition: impervious change 2006-1986

Attribute:

Attribute_Label: COUNTY

Attribute:

Attribute_Label: SUB_BASIN

Attribute:

Attribute_Label: CATCHMENT

Attribute:

Attribute_Label: Can_1996

Attribute_Definition: Canopy coverage 1996

Attribute_Definition_Source: Esri

Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Metadata_Reference_Information:

Metadata_Date: 20191217

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Washington State Department of Ecology

Contact_Person: Ed O'Brien

Contact_Address:

Address_Type: mailing

Address: PO Box 47600

City: Olympia

State_or_Province: WA

Postal_Code: 98504-7600

Country: US

Contact_Voice_Telephone: 360.407.6438

Contact_Facsimile_Telephone: 360.407.6426

Contact_Electronic_Mail_Address: [email protected]

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Access_Constraints: No access constraints at this time.

Metadata_Use_Constraints: No use constraints at this time.