Name: 8 Digit Watersheds

Display Field: mde8name

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This file (SWSUB8) is a statewide digital watershed file. It depicts the State with 138 separate watersheds each with an 8-digit numeric code. The file was created primarily for State and Federal agency use. The creation of this file goes back many years and involved several State and Federal agencies. This file was derived from a more detailed watershed file (Maryland's Third-Order Watershed). The process used to create this file is consistent with the elevation contour information found on the US Geological Survey's 7.5 minute topographic quadrangle maps and the Maryland Department of the Environment's watershed location and naming conventions. This file is similar, but not identical, to the US Natural Resources Conservation Service's (NRCS) Hydrologic Unit Code (HUC11) watershed file. The watersheds define Strahler (Strahler 1952 p.1120) third order stream drainage by contours on U.S. Geological Survey (USGS) 7.5 minute quadrangle map sheets. Some watershed drainage areas were defined for streams less than third order and some large area Watersheds were split to maintain a maximum size of 15,000 acres.

Copyright Text: MD iMAP, DNR

Default Visibility: true

MaxRecordCount: 1400

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

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Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -8848485.2893
YMin: 4564041.8401999995
XMax: -8348286.501700001
YMax: 4825770.740699999
Spatial Reference: 102100  (3857)

Drawing Info:

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Labeling Info:

Advanced Query Capabilities:

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Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: GIS Object ID )
• mde6digt ( type: esriFieldTypeString, alias: MDE 6 Digit Watershed Number, length: 6 )
• mde6name ( type: esriFieldTypeString, alias: MDE 6 Digit Watershed Name, length: 30 )
• mde8digt ( type: esriFieldTypeString, alias: MDE 8 Digit Watershed Number, length: 8 )
• mde8name ( type: esriFieldTypeString, alias: MDE 8 Digit Watershed Name, length: 25 )
• Shape ( type: esriFieldTypeGeometry, alias: GIS Shape )
• cbi ( type: esriFieldTypeDouble, alias: Combined Index of Biotic Integrity )
• Shape.STArea() ( type: esriFieldTypeDouble, alias: Shape.STArea() )
• Shape.STLength() ( type: esriFieldTypeDouble, alias: Shape.STLength() )

Supported Operations:   Query   Generate Renderer   Return Updates

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