Parent Layer: HUC8 Alteration Assessments

Name: HUC 8 Dam Density

Display Field: SUBBASIN

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This layer is comprised of U.S.G.S. sub-basins categorized based on the density of dams within the sub-basin (dams/mile²) into 'Low', 'Medium-Low', 'Medium-High', and 'High' categories. For more information about how dam density was calculated, see our <a href='methods/Dam_Density_methods.pdf' target='_blank'><b>Methods</b><a> <font color ="black"> page. </font> <img src="img/Dam_Density_thumb.png"> <a href='img/Dam_Density.jpg' target='_blank'><b>View larger image</b><a>

Copyright Text:

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -1.06355863865E7
YMin: 3357106.8816
XMax: -9880534.1653
YMax: 4067841.7837999985
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: dam_rnk
Field 2: null
Field 3: null
Field Delimiter: ,
Default Symbol:
N/A
Default Label: null
UniqueValueInfos:
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  Outline:
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• Value: 4
  Label: Low
  Description:
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  Color: [76, 230, 0, 255]
  Outline:
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• Value: 3
  Label: Medium Low
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• Value: 2
  Label: Medium High
  Description:
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• Value: 1
  Label: High
  Description:
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Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
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: OBJECTID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• SUBBASIN ( type: esriFieldTypeString, alias: SUBBASIN, length: 49 )
• BASIN ( type: esriFieldTypeString, alias: BASIN, length: 36 )
• SUBREGION ( type: esriFieldTypeString, alias: SUBREGION, length: 51 )
• REGION ( type: esriFieldTypeString, alias: REGION, length: 26 )
• HUC_8 ( type: esriFieldTypeString, alias: 8 Digit HUC code, length: 8 )
• ACRES ( type: esriFieldTypeDouble, alias: ACRES )
• SQ_MILES ( type: esriFieldTypeDouble, alias: Square Miles )
• DamNum ( type: esriFieldTypeDouble, alias: # Dams )
• Dm_100SQmi ( type: esriFieldTypeSingle, alias: Dams/100 mi2 )
• DamStorIdx ( type: esriFieldTypeSingle, alias: Dam Storage (mean depth ft) )
• canal_idx ( type: esriFieldTypeSingle, alias: Canal Ratio (length) )
• chan_idx ( type: esriFieldTypeSingle, alias: Channelization % (length) )
• ResX100 ( type: esriFieldTypeSingle, alias: Reservoir % (area x 100) )
• VEG_idx ( type: esriFieldTypeSingle, alias: Vegetative Cover % (area) )
• Prot_idx ( type: esriFieldTypeSingle, alias: Protected Land % (area) )

Supported Operations:   Query   Generate Renderer   Return Updates

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