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Service Description: This map depicts the Strahler stream order classification system across the State of Alaska. Strahler stream order is a river classification system that assigns a hierarchical number to a given reach of a waterway based on its branching network of tributaries. The assigned Strahler stream order number corresponds to the amount and Strahler numbers of upstream tributaries that contribute to a given portion of the waterway. In this way Strahler stream order numbers assist in classifying and understanding characteristics along the course of a watershed. This dataset was created using the 2018 National Hydrography Dataset and RivEX version 1.14 within ArcGIS Pro. Where appropriate the Canada1Water hydrologic model was used to classify transboundary watercourses. Areas of that have been determined to be pre-statehood land withdrawals are excluded from the current version of this dataset. Canada1Water Southeast AK data derived from: https://open.canada.ca/data/en/dataset/1c0e8a4e-952c-cd7a-1be8-29691aea2cd1

Map Name: StreamOrder

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Layers:

• Canada1Water Southeast AK (0)
• Kuskokwim, Bristol Bay Aleutian Islands (3)
• Northwest Arctic (4)
• Southcentral AK (2)
• Southeast AK (1)
• Yukon Drainage (5)

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Service Item Id: 0c99c6bcf5354d4baba0585be8182725

Copyright Text:

Spatial Reference: 102006  (3338)  LatestVCSWkid(0)


Single Fused Map Cache: false

Initial Extent:

XMin: -1090487.48655019
YMin: 140581.02087266324
XMax: 1236792.1680091196
YMax: 2686936.113582849
Spatial Reference: 102006  (3338)  LatestVCSWkid(0)

Full Extent:

XMin: -2157227.138800001
YMin: 416938.03270000033
XMax: 1578611.2224000003
YMax: 2154905.9047
Spatial Reference: 102006  (3338)  LatestVCSWkid(0)

Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

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Title: Map
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Keywords: StreamOrder,MapServer
AntialiasingMode: Fast
TextAntialiasingMode: Force

Supports Dynamic Layers: true

Resampling: false

MaxRecordCount: 1000000

MaxSelectionCount: 2000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON, PBF

Supports Query Data Elements: true

Min Scale: 13000000

Max Scale: 0

Supports Datum Transformation: true



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