Name: CircumArctic_Permafrost_ExtentD2_gen10_4

Display Field: EXTENT

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Circum-Arctic Map of Permafrost and Ground Ice Conditions, Version 2, National Snow and Ice Data Center Data and summary from http://nsidc.org/data/docs/fgdc/ggd318_map_circumarctic/index.html The circumpolar permafrost and ground ice data contribute to a unified international data set that depicts the distribution and properties of permafrost and ground ice in the Northern Hemisphere (20°N to 90°N). The re-gridded data set shows discontinuous, sporadic, or isolated permafrost boundaries. Permafrost extent is estimated in percent area (90-100%, 50-90%, 10-50%, less than 10%, and no permafrost). Relative abundance of ground ice in the upper 20 m is estimated in percent volume (greater than 20%, 10-20%, less than 10%, and 0%). The data set also contains the location of subsea and relict permafrost. the gridded data are gridded at 12.5 km, 25 km, and 0.5 degree resolution. The shapefiles were derived from the original 1:10,000,000 paper map (Brown et al. 1997) Permafrost, or permanently frozen ground, is ground (soil, sediment, or rock) that remains at or below 0°C for at least two years (Permafrost Subcommittee, 1988). It occurs both on land and beneath offshore arctic continental shelves, and underlies about 22% of the Earth's land surface. For more information on the creation of the original map, see Heginbottom et al. (1993). The original paper map also includes information on the relative abundance of ice wedges, massive ice bodies and Pingos, ranges of permafrost temperature and thickness (Brown et al. 1997). This layer is derived from the CircumArctic_Permafrost layer by removing codes 22 - 25 and dissolving by Permafrost Extent, and then generalized.

Copyright Text: Circum-Arctic Map of Permafrost and Ground Ice Conditions, Version 2, National Snow and Ice Data Center

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 4000

Supported query Formats: JSON

Use Standardized Queries: True

Extent:

XMin: -20037507.0671618
YMin: 3177199.21500135
XMax: 20037507.0671618
YMax: 18417594.4447545
Spatial Reference: 102100 (3857)

Drawing Info:

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Has Attachments: false

Has Geometry Properties: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Name : OBJECTID

IsSystemMaintained : True

Global ID Field:

Type ID Field: EXTENT_DESC

Fields:

• OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
• EXTENT (type: esriFieldTypeString, alias: Permafrost extent code, SQL Type: sqlTypeOther, length: 4, nullable: false, editable: true)
• EXTENT_DESC (type: esriFieldTypeString, alias: Permafrost extent, SQL Type: sqlTypeOther, length: 30, nullable: false, editable: true)

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Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 3/11/2022 7:47:09 PM

Schema Last Edit Date: 3/11/2022 7:47:09 PM

Data Last Edit Date: 3/11/2022 7:47:09 PM

Supported Operations:   Query   Query Top Features   Query Analytic   Query Bins   Generate Renderer   Validate SQL   Get Estimates