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Layer: Excess Bismuth 214 Contours (ID: 3)

Name: Excess Bismuth 214 Contours

Display Field: NAME

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: This layer provides iso-contours of excess Bismuth 214 in counts per second based upon the 1764keV photopeak. Excess Bismuth 214 is based upon measured minus expected Bismuth 214 times a per flight determined constant equal to a ratio of statistically most likely values. Forty one (41) aerial radiological surveys of potential uranium mining areas (1,144 square miles) were conducted within the Navajo Nation during the period from October 1994 through October 1999. The US Environmental Protection Agency (USEPA) Region 9 funded the surveys and the US Department of Energy (USDOE) Remote Sensing Laboratory (RSL) in Las Vegas, Nevada conducted the aerial surveys. The aerial survey data were used to characterize the overall radioactivity (ground surface exposure rate) and excess Bismuth 214 levels within the surveyed areas. Full metadata can be found at

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Default Visibility: true

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: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Drawing Info: Advanced Query Capabilities:
HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Supported Operations:   Query   Generate Renderer   Return Updates

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