Name: RAVG-Perimeters

Display Field: FIRE_YEAR

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The USDA Forest Service Rapid Assessment of Vegetation Condition after Wildfire (RAVG) program produces geospatial and related data representing post-fire vegetation condition by means of standardized change detection methods based on Landsat or similar multispectral satellite imagery. RAVG data products characterize the impact of disturbance (fire) on vegetation within a fire perimeter, and include estimates of percent change in live basal area (BA), percent change in canopy cover (CC), and the standardized composite burn index (CBI). Standard thematic products include 7-class percent change in basal area (BA-7), 5-class percent change in canopy cover (CC-5), and 4-class CBI (CBI-4). Contingent upon the availability of suitable imagery, RAVG products are prepared for all wildland fires reported within the conterminous United States (CONUS) that include at least 1000 acres of forested National Forest System (NFS) land (500 acres for Regions 8 and 9 as of 2016). Data for individual fires are typically made available within 45 days after fire containment ("initial assessments"). Late-season fires, however, may be deferred until the following spring or summer ("extended assessments"). Annual national mosaics of each thematic product are prepared at the end of the fire season and updated, as needed, when additional fires from the given year are processed. The annual mosaics are available via the Raster Data Warehouse (RDW, see https://apps.fs.usda.gov/arcx/rest/services/RDW_Wildfire). A combined perimeter dataset, including the burn boundaries for all published Forest Service RAVG fires from 2012 to the present, is likewise updated as needed (at least annually).

Copyright Text: USDA Forest Service, Geospatial Technology and Applications Center (GTAC)

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

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

Extent:

XMin: -150.52921435300001
YMin: 29.213452782
XMax: -76.973032024
YMax: 60.729431743
Spatial Reference: 4269  (4269)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: FIRE_YEAR
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
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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
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: true

HasM: true

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• EVENT_ID ( type: esriFieldTypeString, alias: Event (Fire) ID, length: 30 )
• FIRE_NAME ( type: esriFieldTypeString, alias: Fire Name, length: 50 )
• FIRE_YEAR ( type: esriFieldTypeString, alias: Fire Year, length: 4 )
• ACRES ( type: esriFieldTypeDouble, alias: Acres )
• ASMNT_TYPE ( type: esriFieldTypeString, alias: Assessment Type, length: 25 )
• PREIMGYMD ( type: esriFieldTypeString, alias: Pre-fire Image Date (YYYYMMDD), length: 8 )
• POSTIMGYMD ( type: esriFieldTypeString, alias: Post-fire Image Date (YYYYMMDD), length: 8 )
• UPDATE_YMD ( type: esriFieldTypeString, alias: Date Updated (YYYYMMDD), length: 8 )
• SHAPE ( type: esriFieldTypeGeometry, alias: Shape )
• SHAPE.AREA ( type: esriFieldTypeDouble, alias: SHAPE.AREA )
• SHAPE.LEN ( type: esriFieldTypeDouble, alias: SHAPE.LEN )

Relationships:

• RAVG-Metrics (0) -- Related To: RAVG-Metrics (1)

Supported Operations:   Query   Query Attachments   Query Analytic   Query Related Records   Generate Renderer   Return Updates

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