Identification Information
    Citation
        Originator: USDA Forest Service, Geospatial Technology and Applications Center, BAER Imagery Support Program
        Publication Date: 2017-10-12
        Title: Burned Area Reflectance Classification (BARC) Data Bundle for the SCORPION Fire occurring on the Willamette NF - 2017
        Publication Information
            Publication Place: Salt Lake City, Utah, USA
            Publisher: USDA Forest Service
        Geospatial Data Presentation Form: raster digital data
    Description
        Abstract: These data products are preliminary burn severity assessments derived from Sentinel 2 data. The pre-fire and post-fire subsets included were used to create a differenced Normalized Burn Ratio (dNBR) image. The dNBR image attempts to portray the variation of burn severity within a fire. The severity ratings are influenced by the effects to the canopy.  The severity rating is based upon a composite of the severity to the understory (grass, shrub layers), midstory trees and overstory trees. Because there is often a strong correlation between canopy consumption and soil effects, this algorithm works in many cases for BAER teams whose objective is a soil burn severity assessment.  It is not, however, appropriate in all ecosystems or fires. It is expected that BAER teams will adjust the thresholds to match field observations to produce a soil burn severity.
        Purpose: These data were created by the USDA Forest Service Geospatial Technology and Applications Center (GTAC) to support Burned Area Emergency Response (BAER) teams.    


NOTES: None.

Product List
	or4478412203020170828_20160816_20171010_burn_bndy.shp
    		Event perimeter modified from the downloaded GeoMAC perimeter.
	or4478412203020170828_20160816_20171010_dnbr_barc256.tif: 
    		BARC256, 256-class (0-255); continuous image representing preliminary estimate of burn severity. This dataset can be adjusted by the user, if needed, to refine the thematic BARC4 product and/or define a new BARC4. It is anticipated that users will adjust the breakpoints between classes, then recode to their desired 3 or 4 classes.
	or4478412203020170828_20160816_20171010_dnbr_barc4.tif: 
    		BARC4,  Four category preliminary estimate severity classification.
	or4478412203020170828_20160816_20171010_dnbr.tif: 
    		Continuous dNBR product scaled by 1000; theoretical range of values is -2000 to 2000
	or4478412203020170828_20160816_s2_refl.tif: 
   		Pre-Fire Sentinel 2 reflectance at sensor data subset (08/16/2016),  band order (1-3): SWIR, NIR, Red (Sentinel 2 bands 12, 8a, 5). 
	or4478412203020170828_20171010_s2_refl.tif: 
    		Post-Fire Sentinel 2 reflectance at sensor data subset (10/10/2017),  band order (1-3): SWIR, NIR, Red (Sentinel 2 bands 12, 8a, 5).

BARC256 Thresholds:
	0-100 Unburned
	100-134 Low
	134-212 Moderate
	212-255 High

All files are projected in UTM Zone 10N, WGS84

Contact: 
    	Justin Epting
    	jepting@fs.fed.us
    	(801) 975-3755   

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The following section should be completed after the BARC has been field validated by the BAER team and this entire metadata file should be returned to GTAC with the Soil Burn Severity data.
    
    BAER Assessment Completion Date: 10/23/2017
    BAER Team GIS Analyst: Dorothy Thomas
    BAER Team Leader: Rob Tanner/ Peggy Fisher
    Soil Burn Severity Analyst(s): Lizandra Nieves-Rivera, Lynn Khuat, Dorothy Thomas
    
    Original BARC256 thresholds:
        Unburned / Undetectable: <=100
        Low: >100 and <=134
        Moderate: >134 and <=192
        No data > 193
        
    Soil Burn Severity thresholds:
        Unburned / Undetectable: <=100
        Low: >100 and <=142
        Moderate: >142 and <=192
        No data > 193
        
    Sequence of steps used to create Soil Burn Severity data:
1) Adjusted thresholds as described above
2) Majority Filter (4 times) to eliminate single pixel differences
3) Burn in polygon differences, not captured in threshold adjustments
4) Reproject to Oregon Washington Albers
    
    Additional Comments:
Ground field reconnaissance of the fires and soil burn severity shows that overall (all fires) the vegetation fire intensity was higher than the soil burn severity. 
This resulted in a reduction of high and moderate areas, changes the thresholds for these ranges within the BARC. Another factor that precluded the reduction of 
high, moderate areas was the level of rock outcrops, highly colluvial and ridge sections that show a higher intensity in vegetation and which are none or shallow 
soil profiles precluding the reduction of those areas. Some areas within the Whitewater river shows green canopy which was pick up by the BARC as unburned but due 
to back burning (tidying up) activities these sections were low soil burn severity and those areas were mostly burn with polygons. 

Field Recon points, geotagged photos, and layerfile included in zip file.