20230224
08581400
1.0
FALSE
GISRASTER.AK_VolatileFuelPrevalence_SRS
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ArcSDE Connection
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Linear Unit: Meter (1.000000)
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20230228
09333700
20230228
9350900
20000000
50000
dataset
external
ba2e03b58ee7e358c8def9d053470484f0d0c979
U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
GIS Specialist
P.O. Box 35005
Fort Wainwright
AK
99703
blm_ak_afs_gis@blm.gov
US
Contact by email.
Organization: U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
Position: GIS Specialist
Role: Distributor
True
Organization: U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
Position: GIS Specialist
Role: Unknown
20230224
Enterprise Geodatabase Raster Dataset
external
ba2e03b58ee7e358c8def9d053470484f0d0c979
U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
GIS Specialist
P.O. Box 35005
Fort Wainwright
AK
99703
blm_ak_afs_gis@blm.gov
US
Contact by email.
Organization: U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
Position: GIS Specialist
Role: Distributor
True
Organization: U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
Position: GIS Specialist
Role: Unknown
https://fire.ak.blm.gov/arcgis/rest/services/ImageServices
BLM-STATE
Alaska
BLM-THEME
Fire
Management
NONE
landscape modeling
wildfire risk assessment
wildland fire
Microsoft Windows 10 Version 10.0 (Build 19045) ; Esri ArcGIS 12.9.4.32739
Bureau of Land Management
U.S. Department of the Interior, Bureau of Land Management (BLM)
AK_VolatileFuelPrevalence_SRS
raster digital data
20230203
20230203
20230203
This work is based on similar work completed by J. Beverly, J. Schmidt, R. Ziel, and C. Moore.
U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
GIS Specialist
P.O. Box 35005
Fort Wainwright
AK
99703
US
blm_ak_afs_gis@blm.gov
Contact by email.
Organization: Bureau of Land Management (BLM), Alaska Fire Service (AFS)
Position: GIS Specialist
Role: Unknown
Organization: Bureau of Land Management (BLM), Alaska Fire Service (AFS)
Position: GIS Specialist
Role: Unknown
1
-173.625094
-117.378879
71.407024
53.988773
20221231
These data represent prevalence (i.e., relative abundance and proximity) of volatile fuel types (primarily conifers) capable of producing embers that could start fires. Water/ice pixels from the original input landcover raster are retained in volatile fuel prevalence rasters. The intent of the water/ice "patch" is to make the dataset easier for users to interpret these data and to distinguish areas unlikely to burn (e.g., sparse vegetation) from those that will not burn (e.g., water).
These data are an additional tool to use in risk assessments. Short Range Spotting data are useful for planning targeted fuel treatments. They do not replace models that simulate fire movement and behavior.
These data represent prevalence (i.e., relative abundance and proximity) of volatile fuel types (primarily conifers) capable of producing embers that could start fires. Water/ice pixels from the original input landcover raster are retained in volatile fuel prevalence rasters. The intent of the water/ice "patch" is to make the dataset easier for users to interpret these data and to distinguish areas unlikely to burn (e.g., sparse vegetation) from those that will not burn (e.g., water).
These data are an additional tool to use in risk assessments. Short Range Spotting data are useful for planning targeted fuel treatments. They do not replace models that simulate fire movement and behavior.
Prevalence values fall into 6 categories:
1 = Very Low prevalence of hazardous/highly flammable vegetation in the surrounding area
2 = Low prevalence of hazardous/highly flammable vegetation in the surrounding area
3 = Moderate prevalence of hazardous/highly flammable vegetation in the surrounding area.
4 = High prevalence of hazardous/highly flammable vegetation in the surrounding area.
5 = Maximum (surrounded) prevalence of hazardous/highly flammable vegetation in the surrounding area.
10 = Identifies water/ice, derived from in the original landcover dataset.
U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
Alaska
biota
environment
Fire
landscape modeling
Management
planningCadastre
wildfire risk assessment
wildland fire
These data are provided by Bureau of Land Management (BLM) 'as is' and might contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. The information contained in these data is dynamic and may change over time. The data are not better than the sources from which they were derived, and both scale and accuracy may vary across the data set. These data might not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office from which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This data may be updated by the BLM without notification.
The BLM assumes no responsibility for errors or omissions. No warranty is made by the BLM as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data; nor shall the act of distribution to contractors, partners, or beyond, constitute any such warranty for individual or aggregate data use with other data. Although these data have been processed successfully on computers of BLM, no warranty, expressed or implied, is made by BLM regarding the use of these data on any other system, or for general or scientific purposes, nor does the fact of distribution constitute or imply any such warranty. In no event shall the BLM have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of the use or reliance on the geographic data or arising out of the delivery, installation, operation, or support by BLM.
None, these data are considered public domain.
external
ba2e03b58ee7e358c8def9d053470484f0d0c979
U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
GIS Specialist
P.O. Box 35005
Fort Wainwright
AK
99703
blm_ak_afs_gis@blm.gov
US
Contact by email.
Organization: U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
Position: GIS Specialist
Role: Distributor
True
Organization: U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
Position: GIS Specialist
Role: Unknown
Last metadata review date: 20230224
These data are provided by Bureau of Land Management (BLM) 'as is' and might contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. The information contained in these data is dynamic and may change over time. The data are not better than the sources from which they were derived, and both scale and accuracy may vary across the data set. These data might not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office from which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This data may be updated by the BLM without notification.
None, these data are considered public domain.
Unknown. There are likely errors in the input data and those errors will be reflected in this dataset.
Unknown. There are likely errors in the input data and those errors will be reflected in this dataset.
These data do not cover all of Alaska . They coincide with the boundaries of the Alaska Predictive Services Areas.
Unknown. There are likely errors in the input data and those errors will be reflected in this dataset.
LANDFIRE 2020 Existing Vegetation Type (EVT) AK. LA20_EVT_220.
BLM AFS Alaska Statewide Fire History Perimeters 1940-2022 Polygon
LANDFIRE Existing Vegetation Type (EVT) raster data was used as the input landcover rater. The EVT raster to clipped to coincide with the boundaries of the Alaska Predictive Service Areas. We found that fire scars from 2017-2022 were missing from the landcover raster. The missing fire scars were converted to rasters and mosaiced into the original landcover raster to produce and updated landcover dataset. The updated landcover dataset was reclassified based on generalized vegetation type and hazard rating. Generalized types and hazard ratings are presented below. The format is: Generalized type Name (100m reclass value | 500 m reclass value)
Evergreen Forest ( 100 | 100 )
Low-Tall Shrub/Herbaceous/Deciduous Forest ( 30 | 6 )
Mixed Forest ( 75 | 75 )
Sparsely Vegetated/Barren ( 0 | 0 )
Tussock Tundra ( 50 | 20 )
Water/Ice ( 0 | 0 )
Woodland (100 | 100 )
Fire scar, 1-3 years old ( 0 | 0 )
Fire scar, 4+ years old ( 30 | 6 )
Reclassification resulted in two new rasters (reclass100m, reclass500m).
Prevalence of volatile fuels was calculated using focal statistics and raster calculator tools.
For short range spotting (reclass100m), we used a circular neighborhood with a 3-cell radius to sum the surrounding cells. Prevalence of volatile fuels was calculated using raster calculator to divide cell values by 29 and return an integer. For long range spotting (reclass500m), we used a circular neighborhood with a 16-cell radius to sum the surrounding cells. Prevalence of volatile fuels was calculated using raster calculator to divide cell values by 797 and return an integer. Water/ice pixels from the original input landcover raster reclassified to 101 and mosaiced into the long range and short-range spotting exposure rasters. The intent of the water/ice patch is to make the dataset easier for users to interpret and to distinguish areas unlikely to burn (e.g., sparse vegetation) from those that will not burn (e.g., water).
After the water/ice pixels were added , the rasters were reclassified a second time.
Prevalence values were reclassified as follows:
Values between 0 and 19 were reclassified to 1 (Very Low).
Values between 20 and 39 were reclassified to 2 (Low).
Values between 40 and 59 were reclassified to 3 (Moderate).
Values between 60 and 79 were reclassified to 4 (High).
Values between 80 and 100 were reclassified to 5 (Maximum).
Values of 101 were reclassified to 10 (Water/Ice).
20230203
external
ba2e03b58ee7e358c8def9d053470484f0d0c979
U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
GIS Specialist
P.O. Box 35005
Fort Wainwright
AK
99703
blm_ak_afs_gis@blm.gov
US
Contact by email.
Organization: U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
Position: GIS Specialist
Role: Distributor
True
Organization: U.S. Department of the Interior, Bureau of Land Management (BLM), Alaska Fire Service
Position: GIS Specialist
Role: Unknown
EPSG
6.18.3(9.3.1.2)
GISRASTER.SDE_VAT_889
Table
6
AK volatile fuel (conifer) prevalence, long range spotting values and description.
AFS
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Value
Value
Integer
4
0
0
Prevalence values fall into 6 categories:
1 = Very Low prevalence of hazardous/highly flammable vegetation in the surrounding area
2 = Low prevalence of hazardous/highly flammable vegetation in the surrounding area
3 = Moderate prevalence of hazardous/highly flammable vegetation in the surrounding area.
4 = High prevalence of hazardous/highly flammable vegetation in the surrounding area.
5 = Maximum (surrounded) prevalence of hazardous/highly flammable vegetation in the surrounding area.
10 = Identifies water/ice, derived from in the original landcover dataset.
AFS
1
10
Count
Count
Double
8
0
0
Total number of pixels with a given value
Esri
VolatileFuelPrevalence
Volatile Fuel Prevalence
String
255
0
0
Simplified text description of the volatile fuel prevalence values.
AFS
Maximum
Maximum prevalence (i.e., surrounded by) of hazardous/highly flammable vegetation in the surrounding area.
AFS
High
High prevalence of hazardous/highly flammable vegetation in the surrounding area.
AFS
Moderate
Moderate prevalence of hazardous/highly flammable vegetation in the surrounding area.
AFS
Low
Low prevalence of hazardous/highly flammable vegetation in the surrounding area.
AFS
Very Low
Very low prevalence of hazardous/highly flammable vegetation in the surrounding area.
AFS
RED
RED
SmallInteger
2
5
0
RGB value for Red. Used to control the default display of the raster.
AFS
GREEN
GREEN
SmallInteger
2
5
0
RGB value for Green. Used to control the default display of the raster.
BLUE
BLUE
SmallInteger
2
5
0
RGB value for Blue. Used to control the default display of the raster.
AFS
ALPHA
ALPHA
SmallInteger
2
5
0
Used to control the default display of the raster.
AFS
Alaska Volatile Fuel (conifer) Prevalence, Long Distance Spotting Raster and Attribute Table.
Pixel
145829
208710
30.000000
30.000000
8
1
Upper Left
FALSE
LZ77
1
pixel codes
SDR
TRUE
row and column
30.000000
30.000000