Reason for alert: Annual Disturbance 2022 has been updated for Alaska (AK), NW, and the SW GeoAreas.

Updated product(s) or information: The LF 2022 Update Annual Disturbance 2022 (Dist22) product has been updated and now has more events labelled in AK, NW, and SW GeoAreas of the Conterminous United States (CONUS).

Problem or issue description: The LF 2022 Dist22 products have been updated for the NW and SW GeoAreas within CONUS, and for AK, to incorporate more events. Some events that were previously classified as unknown at the release of these extents earlier this year have now been assigned a more descriptive classification due to LANDFIRE re-gathering input data.

Users are advised to download the updated version of Dist22 for CONUS (SW and NW GeoAreas) and AK, and/or download the updated stand-alone .csv. We encourage users to delete any local copies of these products that were downloaded prior to 11/01/2023.

Reason for alert: Some LF 2020 products have received minor updates and fixes to the attribute tables and the Attribute Data Dictionaries (ADD).

Updated product(s) or information: LF 2020 HDist, EVT, BPS, FVH, FVC, FVT, CH, VCC, SClass, FBFM13 and FBFM40 .csv and raster attribute tables (RATs) were updated on 10/06/2023. Consequently, this also includes an update to descriptions within the ADD for CH and FVH, and within the metadata. All extents are impacted by these changes.

Problem or issue description: LF 2020 HDist attribute tables (.csv and RAT) were updated to correct some codes for the column HDIST_CAT. CH and FVH attribute tables (.csv, RATs, and the ADD) were updated to describe bins more clearly. All other products (EVT, BPS, FVC, FVT, VCC, SClass, FBFM13, and FBFM40) had the attribute tables updated to improve row order, standardize No Data values, and improve column headers.

These updates and fixes are minor, but users are advised to download the updated versions for CONUS, AK, HI, and the Insular Areas and/or download the corrected stand-alone .csv. We encourage users to delete any local copies of these products that were downloaded prior to 10/06/2023. We regret any inconvenience this may cause.

Reason for alert: Some LF 2022 fuel products have received minor updates to the attribute tables and the Attribute Data Dictionaries (ADD).

Updated product(s) or information: LF 2022 CH, FVC, FVH, FBFM13, and FBFM40 .csv and raster attribute tables (RATs) were updated on 09/26/2023. Consequently, this also includes an update to descriptions within the ADD for CH and FVH, and within the metadata. Extents impacted include both CONUS (for all GeoAreas currently released) and AK.

Problem or issue description: CH and FVH attribute tables (.csv and the ADD) were updated to describe bins more clearly. All other products (FVC, FBFM13, and FBFM40) had the attribute tables updated to improve row order.

These updates are minor, but users are advised to download the updated versions for both CONUS and AK and/or download the corrected stand-alone csv. We encourage users to delete any local copies of these products that were downloaded prior to 09/26/2023. We regret any inconvenience this may cause.

Reason for alert: Data access with non-ESRI scripting will be removed July 1, 2022.

Updated product(s) or information: Data access using non-ESRI scripting.

Problem or issue description: With the release of the new viewer (https://landfire.gov/viewer), ArcGrid, LFDAT, and Non-ESRI scripting (data access ESRI tools and formats) were archived March 31, 2022. It's important for users to know that non-ESRI scripting will be removed July 1, 2022.

Updated product(s) or information: LF 2016 Remap (LF 2.0.0) EVC mosaic download was updated on 11/4/2020 with corrected inputs. This issue is limited to the LF Remap EVC mosaic download.

Problem or issue description: LF 2016 Remap EVC mosaic download was updated to correct a processing error in the initial release. Pixels with the value of 255 (Shrub Cover = 55%) were set to NoData (-9999) in error. Users are advised to download the updated versions of the EVC and delete local copies of these products that were downloaded prior to 11/4/2020. We regret any inconvenience this may cause.

Updates to LANDFIRE (LF) Remap Vegetation product for Southwest and South Central GeoAreas

Reason for alert: LF Remap Exiting Vegetation Cover (EVC) was updated for the Southwest (SW) and South Central (SC) GeoAreas.

Updated product(s) or information: LF Remap (LF 2.0.0) EVC for the SW and SC GeoAreas was updated on 10/3/2019 with corrected inputs. This issue is limited to the LF Remap EVC for the SW and SC GeoAreas.

Problem or issue description: LF Remap EVC for the SW and SC GeoAreas was updated to correct a processing error in the initial release. Pixels with the value of 255 (Shrub Cover = 55%) were set to zero in error. Users are advised to download the updated versions of the EVC and delete local copies of these products that were downloaded prior to 10/3/2019. We regret any inconvenience this may cause.

LANDFIRE 2001, 2008, 2010, 2012 (LF 1.0.5, LF 1.10, LF 1.2.0, LF 1.3.0) BPS and SCLASS for the Alaska GeoArea were updated 06/09/2017 due to a processing error. The error resulted in overmapping nodata (value -9999) along mapping zone boundaries.

Users are advised to delete local copies of this layer downloaded prior to 06/09/2017 and download the updated version. Biophysical Settings
Succession Classes

LANDFIRE 2012 (LF_1.3.0) layers for the Northwest (NW) GeoArea were updated 4/9/2015 with corrected input layers. Updated layers include:
Existing Vegetation Type (EVT)
Existing Vegetation Height (EVH)
Existing Vegetation Cover (EVC)
Canopy Bulk Density (CBD)
Canopy Base Height (CBH)
Canopy Cover (CC)
Canopy Height (CH)
Fire Behavior Fuel Models 13/40 (FBFM13/40)
Disturbance 2012 (D2012)
Fuel Disturbance 2012 (FDIST2012)
Vegetation Disturbance 2012 (VDIST2012)
Vegetation Transition Magnitude (VTM2012)

Users are advised to download the updated versions and delete local copies of these layers that were downloaded prior to April 8, 2015. We regret any inconvenience this may cause.

LANDFIRE 2008 (LF_1.1.0) existing vegetation layers for zones 10, 19, 41, 37, 46, 48, 54, 98, and 99 are updated 5/1/12. The existing vegetation layers were updated due to corrected input layers. Updated layers are Existing Vegetation Type (EVT), Existing Vegetation Height (EVH), and Existing Vegetation Cover (EVC).

Users are advised to delete local copies of these layers downloaded prior to May 1, 2012 and download the updated versions. We regret any inconvenience this may cause.

Biophysical Settings (BPS) versions 1.0.5/1.1.0 (LF 2001/2008) for the Southeast (SE) GeoArea are updated as of 1/30/12. LF 1.0.5/1.1.0 was delivered incrementally over the course of a year beginning in April 2010 with the SE GeoArea (zones 37, 46, 48, 54, 55, 56, 98, and 99). Remaining GeoAreas were completed over the course of the next eighteen months and methods for completing these data were refined, including improved agricultural, urban, and riparian/wetland mapping. LANDFIRE has now implemented these refinements in the SE GeoArea.

Users are advised to delete local copies of the BPS layer for the SE GeoArea LF 1.0.5/1.1.0 downloaded prior to 1/30/12 and download the updated versions. We regret any inconvenience this may cause.

Vegetation layers for the Southeast (SE) GeoArea versions 1.0.5/1.1.0 (LF 2001/2008) are updated as of 12-20-11. LF 1.0.5/1.1.0 was delivered incrementally over the course of a year beginning in April 2010 with the SE GeoArea (zones 37, 46, 48, 54, 55, 56, 98, and 99). Remaining GeoAreas were completed over the course of the next eighteen months. Methods for completing these data were refined, including improved agricultural, urban, and riparian/wetland mapping. LANDFIRE implemented these refinements in the SE GeoArea.

The updated LF 1.0.5/1.1.0 vegetation layers for the SE GeoArea include:

Users are advised to delete local copies of these SE GeoArea LF 1.0.5/1.1.0 layers downloaded prior to 12-20-11 and download the updated versions. We regret any inconvenience this may cause.

A problem with LF_1.1.0 (LF 2008) zones 1 - 25, 28 - 31, 39 -41 was recently identified. Areas in mechanical disturbances were misclassified. Affected layers include: Existing Vegetation Cover, Existing Vegetation Height, and Existing Vegetation Type. While the affected acreage varies depending on the amount of mechanical disturbance found in any given zone, users are advised to delete any local copies of these layers downloaded prior to May 12, 2011 and download the current versions. We regret any inconvenience this may cause. Expanded explanation concerning this Vegetation Transition Error.

Revisions were recently made to the Existing Vegetation Cover, Existing Vegetation Height, and Existing Vegetation Type layers for mapping zones 70, 71, and 75. Users are advised to delete any local copies of these three layers downloaded prior to 03/31/09 and download the current versions. We regret any inconvenience this may have caused.

The Environmental Site Potential layer for mapping zones 15, 18, and 28 was updated October 20, 2008. Users are encouraged to use this updated version of the fuel suite.

A minor problem was recently identified with the Biophysical Settings layer for Mapping Zone 44. Users are advised to delete any local copies of this layer downloaded prior to October 20, 2008 and download the current version. We regret any inconvenience this may have caused.

Relative age was not set correctly in the VDDT models in the following eastern zones when they were first made available for download from www.landfire.gov: 25, 26, 27, 29, 30, 33, 34, 37, 44, 45, 55, 56, 58, and 98. Relative age, according to LANDFIRE modeling rules, should be set to the inverse of the end age of the class (for example, if the class end age is 10 and relative age is used, it should be set to -10). In the aforementioned zones, relative age was set to the class end age rather than the inverse of the class end age. In some cases, an incorrect relative age setting could change the model results. The LANDFIRE team has corrected the relative age issue and redelivered corrected files. For zone 25 a new version of the model description document was released to correct inaccurate descriptive information related to this issue. For all other zones, only the VDDT database was changed. The error in the relative age setting did not affect any of the mapped products. Customers are advised to delete any local version 1 databases (that is, those that have "v1" in the file name) they may have downloaded and replace them with the version 2 databases (those that have "v2" in the file name) currently available from the LANDFIRE website.

A minor problem was recently identified with the Aspect, Elevation, Slope, Existing Vegetation Cover, Existing Vegetation Height, and Existing Vegetation Type layers for mapping zone 37. While affected acreage is very small, users are advised to delete any local copies of these six layers downloaded prior to September 6, 2007 and download the updated versions as of September 18, 2007. We regret any inconvenience this may have caused.