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Data Alerts

Because we want to provide the best information possible, we will remove data from the Data Distribution Site if we find errors and replace it with corrected data. Please check this Data Alerts page and the Data Notifications page regularly for important updates.

Please contact the LANDFIRE (LF) helpdesk with questions.

 Recent Alerts:

posted 2016-10-19 [Disturbance] NE Fuel Disturbance 2010 (FDIST10) was updated October 19, 2016 ...

Subject: NE Fuel Disturbance 2010 (FDIST10) was updated due to a processing error.

Users are advised to delete local copies of this layer downloaded prior to October 19, 2016 and download the updated version.

posted 2015-06-02 [Fuel] Updates to LANDFIRE 2012 Alaska canopy layers ...

Subject: Updates to LANDFIRE 2012 Alaska canopy layers

Date: June 2, 2015

Reason for alert: An issue occurred in the canopy values for Boreal Floodplain Existing Vegetation Type (EVT) 2763.

LANDFIRE version(s): LANDFIRE 2012 (1.3.0)

Updated product(s) or information: The following LANDFIRE 2012 (LF 1.3.0) Alaska canopy layers were updated:

Canopy Bulk Density (CBD)
Canopy Base Height (CBH)
Canopy Cover (CC)
Canopy Height (CH)

Problem or issue description: When the canopy values for Boreal Floodplain Existing Vegetation Type (EVT) 2763 were calibrated they were two EVT's - 2014 and 2015 - and both had a canopy value of 0. However, these two EVT's were aggregated into one - EVT 2763 - with three lifeforms and the 0 canopy value was retained for LF National through LF 2012. Tree pixels with an EVC were not assigned CC because of the 0 canopy value. This issue has been corrected in LF 2012 for CC, CH, CBH, and CBD.

Advice to users: Users are advised to delete local copies of these layers downloaded prior to June 1, 2015 and download the updated versions. We regret any inconvenience this may cause. Please contact the LANDFIRE Help Desk with any questions.

posted 2015-04-09 [Vegetation|Fuel|Disturbance] LANDFIRE 2012 (LF_1.3.0) layers for the Northwest (NW) GeoArea were updated...

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.

posted 2014-09-08 [Topographic] The Alaska Aspect layer was updated due to a processing error...

Alaska Aspect was updated September 08, 2014. The Alaska Aspect layer was updated due to a processing error.

Users are advised to delete local copies of these layers downloaded prior to September 08, 2014 and download the updated versions. We regret any inconvenience this may cause.

posted 2012-07-23 A problem with LF 2008 (Refresh - LF_1.1.0) Vegetation Departure (vdep) for zone 79 was recently identified...

A problem with LF 2008 ("Refresh" -LF_1.1.0) Vegetation Departure (vdep) for zone 79 was recently identified. Values were misclassified.

Users are advised to delete any local copies of these layers downloaded prior to July 23, 2012 and download the current version. We regret any inconvenience this may cause.

posted 2012-07-17 LF 2001 (Refresh - LF_1.0.5) / LF 2008 (Refresh - LF_1.1.0) Succession Classes (sclass), Vegetation Condition Class (vcc), and Vegetation Departure (vdep)

LF 2001 ("Refresh" - LF_1.0.5) \/ LF 2008 ("Refresh"- LF_1.1.0) Succession Classes (sclass), Vegetation Condition Class (vcc), and Vegetation Departure (vdep) within the Southeast GeoArea were updated 7/17/12. These Southeast (SE) GeoArea (zones 37, 46, 48, 54, 55, 56, 98, and 99) data were some of the initial layers delivered for LF Refresh. Remaining GeoAreas were completed over the course of the next eighteen months and methods used for completing these data were refined, including improved agricultural, urban, and riparian/wetland mapping. LANDFIRE implemented these refinements in the SE GeoArea to maintain consistencies in processing methods.

Affected zones:
32, 36, 37, 44, 45, 46, 47, 48, 53, 54, 56, 57, 58, 59, 98, 99

Users are advised to delete local copies of these layers for LF 2001 (LF_1.0.5)/LF 2008 (LF_1.1.0) downloaded prior to July 17, 2012 and download the updated versions. We regret any inconvenience this may cause.

posted 2012-06-05 LANDFIRE 2008 (LF_1.1.0) Fire Behavior Fuel Models 40 (FBFM40) for Hawaii, zone 79, was updated 6/5/12...

LANDFIRE 2008 (LF_1.1.0) Fire Behavior Fuel Models 40 (FBFM40) for Hawaii, zone 79, was updated 6/5/12. The FBFM40 layer was updated due to an updated disturbance layer.

Users are advised to delete local copies of these layers downloaded prior to June 5, 2012 and download the updated versions. We regret any inconvenience this may cause.

posted 2012-06-05 LANDFIRE 2008 (LF_1.1.0) Fuel Disturbance 2008 (FDIST2008) for Hawaii, zone 79, was updated 6/5/12...

LANDFIRE 2008 (LF_1.1.0) Fuel Disturbance 2008 (FDIST2008) for Hawaii, zone 79, was updated 6/5/12. FDIST2008 was reclassified in certain areas of zone 79.

Users are advised to delete local copies of these layers downloaded prior to June 5, 2012 and download the updated versions. We regret any inconvenience this may cause.

posted 2012-05-11 LANDFIRE 2001 (LF_1.0.5)/LANDFIRE 2008 (1.1.0) fire regime layers for the zones 37, 46, 48, 54, 55, 56, 98, and 99 are updated 5/11/12...

LANDFIRE 2001 (LF_1.0.5)/LANDFIRE 2008 (1.1.0) fire regime layers for the zones 37, 46, 48, 54, 55, 56, 98, and 99 are updated 5/11/12. These layers were delivered incrementally over the course of a year beginning in April 2010 as 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 used for completing these data were refined, including improved agricultural, urban, and riparian/wetland mapping. To maintain consistencies in processing methods LANDFIRE has now implemented these refinements in the SE GeoArea.

Updated layers are Fire Regime Groups (FRG), Mean Fire Return Interval (MFRI), Percent Low-severity Fire (PLS), Percent Mixed-severity Fire (PMS), and Percent Replacement-severity Fire (PRS).

Users are advised to delete local copies of these layers for the SE GeoArea LANDFIRE 2001 (LF_1.0.5)/LANDFIRE 2008 (1.1.0) downloaded prior to May 11, 2012 and download the updated versions. We regret any inconvenience this may cause.

posted 2012-05-01 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...

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.

posted 2012-05-01 LANDFIRE 2008 (LF_1.1.0) fuel layers for zones 10, 19, 41, 37, 46, 48, 54, 98, and 99 are updated 5/1/12...

LANDFIRE 2008 (LF_1.1.0) fuel layers for zones 10, 19, 41, 37, 46, 48, 54, 98, and 99 are updated 5/1/12. The fuel layers were updated due to corrected input layers. Updated layers are Canopy Bulk Density (CBD), Canopy Base Height (CBH), Canopy Cover (CC), Canopy Height (CH), Fire Behavior Fuel Models 13/40 (FBFM13/40), and Fuel Characteristic Classification System Fuelbeds (FCCS).

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.

posted 2012-05-01 LANDFIRE 2008 (LF_1.1.0) disturbance layers for zones 37, 46, 48, 54, 98, and 99 are updated 5/1/12...

LANDFIRE 2008 (LF_1.1.0) disturbance layers for zones 37, 46, 48, 54, 98, and 99 are updated 5/1/12. The disturbance layers were updated due to corrected input layers. Updated layers are Disturbance 1999 -2008 (DISTYEAR), Fuel Disturbance 2008 (FDIST2008), and Vegetation Disturbance 2008 (VDIST2008).

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.

posted 2012-02-01 Biophysical Settings (BPS) versions 1.0.5/1.1.0 (Refresh 2001/2008) for the Southeast (SE) GeoArea are updated as of 1/30/12...

Biophysical Settings (BPS) versions 1.0.5/1.1.0 (Refresh 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.

posted 2012-02-01 Fuel Loading Models (FLM) versions 1.0.5/1.1.0 (Refresh 2001/2008) for the Southeast (SE) GeoArea are updated as of 1/30/12...

Fuel Loading Models (FLM) versions 1.0.5/1.1.0 (Refresh 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 FLM 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.

posted 2012-02-01 Some disturbance layers for zones 10 and 19 are updated as of 1/30/12...

Some disturbance layers for zones 10 and 19 are updated as of 1/30/12. An extraneous landscape change event polygon was included in the original processing. The extraneous polygon was removed and the following 3 layers are updated: Disturbance 2000 (DIST2000), Fuel Disturbance 2008 (FDIST2008), and Vegetation Disturbance 2008 (VDIST2008).

Users are advised to delete local copies of these disturbance layers downloaded prior to 1/30/12 and download the updated versions. We regret any inconvenience this may cause.

posted 2012-02-01 Some disturbance layers for zone 41 are updated as of 1/30/12...

Some disturbance layers for zone 41 are updated as of 1/30/12. A windstorm landscape change event was excluded in the original processing. The windstorm event was added to the processing inputs and the following 3 layers are updated: Disturbance 1999 (DIST1999), Fuel Disturbance 2008 (FDIST2008), and Vegetation Disturbance 2008 (VDIST2008).

Users are advised to delete local copies of these disturbance layers downloaded prior to 1/30/12 and download the updated versions. We regret any inconvenience this may cause.

posted 2011-12-21 Vegetation layers for the Southeast (SE) GeoArea versions 1.0.5/1.1.0 (Refresh 2001/2008) are updated as of 12-20- 11...

Vegetation layers for the Southeast (SE) GeoArea versions 1.0.5/1.1.0 (Refresh 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:

    Existing Vegetation Cover (EVC)
    Existing Vegetation Height (EVH)
    Existing Vegetation Type (EVT)

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.

posted 2011-12-21 LF_1.0.5 / 1.1.0 (Refresh 2001/2008): Vegetation Departure was updated for the following zones...

A problem was recently identified with the Vegetation Departure (VDEP) layer LF_1.0.5 and LF_1.1.0 for zones 06, 12, 13, 14, 16, 22, 23, 28, 31, 38, and 41. Regions of VDEP were not previously calculated in these zones. This issue is resolved and customers are advised to delete any local copies of VDEP for these zones prior to 12-20-11 and download the updated version. We regret any inconvenience this may have caused.

posted 2011-12-21 A problem with LF_1.1.0 (Refresh 2008) zone 7 was recently identified...

A problem with LF_1.1.0 (Refresh 2008) zone 7 was recently identified. Areas in zone 7 were misclassified, affecting six fuel layers:

    zone 7 LF_1.1.0
    Canopy Bulk Density (CBD)
    Canopy Base Height (CBH)
    Canopy Cover (CC)
    Canopy Height (CH)
    13 Anderson Fire Behavior Fuel Models (FBFM13)
    40 Scott & Burgan Fire Behavior Fuel Models (FBFM40)

Users are advised to delete any local copies of these layers downloaded prior to 12-20-11 and download the current versions. We regret any inconvenience this may cause.

posted 2011-12-21 A problem with LF_1.0.5 (Refresh 2001) zone 30 was recently identified...

A problem with LF_1.0.5 (Refresh 2001) zone 30 was recently identified. Areas in zone 30 were misclassified, affecting two fuel layers:

    zone 30 LF_1.0.5
    13 Anderson Fire Behavior Fuel Models (FBFM13)
    40 Scott & Burgan Fire Behavior Fuel Models (FBFM40)

Users are advised to delete any local copies of these layers downloaded prior to 12-20-11 and download the current versions. We regret any inconvenience this may cause.

posted 2011-12-21 Fuel layers for the Southeast (SE) GeoArea versions 1.0.5/1.1.0 (Refresh 2001/2008) are updated as of 12-20- 11...

Fuel layers for the Southeast (SE) GeoArea versions 1.0.5/1.1.0 (Refresh 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 GeoAreas.

The updated LF_1.0.5/1.1.0 fuel layers for the SE GeoArea include:

    Canopy Bulk Density (CBD)
    Canopy Base Height (CBH)
    Canopy Cover (CC)
    Canopy Height (CH)
    13 Anderson Fire Behavior Fuel Model s (FBFM13)
    40 Scott and Burgan Fire Behavior Fuel Models (FBFM40)
    Fuel Characteristic Classification System Fuelbeds (FCCS)

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.

posted 2011-06-04 Zone 60: A problem was identified with the following layers...

A minor problem was recently identified with Canopy Bulk Density, Canopy Base Height, Canopy Cover, and Canopy Height for map zone 60. While affected acreage is small, users are advised to delete any local copies of these four layers downloaded prior to August 3, 2011 and download the updated versions. We regret any inconvenience this may have caused.

posted 2011-05-12 A problem with LF_1.1.0 (Refresh 2008) zones 1 - 25, 28 - 31, 39 -41 was recently identified...

A problem with LF_1.1.0 (Refresh 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. To read an expanded explanation concerning this Vegetation Transition Error click here.

posted 2011-05-12 A problem with LF_1.1.0 (Refresh 2008) zones 1 - 25, 28 - 31, 39 -41 was recently identified...

A problem with LF_1.1.0 (Refresh 2008) zones 1 - 25, 28 - 31, 39 -41 was recently identified. Areas in mechanical disturbances were misclassified. Affected layers include: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, 40 Scott & Burgan Fire Behavior Fuel Models, and Fuel Characteristic Classification System Fuelbeds. 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. To read an expanded explanation concerning this Vegetation Transition Error click here.

posted 2011-02-24 LF_1.0.0 (National) Zone 79: The following layers were updated...

The following fuel layers for zone 79 were updated February 23, 2011 to reflect the changes made during a recent vegetation/ fuel workshop in Honolulu, Hawaii: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2010-04-29 Zone 79: The first version of the Aspect layer for Hawaii was delivered in a binned format...

The first version of the Aspect layer for Hawaii, mapping zone 79, was delivered on the National Map in a binned format. Users are advised to delete any local copies of this layer downloaded prior to April 29, 2010 and download the updated unbinned version as of April 29, 2010. We regret any inconvenience this may have caused.

posted 2009-09-29 Zones 42, 47, 49, 52, 53, 57, and 59: The following fuel layers were updated...

The following fuel layers for zones 42, 47, 49, 52, 53, 57, and 59 were updated 09/29/09 to reflect the changes made during our most recent fuel calibration exercise held in Marion, Illinois and London, Kentucky: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2009-08-20 Zones 31, 32, 35, 36, 38, 38, 40, and 43: The following fuel layers were updated...

The following fuel layers for zones 31, 32, 35, 36, 38, 38, 40, and 43 were updated 08/20/09 to reflect the changes made during our most recent fuel calibration exercise held in Decatur, TX and Pierre, SD: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2009-07-21 Zones 12, 16, 17, and 23: The following fule layers were updated...

The following fuel layers for zones 12, 16, 17, and 23 were updated July 21, 2009 to reflect the changes made during our most recent fuel calibration exercise held in Salt Lake City, UT: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2009-06-19 Zones 14, 15, 24, and 28: The following fuel layers were updated...

The following fuel layers for zones 14, 15, 24, and 28 were updated June 19, 2009 to reflect the changes made during our most recent fuel calibration exercise held in Phoenix, AZ: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2009-04-18 Zones 10, 18, 19, 37, 44, 45, 46, 48, 54, 98, and 99: The following fuel layers were updated...

The following fuel layers for zones 10, 18, 19, 37, 44, 45, 46, 48, 54, 98, and 99 were updated to reflect the changes made during the most recent fuel calibration workshops held in Missoula, MT; Atlanta, GA; and Jackson, MS: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use these updated versions of the fuel suite.

posted 2009-03-31 Zones 70, 71, and 75: Revisions were recently made to the Existing Vegetation Cover, Existing Vegetation Height, and Existing Vegetation Type layers...

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.

posted 2008-12-24 Zones 60 - 66: The following fuel layers were updated...

The following fuel layers for zones 60, 61, 62, 63, 64, 65, and 66 were updated December 22, 2008, to reflect the changes made during our most recent fuel calibration exercise held in Pennsylvania and New Hampshire: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2008-11-17 Zone 99: A problem was recently identified with the Vegetation Departure (VDEP) layer...

A problem was recently identified with the Vegetation Departure (VDEP) layer for Mapping Zone 99. Processing of this layer for Zone 99 was incomplete, leaving many of the pixels unassigned. Users are advised to delete any local copies of this layer for Zone 99 and download the updated version as of November 17, 2008. We regret any inconvenience this may have caused.

posted 2008-10-22 Zones 15, 18, & 28: The Environmental Site Potential (esp) layer was updated...

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.

posted 2008-10-22 Zone 44: A problem was identified with the Biophysical Settings layer...

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.

posted 2008-10-22 Zone 99: A problem was identified with the Vegetation Condition Class (VCC) layer...

A problem was recently identified with the Vegetation Condition Class (VCC) layer for mapping zone 99. VCC processing for zone 99 was incomplete leaving many of the pixels unassigned. Users are advised to delete any local copies of this layer for zone 99 and download the updated version as of October 20, 2008. We regret any inconvenience this may have caused.

posted 2008-10-22 Zones 26, 33, & 34: A problem was identified with the Canopy Bulk Density (cbd) layer...

A problem was recently identified with the Canopy Bulk Density (cbd) layer for mapping zones 26, 33, and 34. Development of cbd was mistakenly inconsistent with surrounding zones and has been subsequently reprocessed to maintain inter-zone consistency. Users are advised to delete any local copies of this layer for these three zones and download the updated versions as of October 20, 2008. We regret any inconvenience this may have caused.

posted 2008-05-20 Zones 25, 26, 27, 29, 30, 33, 34, 37, 44, 45, 55, 56, 58, and 98: A problem was identified with the relative age setting in the VDDT models...

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.

posted 2008-05-20 Zones 41, 50, & 51: The following fuel layers were updated...

The following fuel layers for zones 41, 50 and 51 were updated spring 2008 to reflect the changes made during our most recent fuel calibration exercise held in Minneapolis, Minnesota: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2008-03-25 Zones 55, 56, & 58: The following fuel layers were updated...

The following fuel layers for zones 55, 56 and 58 were updated winter 2008 to reflect the changes made during our most recent fuel calibration exercise held in Lake City, Florida and Charleston, South Carolina: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2008-03-25 Zone 41: A problem was identified with the Aspect layer...

A problem was recently identified with the Aspect layer from Mapping Zone 41. The original version of Aspect was missing Isle Royale in the northeastern region of the zone. Aspect was recalculated to include the island. Customers are advised to delete any local copies of this Aspect layer downloaded prior to March 21, 2008, and download the current version. We regret any inconvenience this may have caused.

posted 2007-11-19 Zones 25, 26, 27, 33 & 34: The following fuel layers were updated...

The following fuel layers for zones 25, 26, 27, 33 and 34 were recently updated to reflect the changes made during our most recent fuel calibration exercise held in Albuquerque, New Mexico: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2007-09-18 Zone 37: A problem was identified with the following layers...

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.

posted 2007-07-23 Zones 9 and 24: The following fuel layers for were updated...

The following fuel layers for zones 9 and 24 were updated July 20, 2007 to include canopy characteristics changes: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Affected acreage is small. Users are encouraged to use this updated version of the fuel suite.

posted 2007-07-23 Zones 29 and 30: The following fuel layers for were updated...

The following fuel layers for zones 29 and 30 were updated July 20, 2007 to reflect the changes made during our most recent fuel calibration exercise held in Rapid City, South Dakota: Canopy Bulk Density, Canopy Base Height, Canopy Cover, Canopy Height, 13 Anderson Fire Behavior Fuel Models, and 40 Scott & Burgan Fire Behavior Fuel Models. Users are strongly encouraged to use this updated version of the fuel suite.

posted 2007-07-03 Zones 29 & 55: A problem was identified with the following layers...

A minor problem was recently identified with the Canopy Bulk Density and Canopy Base Height layers for mapping zones 55 and 29. Users are advised to delete any local copies of these two layers downloaded prior to July 3, 2007 and download the current versions. We regret any inconvenience this may have caused.

posted 2007-05-31 All western mapping zones: All updated fuel layers are available...

All updated fuel layers for the western mapping zones are available as of May 31, 2007. These updates were conducted to: 1) implement all refinements identified during the calibration workshops, 2) update the fuel layers in response to planned revisions of vegetation products, 3) include data from more plots in the formulation of canopy fuel products, 4) include key deciduous species in the formulation of canopy fuel products, and 5) leverage a new exotics data product to identify annual grasses pervasive throughout much of the western United States.

posted 2007-01-03 Zone 13: A problem was identified with the Succession Classes layer...

A problem was recently identified with the Succession Class layer from Mapping Zone 13. Small residual errors from data processing resulted in a slight difference in the Biophysical Setting layer used to create the Succession Class layer as well as the version of the Biophysical Setting layer released for download. These differences could result in errors in calculating local measurements of Fire Regime Condition Class with the FRCC Mapping Tool. Customers are advised to delete any local copies of this Succession Class layer downloaded prior to January 1, 2007 and download the current version. We regret any inconvenience this may have caused.