• LANDFIRE.US_vdist2010

    Metadata Updated: August 16, 2020

    LANDFIRE disturbance data are developed to provide temporal and spatial information related to landscape change for determining vegetation transitions over time and for making subsequent updates to LANDFIRE vegetation, fuel and other data. Disturbance data include attributes associated with disturbance year, type, and severity. These data are developed through use of Landsat satellite imagery, local agency derived disturbance polygons, and other ancillary data.DATA SUMMARY: The disturbance data are developed through a multistep process. Inputs to this process include; Landsat imagery and derived NBR (normalized burn ratio) data; polygon data developed by local agencies for the LF Events geodatabase effort; fire data obtained from MTBS (Monitoring Trends in Burn Severity), BARC (Burned Area Reflectance Classification), and RAVG (Rapid Assessment of Vegetation Condition after Wildfire) fire mapping efforts, PAD (Protected Area Database) data, and Smartfire ignition point buffer polygons (buffer distance dependent on sensor accuracy). LANDSAT imagery and derived NBR data are not included in Alaska disturbance grid development. LF Event polygon data are provided to LANDFIRE by various local, regional, and national agencies and organizations. Disturbance type and year information is included as attributes for each polygon and transferred to the disturbance grids. Severity is determined by using dNBR (difference Normalized Burn Ratio) data classified into high, medium, and low severity levels based on dNBR standard deviation thresholds. Vegetation Change Tracker (VCT) algorithms (Huang, et. al. 2008) were used to identify disturbances outside of LF Events for the LF2008 effort (years 1999-2008). Multi-Index Integrated Change Algorithm (MIICA) methods (Jin, et. al. 2013) were used to identify additional change in 2008 as well as disturbances in 2009 and 2010 for the LF2010 effort. Since disturbance type (i.e. causality) is not determined in the VCT or MIICA processes, a spatial analysis is done comparing the output to buffered (500 meter) LF Events, Protected Area Database GAP Status information (land use and management characteristics), and Smartfire ignition point buffer polygons. While not providing a precise type of disturbance, this analysis provides information useful for narrowing down the types of disturbance that could or could not typically occur. Each zone has 12 disturbance grids, one for each year 1999 to 2010. Each grid is attributed with year, disturbance type (if known, otherwise a description of possible types), severity, data sources, and confidence (type and severity). VdistYEAR grids are a composite of the disturbance grids recoded by disturbance type, disturbance severity, and time since disturbance YEAR to meet LANDFIRE vegetation transition modeling needs. Fire occurrences take precedence, followed by the most recent disturbance taking precedence.

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    Metadata Date February 1, 2007
    Metadata Created Date August 16, 2020
    Metadata Updated Date August 16, 2020
    Reference Date(s) January 1, 2010 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from USGS-Harvest

    Additional Metadata

    Resource Type Dataset
    Metadata Date February 1, 2007
    Metadata Created Date August 16, 2020
    Metadata Updated Date August 16, 2020
    Reference Date(s) January 1, 2010 (publication)
    Responsible Party Wildland Fire Science, Earth Resources Observation and Science Center, U.S. Geological Survey (Point of Contact)
    Contact Email
    Access Constraints Use Constraints: Although LANDFIRE products are delivered as 30-meter pixels, they should not be used at the individual pixel level or on small groups of pixels. LANDFIRE products were designed to support 1) national (all states) strategic planning, 2) regional (single large states or groups of smaller states), and 3) strategic/tactical planning for large sub-regional landscapes and Fire Management Units (FMUs) (such as significant portions of states or multiple federal administrative entities). The applicability of LANDFIRE products to support fire and land management planning on smaller areas will vary by product, location, and specific use. Further investigation by local and regional experts should be conducted to inform decisions regarding local applicability. However, it is the responsibility of the local user, using LANDFIRE metadata and local knowledge, to determine if and/or how LANDFIRE can be used for particular areas of interest. LANDFIRE products are not intended to replace local products, but rather serve as a back-up by providing wall-to-wall cross-boundary products. It is the responsibility of the user to be familiar with the value, assumptions, and limitations of LANDFIRE products. Managers and planners must evaluate LANDFIRE data according to the scale and requirements specific to their needs., Access Constraints: None
    Bbox East Long -65.25444546636928
    Bbox North Lat 51.64968101623376
    Bbox South Lat 22.765446426860603
    Bbox West Long -127.98775263969655
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id d2344d14-bce4-48f7-9039-3f007415da54
    Harvest Source Id 00f54869-3a43-480d-a67c-0ba115f5d739
    Harvest Source Title USGS-Harvest
    Licence This product is reproduced from geospatial information prepared by the U.S. Department of Agriculture, Forest Service and USGS EROS. By removing the contents of this package or taking receipt of these files via electronic file transfer methods, you understand that the data stored on this media is in draft condition. Represented features may not be in an accurate geographic location. The Forest Service and USGS EROS make no expressed or implied warranty, including warranty of merchantability and fitness, with respect to the character, function, or capabilities of the data or their appropriateness for any user's purposes. The Forest Service and USGS EROS reserve the right to correct, update, modify, or replace this geospatial information without notification.
    Metadata Language
    Metadata Type geospatial
    Progress UNDER REVIEW
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True

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