Pictures of what the LF program incorporates with the LANDFIRE logo on the left and USFS and DOI on the right
LANDFIRE - multi-partner wildland fire, ecosystem, and wildland fuel mapping project USFS DOI
[Skip to Content]
  Button for Who Are We
Homepage » Disturbance » Vegetation Transition Magnitude

Vegetation Transition Magnitude

Data Products:Reference  ∕  Disturbance  ∕  Vegetation  ∕  Fuel  ∕  Fire Regime  ∕  Topographic  ∕  Who are We
     Notifications Alerts

Latest NewsLatest News

Get Data

The Vegetation Transition Magnitude (VTM) product represents the relative magnitude of change applied to a pixel during the LANDFIRE (LF) vegetation update process. This product provides information regarding disturbance type and the resulting impact on vegetation life-form or tree canopy cover through 2014.

The mapping process integrates Annual Disturbance products. The effect of these disturbances on the vegetation are modeled or predicted using tables linking pre-disturbance existing vegetation type, height, and cover and possible disturbance types and severities with post-disturbance existing vegetation type, height, and cover. Forested vegetation tables are informed by computer simulations in the Forest Vegetation Simulator (FVS) while non-forest vegetation is informed by a series of simple rule-sets generated for each map zone. The tables spatially link vegetation and disturbance to assign existing vegetation, height, and cover. A code is assigned to unique combinations of disturbance type and change magnitude, which is expressed either in a change of vegetation life-form or a change in tree cover.

This product was not developed after LF 2014.

Product availability
Attribute Data DictionaryPDF

Comma separated value (CSV) files can be found in the LF Library.

Download Data



Users may experience intermittent service Thursday evenings due to routine maintenance.
The LF Map Viewer (DDS) will be down every 3rd Wednesday from 8 am - 10:00 am (CDT) for routine maintenance.
To view and print a PDF you must obtain and install the Acrobat® Reader, available at no charge from Adobe Systems.
*DOI and USGS link and privacy policies apply.
Looking for something: Site Map   /   Search
Page Contact Information: LF Helpdesk