LANDFIRE (LF) Remap is a comprehensive mapping effort that used new data to create a new base map product representing contemporary conditions. LF's second base map, LF Remap, represents 2016 ground conditions and is being released incrementally 2019-2020.
The first base map (LF National) product suite was developed using Landsat data circa 2001. Since landscape change never ceases, LF National products were updated regularly to more accurately represent current conditions and account for landscape disturbances (LF 2008, 2010, 2012, and 2014). With a base map that is over 15 years old, it was time to remap the landscape.
LF Remap was designed to produce vegetation and fuels data that inform wildland fire and ecological decision systems. The Program's consistent methodologies and processes incorporate current satellite imagery, contemporary data sources, and the latest software and hardware technologies. The resulting LF Remap products offer significant improvements to all previous LF versions.
Improvements in image compositing, tiling algorithms, plus faster computing hardware ensures LF data will remain relevant. To achieve this, LF Remap leveraged the Landsat archive, lidar data, and user contributed field plot data compiled into the LF Reference Database (LFRDB), to create the new base map vegetation products. Learn more about contributing plot data for future mapping efforts.
All LF product categories have been refined as part of Remap: Reference • Disturbance • Vegetation • Fuel • Fire Regimes • Topographic
LF Remap Schedule
LF Remap production began in 2017. Product releases by LF Geographic Areas (GeoAreas), six for CONUS, and one each for Alaska, Hawaii, and the insular areas, started with the Northwest in early 2019 and will continue incrementally through 2020.
South Central SC
North Central NC
LF experienced FY 2018 budget reductions. The Program is evaluating options which may include schedule delays, scope adjustments, and deliverable cuts. As of March 2018, no changes have been made to the current schedule. After the budget is finalized, additional information and changes will be provided.
What to Expect — LF Remap Changes
The LF team at the USGS Earth Resources Observation and Science (EROS) Center used the latest data and processing techniques to produce new vegetation, fuels, and fire regime base layers for the LF Remap product suite, representing a circa 2016 ground condition.
LF Remap changes include:
- Unlimited, free access to the Landsat archive: Hundreds of thousands of Landsat 7 and 8 scenes were processed using EROS High Performance Computing resources, resulting in...
- Better Base Imagery
- Reduced clouds –Image composites are created using the best quality pixels from numerous images to create near cloud-free/near-cloud-free imagery.
- Fewer Seamlines– By using input imagery from a longer time horizon, along with improved preprocessing logic, and hands-on post-processing, the results are data with fewer phenological differences.
- Better map masks – Masks of specific land cover types such as water (Integration of Landsat Essential Climate Variables, i.e. Dynamic Surface Water Extent), barren /sparse that are important to fire behavior are being created.
- Better modeling masks – This includes alpine or riparian/wetland classes which restrict where certain vegetation types can be identified.
- Vegetation Structure and Lifeform:
- Improved plot selection - Incorporating the newest contributed data, eliminating outlier plots that may have been impacted by disturbance, allow models to be trained using the highest quality inputs.
- Improved base imagery – Has fewer seamlines and represents a longer time horizon, so that specific vegetation systems can be identified.
- Structure input information - Developed methods to leverage lidar data, which provides stronger linkages with vegetation structure, so that lifeform classification can be improved.
- Continuous canopy structure (Existing Vegetation Cover (EVC) and Existing Vegetation Height (EVH)) products – Developed methods to create existing continuous cover and height products to better inform fuels products.
- Existing Vegetation Type: Flexible vegetation type legends based on data driven range maps and ecoregions. Two classifications systems are used.
- Ecological Systems – Allows for the comparison of data over time and informs LF fuel data products,
- National Vegetation Classification (NVC) – Standard at the Group level hierarchy.
- Enhancements to EVT include:
- Ecological application - Riparian and wetland vegetation classes and sparsely vegetated classes were aggregated in previous LF versions. In LF Remap they are mapped separately.
- Disturbed areas - Annual disturbance data were used to identify recently disturbed areas based on expected vegetation type recovery period within the previous 10-year period.
- Wildland-urban interface (WUI) - Developed ruderal classes are better identified by combining updated WUI data with population density information from the U.S. Census Bureau.
- Standardized ruderal and invasive vegetation types - New ruderal classes identify semi-natural vegetation types using a standardized legend within the U.S. National Vegetation Classification.
- New and improved Auto-Keys - To classify plots
- Expert review and feedback - Of draft spatial products before delivery, so that fitness of use can be ensured.
- Additional Enhancements:
- Field Data – Unprecedented access to the best field data with BLM for AIM plots and NRCS for NRI plots primarily in non-forest areas.
- Geographic production unit – Existing Vegetation mapping image classification based on Omernik III/IV Ecoregions instead of National Land Cover Database map zones, which better matches the distribution of major vegetation types and in turn produces better output from modeling and resulting in less manual mapping techniques.
- LF Remap New Products:
- Historical Disturbance – The latest 10 years of disturbance data representing disturbance year and original disturbance type and severity, allowing multiple years of disturbance to be captured for each pixel. This allows a historical representation of disturbance on the landscape and helps classify fuel data assignments.
- National Vegetation Classification – Allows opportunities to evaluate the vegetation classification and mapped products.
- Fuel Vegetation Cover, Height, and Type – More accurately leverages fuel transition assignments related to disturbed areas by re-establishing pre-disturbance vegetation type, and binned cover and height products.
LF Remap Documentation
LF Remap - Utilization of Remotely Sensed Data to Classify Existing Vegetation Type and Structure to Support Strategic Planning and Tactical Response - characterizing vegetation type, cover, and height with Earth observation data enhances wildland fuel modeling.
LF Remap Summary Description - published in 2015 describes a summary outline on LF Remap. Information is presented in a question and answer format to address questions users may have.
Developing LF Remap by Production Unit - Products are being developed using a combination of legacy and new productions units.
Data Call Letter - request for contributing relevant data and information from multiple sources to ensure a comprehensive product.