cff-version: 1.2.0
title: "Petrel Fuel Layer v1.0 — Global FM40 Crosswalk"
message: "If you use this dataset, please cite it as below."
type: dataset
authors:
  - name: "Petrel Data"
    website: "https://petreldata.io"
date-released: "2026-07-28"
version: "v1.0-global-crosswalk"
license: "CC-BY-4.0"
url: "https://petreldata.io/layers/fuel/v1.0"
keywords:
  - "wildfire"
  - "fuel model"
  - "FM40"
  - "Scott and Burgan"
  - "surface fuels"
  - "fire behavior"
  - "land cover"
  - "Koppen-Geiger"
  - "Cell2Fire"
  - "global"
abstract: >
  Global Scott & Burgan 40 (FM40) surface fuel-model class dataset at native
  ~270 m (9 arcsec) resolution, as a single categorical raster (uint8; FM40
  class code; 255 = NoData). FM40 is assigned by a deterministic crosswalk from
  exactly two inputs — ESA WorldCover 2021 land cover (CC-BY-4.0) and Beck et
  al. (2018) Köppen-Geiger present-day climate (CC-BY-4.0) — with land cover
  setting the fuel family (non-burnable / grass / grass-shrub / shrub /
  timber-understory / timber-litter) and climate refining it (e.g. Mediterranean
  shrub → SH5, tropical forest → TL9, boreal forest → TU5). Because it derives
  only from CC-BY-4.0 sources — no Meta canopy, no LANDFIRE, no share-alike
  inputs — the product is fully CC-BY-4.0 and commercially redistributable; it
  replaces the earlier CC-BY-NC ML fuel line as the free, commercial-clean
  layer. Globally consistent by construction (no US-training bias). v1.0 ships
  the fuel-model class only; per-pixel canopy attributes are a v1.1 item.
  Coast-clipped to the GSHHG full-resolution shoreline; Antarctica excluded.
  Validated by biome plausibility and US LANDFIRE family agreement. Feeds the
  Petrel Wildfire Hazard's Cell2Fire surface-fuel grid.
references:
  - type: report
    authors:
      - family-names: "Scott"
        given-names: "Joe H."
      - family-names: "Burgan"
        given-names: "Robert E."
    title: "Standard fire behavior fuel models: a comprehensive set for use with Rothermel's surface fire spread model"
    year: 2005
    doi: "10.2737/RMRS-GTR-153"
  - type: data
    authors:
      - family-names: "Zanaga"
        given-names: "Daniele"
    title: "ESA WorldCover 10 m 2021 v200"
    year: 2022
    doi: "10.5281/zenodo.7254221"
  - type: article
    authors:
      - family-names: "Beck"
        given-names: "Hylke E."
    title: "Present and future Koppen-Geiger climate classification maps at 1-km resolution"
    year: 2018
    doi: "10.1038/sdata.2018.214"