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A timber truck fully loaded with logs drives over a very simple wooden bridge in a forest.
A timber truck fully loaded with logs drives over a very simple wooden bridge in a forest.
Institute of

WF Forestry

Global Forest Maps Compared: Policy Brief and Study Available

As part of the GEOS-EUDR project, the Thünen Institute of Forestry assessed 21 global forest and tree cover datasets to evaluate their suitability for verifying compliance with the EU Deforestation Regulation (EUDR).

© Juliana Freitas Beyer

Forest Agreement Layer: This image illustrates the Forest Agreement Layer, which combines nine independent forest and tree cover maps. The layer highlights areas where the maps most strongly agree on forest or tree cover (agreement across all nine maps) and those where agreement is lowest (only one map).

The findings are summarized in the newly released Technical and Policy Brief No.1, which is based on the peer-reviewed study Freitas-Beyer et al. (2025) recently published in the Journal Remote Sensing.

The assessment found that only eight datasets meet key spatial, temporal and definitional criteria for EUDR compliance checks, and only two datasets fully match the EUDR forest definition (canopy cover ≥10%, height ≥5 m, minimum mapping unit ≥0.5 ha). The study also highlights significant regional inconsistencies, risks of over- and underestimation, and challenges in distinguishing natural forests from plantations and agroforestry systems.

The policy brief offers practical guidance for operators and supply chain actors preparing due diligence statements, Competent supervisory authorities, and policy and decision-makers shaping data and monitoring frameworks.

Key recommendations include:

  • avoiding reliance on a single map,
  • combining multiple remote sensing datasets,
  • integrating national or regional reference information,
  • and promoting harmonization of forest definitions to improve comparability.

The GEOS-EUDR project is funded by the German Federal Ministry for Economic Cooperation and Development (BMZ).

Contact at the Thünen Institute:

Juliana Freitas Beyer
Institute of Forestry
Scientist · M.Sc.
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