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arxiv: 2605.19605 · v1 · pith:WAPBVC4Onew · submitted 2026-05-19 · 💻 cs.CV

deadtrees.earth-aerial: A Multi-Resolution Aerial Image Dataset for Tree Cover and Mortality Detection

Pith reviewed 2026-05-20 05:33 UTC · model grok-4.3

classification 💻 cs.CV
keywords aerial imagerytree mortalitytree cover segmentationmachine learning datasetsforest monitoringremote sensingcomputer visionbiome coverage
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The pith

Two new open datasets enable joint segmentation of tree cover and mortality from global aerial imagery for the first time.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

Forests worldwide face growing threats from climate change, fires, pests, and pathogens, making scalable monitoring of tree cover and mortality essential. Progress has been limited by the lack of harmonized, globally representative datasets suited for machine learning on centimeter-scale aerial imagery. This paper releases DTE-aerial-train, a training collection of 385K multi-resolution patches with audited pseudo-labels, and DTE-aerial-bench, a balanced test set of 25 orthoimages with expert annotations. The datasets together span tropical, temperate, boreal, and dryland biomes plus varied forest structures and mortality patterns. Baselines trained on the data raise mortality segmentation performance, including a notable lift in boreal regions.

Core claim

The paper introduces DTE-aerial-train, comprising 385K image patches of 1024x1024 pixels at 2.5-20 cm resolution with multi-class expert-annotated and audited pseudo-labels, and DTE-aerial-bench, a geographically balanced set of 25 orthoimages yielding 525 patches with high-quality expert labels for both tree cover and mortality. Both resources cover multiple biomes and support joint segmentation models that improve F1 scores for mortality detection across scales.

What carries the argument

The DTE-aerial-train and DTE-aerial-bench datasets, which supply multi-resolution aerial patches paired with labels for joint tree cover and mortality segmentation.

Load-bearing premise

The expert-annotated and audited pseudo-labels for tree cover and mortality are accurate and consistent enough across biomes, forest structures, and mortality patterns.

What would settle it

Independent expert re-annotation of a random subset of the benchmark patches that shows low agreement with the released labels would demonstrate that label quality is insufficient for reliable model training and evaluation.

Figures

Figures reproduced from arXiv: 2605.19605 by Aaron Sheppard, Ayushi Sharma, Belqis Ahmadi, Clemens Mosig, Jan Dirk Wegner, Janusch Vajna-Jehle, Jonathan Schmid, Lukas Drees, Nathan Jacobs, Paul Neumeier, Salim Soltani, Teja Kattenborn.

Figure 1
Figure 1. Figure 1: Dataset overview. (Top) Global, crowd-sourced aerial imagery from deadtrees.earth, representing one of the largest high-resolution collections for tree mortality. The training set spans tropical, temperate, boreal, and dryland biomes, capturing diverse canopy structures and forest conditions, while the benchmark is a curated subset emphasizing label quality. (Bottom) Distribution of sites and patches acros… view at source ↗
Figure 2
Figure 2. Figure 2: Qualitative examples of aerial imagery tiles and corresponding semantic masks (tree [PITH_FULL_IMAGE:figures/full_fig_p005_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: Qualitative comparison of segmentations on benchmark patches. Our method produces [PITH_FULL_IMAGE:figures/full_fig_p009_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: Multi-scale annotation and resampling in DTE-aerial-bench. Labels are created at 5 cm [PITH_FULL_IMAGE:figures/full_fig_p014_4.png] view at source ↗
read the original abstract

Forests worldwide are increasingly threatened by climate change and disturbances such as fire, pests, and pathogens, creating an urgent need for scalable monitoring of tree cover and tree mortality. Aerial imagery from drones and aircraft is a key data source for detailed and large-scale mapping of tree crowns and mortality. However, related progress is limited by the lack of globally representative, harmonized datasets for joint segmentation of tree cover and mortality. We introduce two novel, open, machine-learning-ready datasets to enable joint segmentation of tree cover and tree mortality from centimeter-scale aerial imagery for the first time at global scales. With DTE-aerial-train, we provide a training dataset comprising 385K image patches of size 1024x1024 pixels, with resolutions ranging from 2.5 to 20 cm. It includes multi-class expert-annotated and -audited pseudo-labels for tree cover and mortality. With DTE-aerial-bench, we provide a geographically balanced benchmark test set of 25 globally distributed orthoimages totaling 525 patches with high-quality expert annotations for both tree cover and mortality. Both the training and benchmark datasets span tropical, temperate, boreal, and dryland biomes and cover a wide range of forest structures and mortality patterns. Using the benchmark test set for evaluation, we establish strong reference baselines that improve mortality segmentation across all biomes and scales with significant gains in challenging regions, such as boreal forests, where the F1 score increases from 0.40 to 0.58 with around 45% relative improvement. All data, models, and code will be publicly released under permissive open-source licenses. An interactive visualization of the benchmark dataset is available at deadtrees.earth/releases/dte-aerial-bench.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 1 minor

Summary. The manuscript introduces two novel open datasets for joint tree cover and mortality segmentation from centimeter-scale aerial imagery: DTE-aerial-train (385K 1024x1024 patches at 2.5-20 cm resolution with expert-annotated and audited pseudo-labels spanning tropical to boreal biomes) and DTE-aerial-bench (525 patches from 25 globally distributed orthoimages with high-quality expert annotations). It establishes baselines showing F1 gains for mortality detection (e.g., 0.40 to 0.58 in boreal forests) and commits to public release of data, models, and code.

Significance. If the labels hold, this release fills a clear gap in globally representative, harmonized training and benchmark data for high-resolution forest disturbance mapping, directly supporting scalable monitoring of climate-driven mortality across biomes. The combination of large training volume, multi-resolution coverage, and a geographically balanced expert-annotated test set, together with reproducible baselines, positions the work as a practical resource for the remote-sensing and computer-vision communities.

major comments (1)
  1. [Abstract] Abstract and dataset description: the central utility claim rests on DTE-aerial-train's 385K patches carrying sufficiently accurate multi-class labels for tree cover and mortality. The text describes these as 'expert-annotated and -audited pseudo-labels' but supplies no inter-annotator agreement statistics, audit sampling fractions, or per-biome/per-mortality-pattern error rates. Without such metrics, systematic label noise (e.g., under-detection of sparse mortality in dense tropical canopies or shadow-induced over-detection in boreal stands) cannot be quantified, directly affecting the reliability of any models trained on the data and the 'first at global scales' assertion.
minor comments (1)
  1. [Abstract] The manuscript could clarify the exact geographic balancing procedure used to select the 25 orthoimages for the benchmark set and whether any stratification by forest structure or mortality density was applied.

Simulated Author's Rebuttal

1 responses · 1 unresolved

We thank the referee for the constructive feedback emphasizing the need for greater transparency on label quality. We address the concern point by point below and commit to revisions that strengthen the dataset documentation without overstating current evidence.

read point-by-point responses
  1. Referee: [Abstract] Abstract and dataset description: the central utility claim rests on DTE-aerial-train's 385K patches carrying sufficiently accurate multi-class labels for tree cover and mortality. The text describes these as 'expert-annotated and -audited pseudo-labels' but supplies no inter-annotator agreement statistics, audit sampling fractions, or per-biome/per-mortality-pattern error rates. Without such metrics, systematic label noise (e.g., under-detection of sparse mortality in dense tropical canopies or shadow-induced over-detection in boreal stands) cannot be quantified, directly affecting the reliability of any models trained on the data and the 'first at global scales' assertion.

    Authors: We agree that the manuscript would benefit from additional detail on the labeling pipeline. The DTE-aerial-train labels combine initial expert annotations on a subset of images with model-generated pseudo-labels that were subsequently audited by the same expert team using standardized guidelines. Because the process relied on a single coordinated annotation team rather than multiple independent annotators, formal inter-annotator agreement statistics were not computed. In the revised manuscript we will add a new subsection under Dataset Construction that reports the audit sampling fraction (approximately 8 % of patches received full manual review) and provides a qualitative discussion of likely error modes by biome, drawing on the auditors' notes. We will also tone down the abstract phrasing to avoid implying that quantitative error rates have been measured. These changes directly respond to the referee's concern while preserving the claim that the dataset is the first harmonized multi-resolution, multi-biome resource of this scale. revision: yes

standing simulated objections not resolved
  • Quantitative per-biome and per-mortality-pattern error rates were not computed during the original auditing process and cannot be retroactively generated without re-annotating a statistically meaningful sample.

Circularity Check

0 steps flagged

No circularity; dataset release paper with independent benchmarks

full rationale

This manuscript is a data-release paper whose core contribution is the introduction of two new open datasets (DTE-aerial-train with 385K patches and DTE-aerial-bench with 25 orthoimages) plus empirical baselines evaluated on the held-out benchmark. No derivations, equations, fitted parameters, or predictions are claimed. The text describes expert-annotated pseudo-labels and reports F1 improvements on the new benchmark, but these are straightforward empirical evaluations against external test data rather than quantities that reduce to the paper's own inputs by construction. No self-citation chains, uniqueness theorems, or ansatzes are invoked to justify load-bearing steps. The paper is therefore self-contained against external benchmarks and receives the default non-circularity finding.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

As a dataset paper the contribution rests primarily on the quality and representativeness of the provided labels rather than on any modeling assumptions or free parameters.

axioms (1)
  • domain assumption Expert-annotated and audited pseudo-labels accurately represent tree cover and mortality across diverse biomes and forest structures
    The training and benchmark utility depends on this label quality; invoked in the abstract description of both datasets.

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