Evidence map›Paper›PMID 37065619›Full record

ArticlePNAS nexus2023

Deep learning enables image-based tree counting, crown segmentation, and height prediction at national scale.

Sizhuo Li, Martin Brandt, Rasmus Fensholt, Ankit Kariryaa, Christian Igel, Fabian Gieseke, Thomas Nord-Larsen, Stefan Oehmcke, Ask Holm Carlsen, Samuli Junttila and 3 more

Abstract read
In one paragraph

Article in PNAS nexus, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Sizhuo LiDepartment of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen 1350, Denmark.ORCID https://orcid.org/0000-0001-9531-1239
Martin BrandtDepartment of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen 1350, Denmark.
Rasmus FensholtDepartment of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen 1350, Denmark.
Ankit KariryaaDepartment of Computer Science, University of Copenhagen, Copenhagen 2100, Denmark.
Christian IgelDepartment of Computer Science, University of Copenhagen, Copenhagen 2100, Denmark.ORCID https://orcid.org/0000-0003-2868-0856
Fabian GiesekeDepartment of Computer Science, University of Copenhagen, Copenhagen 2100, Denmark.
Thomas Nord-LarsenDepartment of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen 1350, Denmark.ORCID https://orcid.org/0000-0002-5341-6435
Stefan OehmckeDepartment of Computer Science, University of Copenhagen, Copenhagen 2100, Denmark.
Ask Holm CarlsenDepartment of Earth Observations, The Danish Agency for Data Supply and Infrastructure, Copenhagen 2400, Denmark.
Samuli JunttilaDepartment of Forest Sciences, University of Eastern Finland, Joensuu 80101, Finland.
Xiaoye TongDepartment of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen 1350, Denmark.
Alexandre d'AspremontDepartment of Computer Science, École Normale Supérieure, Paris 75230, France.
Philippe CiaisLaboratoire des Sciences du Climat et de l'Environnement, CEA, CNRS, UVSQ, Université Paris-Saclay, Gif-sur-Yvette 91190, France.ORCID https://orcid.org/0000-0001-8560-4943

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Sustainable tree resource management is the key to mitigating climate warming, fostering a green economy, and protecting valuable habitats. Detailed knowledge about tree resources is a prerequisite for such management but is conventionally based on plot-scale data, which often neglects trees outside forests. Here, we present a deep learning-based framework that provides location, crown area, and height for individual overstory trees from aerial images at country scale. We apply the framework on data covering Denmark and show that large trees (stem diameter >10 cm) can be identified with a low bias (12.5%) and that trees outside forests contribute to 30% of the total tree cover, which is typically unrecognized in national inventories. The bias is high (46.6%) when our results are evaluated against all trees taller than 1.3 m, which involve undetectable small or understory trees. Furthermore, we demonstrate that only marginal effort is needed to transfer our framework to data from Finland, despite markedly dissimilar data sources. Our work lays the foundation for digitalized national databases, where large trees are spatially traceable and manageable.

Indexed as

deep learningforest inventoryindividual treesremote sensing

Identifiers

PMID37065619
PMCPMC10096914

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.