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Copernicus Global Land Cover Layers—Collection 2

Open access
Buchhorn, Marcel, Lesiv, Myroslava, Tsendbazar, Nandin-Erdene, Herold, Martin, Bertels, Luc, Smets, Bruno·2020·Remote Sensing
DOI 10.3390/rs12061044
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Abstract

In May 2019, Collection 2 of the Copernicus Global Land Cover layers was released. Next to a global discrete land cover map at 100 m resolution, a set of cover fraction layers is provided depicting the percentual cover of the main land cover types in a pixel. This additional continuous classification scheme represents areas of heterogeneous land cover better than the standard discrete classification scheme. Overall, 20 layers are provided which allow customization of land cover maps to specific user needs or applications (e.g., forest monitoring, crop monitoring, biodiversity and conservation, climate modeling, etc.). However, Collection 2 was not just a global up-scaling, but also includes major improvements in the map quality, reaching around 80% or more overall accuracy. The processing system went into operational status allowing annual updates on a global scale with an additional implemented training and validation data collection system. In this paper, we provide an overview of the major changes in the production of the land cover maps, that have led to this increased accuracy, including aligning with the Sentinel 2 satellite system in the grid and coordinate system, improving the metric extraction, adding better auxiliary data, improving the biome delineations, as well as enhancing the expert rules. An independent validation exercise confirmed the improved classification results. In addition to the methodological improvements, this paper also provides an overview of where the different resources can be found, including access channels to the product layer as well as the detailed peer-review product documentation.

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Cited by

Metadata

Authors
Buchhorn, M., Lesiv, M., Tsendbazar, N.-E., Herold, M., Bertels, L., & Smets, B.
Venue
Remote Sensing
Publisher
MDPI AG
Published
2020-03-24
Volume
12
Issue
6
Pages
1044
ISSN
2072-4292 (ISSN-L)
DOI
10.3390/rs12061044
OpenAlex
W3013341479
Cited by
884
References
2
FWCI
61.51
Type
journal article
Language
en
Open access
gold
Licence
creativecommons.org/licenses/by/4.0/ (vor)

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