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Validation of Automatically Generated Global and Regional Cropland Data Sets: The Case of Tanzania

There is a need to validate existing global cropland maps since they are used for different purposes including agricultural monitoring and assessment. In this paper we validate three recent global products (ESA-CCI, GlobeLand30, FROM-GC) and one regional product (Tanzania Land Cover 2010 Scheme II)...

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Autores principales: Laso Bayas, Juan Carlos, See, Linda, Perger, Christoph, Justice, Christina, Nakalembe, Catherine, Dempewolf, Jan, Fritz, Steffen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MPDI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7340490/
https://www.ncbi.nlm.nih.gov/pubmed/32704489
http://dx.doi.org/10.3390/rs9080815
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author Laso Bayas, Juan Carlos
See, Linda
Perger, Christoph
Justice, Christina
Nakalembe, Catherine
Dempewolf, Jan
Fritz, Steffen
author_facet Laso Bayas, Juan Carlos
See, Linda
Perger, Christoph
Justice, Christina
Nakalembe, Catherine
Dempewolf, Jan
Fritz, Steffen
author_sort Laso Bayas, Juan Carlos
collection PubMed
description There is a need to validate existing global cropland maps since they are used for different purposes including agricultural monitoring and assessment. In this paper we validate three recent global products (ESA-CCI, GlobeLand30, FROM-GC) and one regional product (Tanzania Land Cover 2010 Scheme II) using a validation data set that was collected by students through the Geo-Wiki tool. The ultimate aim was to understand the usefulness of these products for agricultural monitoring. Data were collected wall-to-wall for Kilosa district and for a sample across Tanzania. The results show that the amount of and spatial extent of cropland in the different products differs considerably from 8% to 42% for Tanzania, with similar values for Kilosa district. The agreement of the validation data with the four different products varied between 36% and 54% and highlighted that cropland is overestimated by the ESA-CCI and underestimated by FROM-GC. The validation data were also analyzed for consistency between the student interpreters and also compared with a sample interpreted by five experts for quality assurance. Regarding consistency between the students, there was more than 80% agreement if one difference in cropland category was considered (e.g., between low and medium cropland) while most of the confusion with the experts was also within one category difference. In addition to the validation of current cropland products, the data set collected by the students also has potential value as a training set for improving future cropland products.
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spelling pubmed-73404902020-07-21 Validation of Automatically Generated Global and Regional Cropland Data Sets: The Case of Tanzania Laso Bayas, Juan Carlos See, Linda Perger, Christoph Justice, Christina Nakalembe, Catherine Dempewolf, Jan Fritz, Steffen Remote Sens (Basel) Article There is a need to validate existing global cropland maps since they are used for different purposes including agricultural monitoring and assessment. In this paper we validate three recent global products (ESA-CCI, GlobeLand30, FROM-GC) and one regional product (Tanzania Land Cover 2010 Scheme II) using a validation data set that was collected by students through the Geo-Wiki tool. The ultimate aim was to understand the usefulness of these products for agricultural monitoring. Data were collected wall-to-wall for Kilosa district and for a sample across Tanzania. The results show that the amount of and spatial extent of cropland in the different products differs considerably from 8% to 42% for Tanzania, with similar values for Kilosa district. The agreement of the validation data with the four different products varied between 36% and 54% and highlighted that cropland is overestimated by the ESA-CCI and underestimated by FROM-GC. The validation data were also analyzed for consistency between the student interpreters and also compared with a sample interpreted by five experts for quality assurance. Regarding consistency between the students, there was more than 80% agreement if one difference in cropland category was considered (e.g., between low and medium cropland) while most of the confusion with the experts was also within one category difference. In addition to the validation of current cropland products, the data set collected by the students also has potential value as a training set for improving future cropland products. MPDI 2017-08-09 2017 /pmc/articles/PMC7340490/ /pubmed/32704489 http://dx.doi.org/10.3390/rs9080815 Text en © 2017 The authors. http://creativecommons.org/licenses/by/4.0/ Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Laso Bayas, Juan Carlos
See, Linda
Perger, Christoph
Justice, Christina
Nakalembe, Catherine
Dempewolf, Jan
Fritz, Steffen
Validation of Automatically Generated Global and Regional Cropland Data Sets: The Case of Tanzania
title Validation of Automatically Generated Global and Regional Cropland Data Sets: The Case of Tanzania
title_full Validation of Automatically Generated Global and Regional Cropland Data Sets: The Case of Tanzania
title_fullStr Validation of Automatically Generated Global and Regional Cropland Data Sets: The Case of Tanzania
title_full_unstemmed Validation of Automatically Generated Global and Regional Cropland Data Sets: The Case of Tanzania
title_short Validation of Automatically Generated Global and Regional Cropland Data Sets: The Case of Tanzania
title_sort validation of automatically generated global and regional cropland data sets: the case of tanzania
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7340490/
https://www.ncbi.nlm.nih.gov/pubmed/32704489
http://dx.doi.org/10.3390/rs9080815
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