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Perspectives on validation in digital soil mapping of continuous attributes—A review

Piikki, Kristin and Wetterlind, Johanna and Söderström, Mats and Stenberg, Bo (2021). Perspectives on validation in digital soil mapping of continuous attributes—A review. Soil Use and Management. 37 , 7-21
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Abstract

We performed a systematic mapping of validation methods used in digital soil mapping (DSM), in order to gain an overview of current practices and make recommendations for future publications on DSM studies. A systematic search and screening procedure, largely following the RepOrting standards for Systematic Evidence Syntheses (ROSES) protocol, was carried out. It yielded a database of 188 peer-reviewed DSM studies from the past two decades, all written in English and all presenting a raster map of a continuous soil property. Review of the full-texts showed that most publications (97%) included some type of map validation, while just over one-third (35%) estimated map uncertainty. Most commonly, a combination of multiple (existing) soil sampe datasets was used and the resulting maps were validated by single data-splitting or cross-validation. It was common for essential information to be lacking in method descriptions. This is unfortunate, as lack of information on sampling design (missing in 25% of 188 studies) and sample support (missing in 45% of 188 studies) makes it difficult to interpret what derived validation metrics represent, compromising their usefulness. Therefore, we present a list of method details that should be provided in DSM studies. We also provide a detailed summary of the 28 validation metrics used in published DSM studies, how to interpret the values obtained and whether the metrics can be compared between datasets or soil attributes.

Authors/Creators:Piikki, Kristin and Wetterlind, Johanna and Söderström, Mats and Stenberg, Bo
Title:Perspectives on validation in digital soil mapping of continuous attributes—A review
Series Name/Journal:Soil Use and Management
Year of publishing :2021
Volume:37
Page range:7-21
Number of Pages:15
ISSN:0266-0032
Language:English
Publication Type:Article Review/Survey
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Other Earth and Related Environmental Sciences
Keywords:accuracy, digital soil mapping, systematic map, uncertainty, validation
URN:NBN:urn:nbn:se:slu:epsilon-p-109928
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109928
Additional ID:
Type of IDID
DOI10.1111/sum.12694
Web of Science (WoS)000605561300001
ID Code:22695
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:03 Mar 2021 15:43
Metadata Last Modified:03 Mar 2021 15:51

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