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Comment

A Weighted Accuracy Measure for Land Cover Mapping: Comment on Johnson et al. Local Climate Zone (LCZ) Map Accuracy Assessments Should Account for Land Cover Physical Characteristics that Affect the Local Thermal Environment. Remote Sens. 2019, 11, 2420

1
Department of Geography, Ruhr-University Bochum, 44801 Bochum, Germany
2
Global Cities Institute, University of Toronto, Suite 1308, Toronto, ON M5P 0P6, Canada
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(11), 1769; https://doi.org/10.3390/rs12111769
Received: 27 December 2019 / Revised: 9 April 2020 / Accepted: 6 May 2020 / Published: 31 May 2020
In multi-class classification tasks such as land cover mapping, the achieved accuracies inherently depend on the complexity of the class typology. More specifically, the more complex the typology of (land cover) classes, the lower the resulting accuracies, since the common measures only consider whether a sample was correctly classified or not. To overcome this, a weighted accuracy measure was introduced in 2017 for the case of Local Climate Zone (LCZ) mapping. This method was recently criticized by Johnson and Jozdani and an alternative method was proposed. In this comment, we explain the weighted accuracy measure in more detail and reject the criticism. We show that the proposed method of Johnson and Jozdani is based on weakly supported assumptions. In addition, it is argued that the weighted accuracy is potentially a useful complementary measure beyond the LCZ classification case. View Full-Text
Keywords: Local Climate Zones; land cover mapping; accuracy assessment; multi-class classification; weighted accuracy Local Climate Zones; land cover mapping; accuracy assessment; multi-class classification; weighted accuracy
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MDPI and ACS Style

Bechtel, B.; Demuzere, M.; Stewart, I.D. A Weighted Accuracy Measure for Land Cover Mapping: Comment on Johnson et al. Local Climate Zone (LCZ) Map Accuracy Assessments Should Account for Land Cover Physical Characteristics that Affect the Local Thermal Environment. Remote Sens. 2019, 11, 2420. Remote Sens. 2020, 12, 1769. https://doi.org/10.3390/rs12111769

AMA Style

Bechtel B, Demuzere M, Stewart ID. A Weighted Accuracy Measure for Land Cover Mapping: Comment on Johnson et al. Local Climate Zone (LCZ) Map Accuracy Assessments Should Account for Land Cover Physical Characteristics that Affect the Local Thermal Environment. Remote Sens. 2019, 11, 2420. Remote Sensing. 2020; 12(11):1769. https://doi.org/10.3390/rs12111769

Chicago/Turabian Style

Bechtel, Benjamin, Matthias Demuzere, and Iain D. Stewart 2020. "A Weighted Accuracy Measure for Land Cover Mapping: Comment on Johnson et al. Local Climate Zone (LCZ) Map Accuracy Assessments Should Account for Land Cover Physical Characteristics that Affect the Local Thermal Environment. Remote Sens. 2019, 11, 2420" Remote Sensing 12, no. 11: 1769. https://doi.org/10.3390/rs12111769

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