Training data in satellite image classification for land cover mapping: a review

Daniel Moraes, Manuel Lameiras Campagnolo, Mário Caetano

Research output: Contribution to journalReview articlepeer-review

1 Citation (Scopus)
6 Downloads (Pure)

Abstract

The current land cover (LC) mapping paradigm relies on automatic satellite imagery classification, predominantly through supervised methods, which depend on training data to calibrate classification algorithms. Hence, training data have a critical influence on classification accuracy. Although research on specific aspects of training data in the LC classification context exists, a study that organizes and synthetizes the multiplicity of aspects and findings of these researches is needed. In this article, we review the training data used for LC classification of satellite imagery. A protocol of identification and selection of relevant documents was followed, resulting in 114 peer-reviewed studies included. Main research topics were identified and documents were characterized according to their contribution to each topic, which allowed uncovering subtopics and categories and synthetizing the main findings regarding different aspects of the training dataset. The analysis found four research topics, namely construction of the training dataset, sample quality, sampling design and advanced learning techniques. Subtopics included sample collection method, sample cleaning procedures, sample size, sampling method, class balance and distribution, among others. A summary of the main findings and approaches provided an overview of the research in this area, which may serve as a starting point for new LC mapping initiatives.
Original languageEnglish
Article number2341414
Pages (from-to)1-16
Number of pages16
JournalEuropean Journal of Remote Sensing
Volume57
Issue number1
Early online date14 Apr 2024
DOIs
Publication statusE-pub ahead of print - 14 Apr 2024

Keywords

  • Land cover
  • satellite images
  • supervised classification
  • training data
  • sampling design
  • sample quality

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