Accurate mapping of seaweed farms with high-resolution imagery in China

Runjie Jin, Zhanjiang Ye, Shuangshuang Chen, Jiali Gu, Junyu He, Lei Huang, George Christakos, Susana Agusti, Carlos M. Duarte, Jiaping Wu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Seaweed aquaculture is vital in protecting the marine eco-environment and mitigating climate change. China generates more than half of the world’s total seaweed production. However, despite multiple local studies, accurate and reliable information on broad-scale seaweed farms is still scarce. Using an object-based method to classify 3 m spatial resolution Planet Scope images along offshore China, a total of 129,494 ha of cultured seaweed was identified and delineated with an overall accuracy of 95.70% and a KAPPA index of 0.912, respectively. Then, a seaweed map in offshore China in 2018–2019 was developed. The results provided basic information about seaweed farms in China. The approach reported in this work is accurate and efficient, which can be used to replace the conventional method to obtain the culture seaweed information. This study can be of reference for mapping seaweed on a broader or global scale.
Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalGeocarto International
Issue number1
StatePublished - Apr 24 2023

ASJC Scopus subject areas

  • Water Science and Technology
  • Geography, Planning and Development


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