Comparison and assessment of NDVI time series for seasonal wetland classification

Panpan Xu, Zhenguo Niu, Ping Tang

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)

Abstract

Satellite-based wetland mapping faces challenges due to the high spatial heterogeneity and dynamic characteristics of seasonal wetlands. Although normalized difference vegetation index (NDVI) time series (NTS) shows great potential in land cover mapping and crop classification, the effectiveness of various NTS with different spatial and temporal resolution has not been evaluated for seasonal wetland classification. To address this issue, we conducted comparisons of those NTS, including the moderate-resolution imaging spectroradiometer (MODIS) NTS with 500 m resolution, NTS fused with MODIS and Landsat data (MOD_LC8-NTS), and HJ-1 NDVI compositions (HJ-1-NTS) with finer resolution, for wetland classification of Poyang Lake. Results showed the following: (1) the NTS with finer resolution was more effective in the classification of seasonal wetlands than that of the MODIS-NTS with 500-m resolution and (2) generally, the HJ-1-NTS performed better than that of the fused NTS, with an overall accuracy of 88.12% for HJ-1-NTS and 83.09% for the MOD_LC8-NTS. Future work should focus on the construction of satellite image time series oriented to highly dynamic characteristics of seasonal wetlands. This study will provide useful guidance for seasonal wetland classification, and benefit the improvements of spatiotemporal fusion models.
Original languageEnglish
Pages (from-to)1103-1131
JournalInternational Journal of Digital Earth
Volume11
Issue number11
DOIs
Publication statusPublished - 2 Nov 2018
Externally publishedYes

Fingerprint Dive into the research topics of 'Comparison and assessment of NDVI time series for seasonal wetland classification'. Together they form a unique fingerprint.

Cite this