Global mapping of tidal wetlands and adjacent environments using tidal analysis and multi-source Earth observations

This dataset is the first version of the global mapping of tidal wetlands and adjacent environment at a 30 m resolution centered on 2020. It also provides the calculated tidal information for each Sentinel-1 and Sentinel-2 image (cloud cover <10%) across the global coastal zone from 2019–2021. All methods are provided in detail in the accompanying ISPRS Journal of Photogrammetry and Remote Sensing paper, Li et al., (2026) GCLC_2020_10m.rar: Raster dataset for the global mapping of tidal wetlands and adjacent environments at 30 m resolution centered on 2020. Classification scheme (ID – class name):10 – Forest; 20 – Shrubland; 30 – Grassland; 40 – Cropland; 50 – Impervious surfaces; 60 – Bare land; 65 – Tidal flats; 70 – Water body; 75 – Aquaculture ponds; 80 – Tidal marshes; 85 – Mangroves.S1_tide_2019_2021.csv:Lookup table of calculated tidal information corresponding to Sentinel-1 image acquisitions across the global coastal zone from 2019–2021, including mean and median tidal levels. S2_tide_2019_2021.csv:Lookup table of calculated tidal information corresponding to Sentinel-2 image (cloud cover <10%) acquisitions across the global coastal zone from 2019–2021, including mean and median tidal levels.