Digital Earth Australia
Through a joint effort by Geoscience Australia and TERN, mangrove extent and canopy cover type was mapped annually between 1987 and 2016 using dense time-series of 25 m spatial resolution Landsat sensor data available within Digital Earth Australia (DEA). The potential area that mangroves occupied over this period was established as the union of mangrove maps generated for 1996, 2007-2010 and 2015/16 through the Japanese Aerospace Exploration Agency (JAXA) Global Mangrove Watch (GMW). Within this area, the green vegetation fractional cover (GVpc) was retrieved from each available cloud-masked Landsat scene through linear spectral unmixing. The 10th percentile (GVpc10) was then determined for each calendar year by comparing these data in a time-series and the percentage Planimetric Canopy Cover (PCC%) for each Landsat pixel was estimated using a relationship between GVpc10 and LiDAR-derived PCC% (< 1 m resolution and based on acquisitions from all states supporting mangroves, excluding Victoria).
The maps of mangrove extent by cover type are provided by Geoscience Australia and links to these data will be made available in mid 2018 through the following link:
Lymburner, L., Bunting, P., Lucas, R., Scarth, P., Alam, I., Phillips, C., Ticehurst, C. and Held, A. (2018). Mapping the multi-decadal mangrove dynamics of the Australian coastline. Remote Sensing of Environment (in review).