Seagrasses/seaweeds and coral reefs are important not to only provide abundant biological ecosystems and protect shores from the impact of waves, but also capture and absorb CO2 in the “Blue Carbon” cycle. From the Asia Air Survey, we introduce two coastal mapping projects; the one is to investigate the change of seagrasses/seaweeds before and after the 2011 Tohoku earthquake and tsunami, and the other one is to map coral reefs cover in Kerama-shoto Islands to examine to mapping with satellite-based statistical analysis method is able to substitute the current map with visual interpretation by aerial photo.
