POTENTIAL INVESTIGATION OF SAR DATA IN MONITORING ISLAND AND ITS SURROUNDING ENVIRONMENTS: 8-YEAR DYNAMIC MONITORING OF SOUTH FIVE-ISLAND IN MIAODAO ARCHIPELAGO OF CHINA

摘要

High resolution, synoptic information on dynamic changes of island and its surrounding environments is required for island management. This study aims to investigate the potential of space-borne Synthetic Aperture Radar (SAR) in deriving such information. Using one ERS SAR image on South five-island in Miaodao archipelago of China, applicability of a threshold approach for coastline detection was tested, then different texture features of gray co-occurrence under varied statistical windows were calculated and selected for SAR image classification. Based on these, an eight-year dynamic monitoring on South five-island from 1997 to 2005 was performed using time-series SAR images, and ability of SAR data in island monitoring was investigated and evaluated.