HYPERSPECTRAL MONITORING OF CORAL REEFS A CASE STUDY: FORDATE, TANIMBAR, INDONESIA*

摘要

The overall aim of this study is to monitor coral reefs and associated ecosystems by integrating different remote sensing data with spectral libraries and field measurements. To assess and verify the technical feasibility of a spaceborne hyperspectral sensor, a preliminary bottom-type classification was made based on hyperspectral data from the CHRIS/PROBA sensor. The atmospheric correction was performed with in-house atmospheric correction software, WATCOR, which takes into account atmospheric and air/water-interface effects. Due to the lack of bathymetric information, a water column correction could not be performed. As ground-truth data was available neither, the classification was based on automatic endmember selection using data-inherent spectral and spatial information. After the endmember selection, a Spectral Angle Mapper (SAM) procedure was followed to classify the dataset. Although some problems remain to be solved, the preliminary result presented, shows the potential of spaceborne hyperspectral data for detail coral reef studies.