Ahmad and Neil (1994) found that Landsat TM gave greater geomorphological detail on reef structure than Landsat MSS. When correlating reef-survey data to satellite imagery, Bainbridge and Reichelt (1989) found SPOT XS to be better correlated than Landsat MSS, which has poorer spatial resolution. Studies of reef flats in Thailand (Thamrongnawasawat and Sudara 1992) suggested that whilst Landsat TM was more useful than SPOT Pan, a merged data source might prove superior to
either. However, this hypothesis was not tested.