The research on the remote sensing's information tree model of the Nansha coral islets and reef's spatial structure

Besed on the Nansha coral islets and reef's time-space attributes,and the intension and extension of the remote sensing information,the concept model and concept system of coral islets and reef are proposed.Then twin-tree remote sensing information model(or different kinds of reef is constructed by using abstracted islets and reef's primifive,and the structure recognition system for coral islets and reef type is developed.