An in situ field survey of the reflectance of ground objects was made inYining Basin

Xinjiang Autonomous Region.Correspondence analysis of data(reflectance of 93 groud objects in 4 wave bands)obtained in the surveywas taken by computer.The objects in the basin can be divided into 4 kinds

i.e.water body

snow

vegetation

rock-sand-soil.The reflection spectrumsof the objects are correlative with false-colour synthetic pictures.Some naturalfactors

such as the humidity of soil

the weathering of rock outcrops arebound to have certain influence on the reflection spectrum features.