We have surveyed the field spectral reflectivity of partial typical rock in Gansu by the 101W model field spectradiometer made in China

and we have discussed the spectral reflectance characteristics and the relative differences about igneous rock

sedimentary rock

carbonatite and metamorphic rock in the same bands with Landsat MSS.According to the methods of the coincide spectral plot and the standard deviation

we have discussed the selection of the optimum band for discrimination of aforesaid rocks. We have suggested the separability of distinguishing the rocks among five bands in 0.5-1.1μm wavelengths.