Alteration/minerals information extraction from EO-1 Hyperion data

Satellite-based hyper-spectral imaging became a reality in November 2000 with the successful launch and operation of the Hyperion system on board the EO-1 platform. Hyperion is a pushbroom imager with 220 spectral bands in the 400-2500 nm wavelength range, a 30-meter pixel size and a 7.5 km swath. The objective of this research is to use the Hyperion image for deriving the Rocks/Minerals Information. This paper introduces a complete processing flow from raw Hyperion image to geological theme information map, including radiance calibration and correction, atmospheric correction and geometrical correction, feature extraction and Selection, and spectral mapping by multi-method on the base of referring to the USGS spectral library and ground radiometric measurement data. The study explored the utility of Hyperion data in alteration mineral mapping. Two Hyperion images of the BeiYa in the northwest of YunNan was acquired and evaluated for alteration zone mapping. The results show that the alteration zones in the study area can be identified from Hyperion data very efficiently. The mineralogical and lithologic information extracted from Hyperion data is largely consistent with the geological map and previous research results.