crosta.pro

This program performs Crosta transformations (Principal Components with just a well-know subset of TM bands). The Crosta H and F reference is as follows: Loughlin W.P. 1991, Principal Component Analysis for Alteration Mapping. Proceedings 8th Thematic Conference on Geologic Rmote Sensing, Denver, Co. USA, V1, pp293-306, April 29th - may 2nd. 1991. The paper will outline how to run a Crosta analysis for hydroxyl (H) and for iron oxides (F). For the latter however, it uses a PCA on Landsat TM bands 1,3,4 and 5. This is now broadly accepted as being red iron oxide (Fr) and a second PCA using bands 2,3,4 and 5 gives the yellow iron oxides (Fy).