Title :
Image processing and GIS for hydrothermal alteration mapping, Baguio district, Philippines
Author :
Carranza, Emmanuel John M ; Hale, Martin
Author_Institution :
Int. Inst. for Aerosp. Survey & Earth Sci., Delft, Netherlands
Abstract :
A technique to map hydrothermally altered zones that involves processing of Landsat TM images and integration of ground data is tested in the Baguio district of the Philippines. Two band ratio images are input into principal components (PC) analysis to map each alteration mineral into separate PC `mineral images´. Digitized ground data are used for training pixels for the known alteration zones, urban and water areas. The PC mineral images, a digital elevation model (DEM) of the test area and the training pixels are used in a supervised classification to map hydrothermally altered zones. The known hydrothermally altered zones are clearly mapped in the classified image
Keywords :
geographic information systems; geology; geophysical prospecting; geophysical signal processing; geophysical techniques; image classification; multidimensional signal processing; remote sensing; terrain mapping; Baguio district; DEM; GIS; Landsat TM; Philippines; alteration mineral; digital elevation model; geographic information system; geology; geophysical measurement technique; ground data; hydrothermal alteration mapping; hydrothermally altered zone; image classification; image processing; land surface; mineral deposit; multispectral remote sensing; optical imaging; principal components analysis; prospecting; supervised classification; terrain mapping; training; training pixels; Cities and towns; Geographic Information Systems; Geoscience; Image processing; Mineralization; Minerals; Remote sensing; Satellites; Testing; Vegetation mapping;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.774590
