Alteration areas based on ASTER images for Mineral Exploration
Purchase & Download
Select the tile of your interest
and clic on the link "More info" to begin the purchase process.
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before you check out.
Formats: .shp (ArcGIS/QGIS) and a .kml (Google Earth).
Coordinate System: UTM WGS84 Zone 19 South
Background images are not included since there are better alternatives on which you can overlay this information.
Alteration Index is the resulting raster image after all the processes, shows the probability of 0 to 100, for each pixel, of containing alteration.
We only mark as alteration those pixels with a very high probability (the polygons in red color).
However, this image provides other patterns and trends, interesting information to contrast with other field observations, such as NW-SE lineation (marked in green):
The price of Alteration Index: 0,14 USD per 1 square km
Minimum area: 3600 km2 = $ 500 USD