| Abstract | Digital integration of SAR, Landsat Thematic Mapper, and geophysical data has been performed in two areas: the Sudbury region in northern Ontario, a major producer of nickel and copper ore; and the
Peace River district in northwest Alberta, where there are several producing oil and gas fields.
Airborne SAR, spaceborne Seasat SAR, and Landsat TM images were geometrically corrected to be registered with gravity and aeromagnetic data. A
simple polynomial transform was used for airborne SAR and Landsat TM rectification. However, because of severe relief distortions within Seasat data, a digital elevation model was produced and used for the rectification.
Various types of
enhancements and integration were performed: the addition of SAR data to Landsat TM data; the addition of SAR data to a colour composite of geophysical parameters; colour-texture transformation between SAR data and Landsat TM4 or vertical magnetic
gradient data, stereoscopic, and perspective viewing.
The value-added products generated were found useful in the display of the correlation between surface and subsurface geological features and for on-going field investigations. In
particular, the addition of SAR data to Landsat TM data provides enhancement of structural geology, while the retention of optimal land use discrimination. The addition of SAR data to a colour composite of geophysical parameters show a tectonic
configuration with all spatial references. Finally, the most useful product is the combination of SAR data with the vertical magnetic gradient data in a colour-texture transformation, which shows very well the correlation between surface linear
features and aeromagnetic discontinuities. |