Remote Sensing Study for Potash Exploration in Kohar Playa in the East of Iran
Remote sensing Studies
The forest stages pf the Remote sensing studies was to choose two TM sub-cenes 93/12/1992, orbit 161) & (23/7/1988 orbit 161) that covered the whole area for selecting the enhancement techniques. After radiometric correction by using the scatter plot comparison of bands 1,2,3,4, to 7, the geometric correction based on topographic maps that carried out and ortho images of the area were produced.
After mosalicing the two images that covered the whole area, in order to achieve the optimized colour presentation of images that illustrate the salt crust and clayey boundaries, we should carefully choose the three channels for making colour composite images.
In this study the different enhancement techniques were used: such as contrast stretching, filtering, ration, Principal component and then the colour composite images were produced by co-registerated three bands display using RGB or HIS.
This images provided data about the salt crust and clayey boundaries, black salt, the moisture of the clays, the drainge systems and fans.
TM bands 1,7,4 were displayed as blue, red & green categoreze the clays according to their moisture and the variety of salts according to their clay contents.
Another images clarifies all the above mentioned chrematistics in different colors.
Figure 2: The Color Composite Image of Khour
Mean while there is a third images that has been prepared to shoe Isograde map.
Figure 3: The Rock Units Map of Khour
