1. A method for performing normalization of an image in a Geographic Information Systems (GIS) application, the method comprising: computing a histogram for each individual channel of the image; computing a cumulative histogram from the histogram for each individual channel; tripling an intended linear histogram cut off percentage to obtain a new value of linear histogram cut off percentage; computing a colormap by applying the new value of the linear histogram cut off percentage on the cumulative histogram; and applying the colormap to the image data to obtain the normalized image.