::: Lost City of Arabia found with Satellite Imagery

A great story and technical explanation of the uses of Landsat satellite imagery to find an ancient city in Arabia called Ubar.  Graphics programs such as Photoshop are exceptional tools to analyze Landsat satellite imagery.  You can pick a color from a known geological or ruin area, and select only those color pixes for the entire image, just one example of the applications of color analysis for archaeological discovery.  The same process of examining threshold data can also be performed on a typical desktop computer with graphics software.  This article- Extracting Ruins in Angkor Region Using Satellite Image Data- describes an in depth study of color pixels to help expose unexcavated ruins using a color threshold technique which can also be performed using a good graphics program on a personal desktop computer.