Abstract
The relative accuracy of aerial photography (Photo-A), Landsat Thematic Mapper color composites (TM-C), and Space Shuttle Imaging Radar (SIR-A) was evaluated by visually analyzing images taken over the Harrat Khaybar, a Cenozoic volcanic field in Saudi Arabia. The cones and flows identified by these images were examined in the field and were compared with those shown on the reconnaissance geological maps of the region. The comparison showed the cone mapping accuracy for the Photo-A, TM-C, and SAR-A images to be 86, 79, amd 64 percent, respectively. For flows (of which five categories were examined), the respective accuracy figures were 84, 62, and 42. (I.S.)