PUBLIC INFORMATION OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109. TELEPHONE (818) 354-5011

PHOTO CAPTION
                                           Magellan
                                           P38721 MGN77
                                           October 29, 1991

Gula Mons is displayed in this computer-simulated view of
the surface of Venus. The viewpoint is located 110 kilometers (68
miles) southwest of Gula Mons at the same elevation as the
summit, 3 kilometers (1.9 miles) above Eistla Regio. Lava flows
extend for hundreds of kilometers across the fractured plains.
The view is to the northeast with Gula Mons appearing at the
center of the image. Gula Mons, a 3 kilometer (1.9 mile) high
volcano, is located at approximately 22 degrees north latitude,
359 degrees east longitude in western Eistla Regio. Magellan
synthetic aperture radar data is combined with radar altimetry to
produce a three-dimensional map of the surface. Rays cast in a
computer intersect the surface to create a three-dimensional
perspective view. Simulated color and a digital elevation map
developed by the U.S. Geological Survey are used to enhance
small-scale structure. The simulated hues are based on color
images recorded by the Soviet Venera 13 and 14 spacecraft. The
image was produced by the JPL Multimission Image Processing
Laboratory and is a single frame from a video released at the
March 5, 1991, JPL news conference.