This is an ortho-image of Nepenthes Mensae. The image is overlaid with elevation data from an HRSC-derived high-resolution digital terrain model (DTM).
In an ortho-image, the projecting rays are perpendicular to the plane of projection. This corrects any deformations introduced by an imaging camera. Such an image can be fitted directly on to a map.
The High Resolution Stereo Camera on board ESA’s Mars Express orbiter imaged Nepenthes Mensae, a river delta on Mars, on 22 January 2008.
The data was acquired in the region lying at approximately 3° north and 121° east with a ground resolution of 15 m/pixel.