[crater] This feature has the appearance of a lunar crater that has been nearly submerged by a lava flow, leaving a gap in the southwest wall that gives the feature the shape of a horse-shoe. The floor is overlaid by the linear ray from Mädler. The maximum altitude of the surviving rim is 1.5 km. ==Satellite craters== By convention these f... Found on http://en.wikipedia.org/wiki/Daguerre_(crater)