D.W.G. Arthur 1977 <p><span>The note addresses the problem of simultaneously measuring positions and diameters of circular impact craters on wide-angle photographs of approximately spherical planets such as the Moon and Mercury. The method allows for situations in which the camera is not aligned on the planet's center.</span></p> application/pdf 10.1016/0019-1035(77)90054-9 en Elsevier Combined position and diameter measures for lunar craters article