Using the Google Earth (>v.5) lunar digital elevation model, after downloading that application's latest catalog of LROC images available through the Planetary Data System (PDS), prepared and updated this past week by Washington University, shows the extent of the only two publicly released LROC Narrow Angle Camera (NAC) observations of "the Straight Wall" of eastern Mare Nubium. Rendered immediately below is a monochrome Wide Angle Camera (WAC) mosaic of the vicinity (stretched, below) that provides a lower resolution but still unprecedented detail of nearby Birt and its ejecta blanket, its companion Birt A and Rima Birt with its "cobra head" feature discussed here July 8, 2010 [NASA/USGS/JAXA/GSFC/Arizona State University/WUSTL/Google Earth].
The 114 km-long landmark "straight wall" with companions Birt and Birt A along the southwest shore of Mare Nubium. With Rima Birt at left, these have often been discussed on the Network. LROC Wide Angle Camera mosaic assembled from images gathered on three successive orbital passes January 7, 2010; processed using LROC WAC Previewer (v.1.6) and stitched together using Microsoft Research Image Composite Editor (ICE) [NASA/GSFC/Arizona State University].