Depth in relation to Luna surface? Remember it's a crater in a crater.
The Luna Chart I used is http://www.lpi.usra.edu/resources/mapcatalog/LAC/lac42/]here.
The USGS map that I used as co-oberation is http://www.lpi.usra.edu/resources/mapcatalog/usgs/I489/]here. (Yes, that IS a United States Geological Survey map of The Moon.)
In both cases Posidonius is in the top right-hand corner.
The Luna Chart I used is http://www.lpi.usra.edu/resources/mapcatalog/LAC/lac42/]here.
The USGS map that I used as co-oberation is http://www.lpi.usra.edu/resources/mapcatalog/usgs/I489/]here. (Yes, that IS a United States Geological Survey map of The Moon.)
In both cases Posidonius is in the top right-hand corner.