@ylones
Giomen is right. Original NT format is not breakable i.e. it can't be fully reverse engineered. syzygy's shift-corrected Venus maps are not fully reverse-engineed. Nor does the GMapTool method of converting an NT image result in fully functional mapping data in non-NT format. If someone knows how to truly break NT format they've kept the secret close so far. Pseudo NT is a different ball game as Giomen also said.