Combined front and rear Hammer retroazimuthal projection
<a href="//commons.wikimedia.org/wiki/User:Strebe" title="User:Strebe">User:Strebe</a>, using Geocart map projection software; edits by self
<a href="//commons.wikimedia.org/wiki/File:Hammer_retroazimuthal_projection_back_SW.JPG" title="File:Hammer retroazimuthal projection back SW.JPG">File:Hammer retroazimuthal projection back SW.JPG</a>, <a href="//commons.wikimedia.org/wiki/File:Hammer_retroazimuthal_projection_front_SW.JPG" title="File:Hammer retroazimuthal projection front SW.JPG">File:Hammer retroazimuthal projection front SW.JPG</a>