The 1647 work 'Selenographia' by the astronomer Johannes Hevelius is a detailed map of what?

Selenographia, sive Lunae descriptio (Selenography, or A Description of The Moon) is a milestone work by Johannes Hevelius, printed in 1647. In his treatise Hevelius reflected on the difference between his own work and that of Galileo Galilei.

From his private observatory in Danzig (now Gdansk) Johannes Hevelius made methodical and precise observations of the moon, and in Selenographia – his first book – he published detailed maps, engraved by himself, of the moon’s surface. Using variously spaced parallel lines he skilfully depicted the silvery textures of the lunar terrain. This finely bound copy of Selenographia was presented to the Bodleian Library (the library of Oxford University, England) by the author in 1649.