CD Projekt has yet to reveal the full map for Cyberpunk 2077 and Night City but there has been clues to the layout.
There have been a few map layout indicators that have come via promotional materials. The best official map layout is the subway map. This is shown at the start of the first lengthy gameplay video (see below). This map gives a rough idea of zone positioning in relation to each other. That map has also been expanded on with the help of the image used on the cover of World of Cyberpunk book (see below).
The clearest map is one created by Svale Chow which was posted on Reddit on 3 June 2020 which details key locations and the road layout. It gives a much better sense of scale and the play area.
CD Projekt has been keeping the game well under wraps pre-release. Hopefully more of the key locations and map will be revealed prior to the game’s launch.