The map of Caltanissetta is based on OpenStreetMap; you can verify the level of detail on the left-hand map.

In addition to street names, transport stops and other amenities, you can view, search and bookmark the following map features (restaurants, shops, bars...):

The offline map of Caltanissetta also includes these areas:
Piazza Armerina, Canicattì, Nicosia, Palma di Montechiaro, Enna, Barrafranca, Ravanusa, San Cataldo, Caltanissetta, Leonforte, Campobello di Licata, Gela, Mazzarino, Mirabella Imbaccari, Riesi and 3 others.

When you download this map, you also get full Wikipedia articles and photos for the area, available to search and view, even without an internet connection.