You will need to buy a good map either before you visit Venice or as soon as you arrive. A reasonable free map is provided if you purchase a Venice Card from the tourist office or in advance, but otherwise the city doesn't offer much guidance to lost tourists. On this website you'll find various descriptions and tips for finding your way in Venice. To help you get your bearings, I've also created a Google map showing the location of decent restaurants, benches to sit on, tourist sights, bars and so on. I've been very precise about marking their position. But not even the powerful Google giant has managed to solve all your problems. Venice's lanes are too narrow to be clearly visible on the satellite image, and the labelling of streets and squares is inadequate. However, this map will help you to see how Venice is laid out, and could help you to plan sightseeing or choose a conveniently-located hotel. You can zoom in close to see places of interest, or zoom out for an overview of the lagoon and mainland.
Italy Heaven's Google map of Venice
View Venice - recommended restaurants, hotels, sights and more in a larger map
More about Venice's geography
> Arriving in Venice
> Finding your way around Venice