When you realise that you need to modify an environment, with a view to beautification, accessibility or even restoration, you first need to think about who depends on that space, what the space has been used for in the past and today, what the probable interferences and medium- and long-term purposes of the space to be worked on are; with these different perspectives in mind, and with a view to facilitating the landscaper, we have taken the initiative to write this book. It is a set of recommendations written in clear, easy-to-understand language.