"Τοπία" (topia) is the plural of "τοπίο" (topio) in Greek, meaning "landscapes"
Topia is a set of three soundscapes to be interpreted musically according to a lexicon of signs and indications.

"Τοπία" (topia) est le pluriel de "τοπίο" (topio) en grec, signifiant "paysages"
Topia est un ensemble de trois paysages sonores à interpreter musicalement selon un lexique de signes et d’indications. 

Lexicon of graphs used in Topia cartographies

Each sign corresponds to sound indications which are then recombined in the drawings.