Identification and conversion rate of rice field in Semarang year 2000-2019 Rossi Prabowo, Aziz Nur Bambang, Sudarno and Agus Rachmad Nurlette E3S Web Conf., 202 (2020) 02002 Published online: 10 November 2020 DOI: 10.1051/e3sconf/202020202002