Can Commercial Low-Cost Drones and Open-Source GIS Technologies Be Suitable for Semi-Automatic Weed Mapping for Smart Farming? A Case Study in NE Italy. - Pietro Mattivi; Salvatore Eugenio Pappalardo; Nebojsa Nikolic; Luca Mandolesi; Antonio Persichetti; Massimo De Marchi; Roberta Masin (Remote. Sens., 2021)