This study was conducted in Tam An commune, Phu Ninh district, Quang Nam province to develop the database of rice land by using an open source software to manage the existing paddy land. 13 paper cadastral maps were digitized and a complete rice land database with 7307 land parcels in the commune using Quantum GIS (QGIS) software was updated. Based on this comprehensive database, the authors developed the maps of paddy land and paddy productivity. The maps would help to protect and develop paddy land in Tam An commune for a long-term management at the local scale.
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