Mapping Rice Cropping Systems in Vietnam Using an NDVI-Based Time-Series Similarity Measurement Based on DTW Distance

1 State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; [email protected] (X.G.); [email protected] (G.L.); [email protected] (Q.L.) 2 College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China 3 Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 4 Department of Geography and Anthropology, Louisiana State University, Baton Rouge, LA 70803, USA; [email protected] 5 Jiangsu Center for Collaborative Innovation in Geographic Information Resource Development and Application, Nanjing 210023, China * Correspondence: [email protected]; Tel.: +86-10-6488-8372; Fax: +86-10-6488-9630