Mapping crop type in Northeast China during 2017-2023 (Including code for classification)

Northeast China is one of the most major grain production regions in China and has an overwhelming influence on regional and national food security. Crop type mapping is important for crop managements to maximize crop yield. We produced annual 10-m major crops (rice, maize and soybean) maps in Northeast China from 2017 to 2019, using a practical and transferable crop mapping approach by constructing crop-specific OIF knowledge graph (OIFKG). The overall accuracies higher than 90% (Kappa coefficient greater than 0.90), and the producer’s accuracies for rice, maize, and soybean are generally greater than 0.92 based on ground truth data. The crop maps have close agreement with the statistical data at the municipal level. This study provides a highly reliable long-term crop maps dataset, which can be helpful for regional agricultural production management.