2026-10-06T16:04:53Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33917041 2026-09-18T04:15:14Z category_23860 category_25792 category_26899 category_26626 category_25027 item_type_3 month_year_09_2026

A 10-m annual maize mapping dataset for Northeast China from 2017 to 2024 Xingguang Yan (23695269) Jingyi Le (25068425) Zhen Dong (1698988) Yuhuan Han (23222174) Lang Xia (5745266) Xinyi Guo (3755509) Agricultural land planning Earth and space science informatics Landscape ecology Cartography and digital mapping Land use and environmental planning Maize mapping Northeast China AlphaEarth Foundations Google Earth Engine Crop type classification Random forest Food security <p dir="ltr">This dataset provides annual 10-m resolution maize distribution maps for Northeast China (Heilongjiang, Jilin, and Liaoning provinces) from 2017 to 2024. It is the first long-term, high-resolution maize-specific dataset for this region derived from AlphaEarth Foundations Satellite Embedding V1. The maps were produced on Google Earth Engine using random forest classifiers trained separately for five agro-climate zones across 119 grids. High-confidence training samples for 2017–2022 were extracted by harmonizing six existing crop products, while samples for 2023–2024 were migrated across years using cosine similarity (θ = 0.90) of the 64-dimensional embedding features. The dataset is stored in GeoTIFF format, with pixel values of 1 indicating maize and 0 indicating non-maize, covering the spatial extent of 38°42′–53°55′N and 118°53′–135°09′E. Independent validation against ground-truth samples (2017–2019) yielded maize F1 scores of 0.915–0.936, comparison with municipal statistical yearbook data (2017–2024) showed R² of 0.78–0.90, and test-sample validation produced overall accuracies of 0.934–0.985. The dataset supports research on food security, crop rotation, soil degradation, and climate adaptation in China's most important grain-producing region.</p> 2026-09-18T04:15:14Z Dataset Dataset 10.6084/m9.figshare.33917041.v2 https://figshare.com/articles/dataset/A_10-m_annual_maize_mapping_dataset_for_Northeast_China_from_2017_to_2024/33917041 CC BY 4.0