The paper inquired into the characteristic, system architecture of spatial data warehouse and valued crop yield estimation methods we have now.
为此，探讨了空间数据仓库的特征、体系结构，对现有农作物估产方法进行了评价。
Assimilating external data into crop growth model to improve accuracy of crop growth monitoring and yield estimation is a research hotspot in recent years.
利用外部数据同化作物生长模型提高区域作物单产模拟精度是近年来的研究热点。
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