arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.08720cs.LG
收藏

用很少的真值预测作物产量:一个简单的季节预报统计模型

Predicting crop yields with little ground truth: A simple statistical model for in-season forecasting

Nemo Semret

摘要:

我们提出了一个全自动的模型,在季节作物产量预测,旨在工作的地方,有一个缺乏次国家的“真值”信息。我们的方法主要依赖于卫星数据,其特点是仔细的功能工程结合一个简单的回归模型。因此,它几乎可以在世界任何地方工作。将其应用于10个不同的作物国家对(5种谷物-玉米,小麦,高粱,大麦和小米,在2个国家-埃塞俄比亚和肯尼亚),我们在一年中的9个月预测中实现了5%-10%的RMSE,在一年中的3个月预测中实现了7%-14%。该模型输出本年度最终收益率的每日预测。它使用每个作物-国家对的大约400万个数据点进行训练。这些数据包括:历史上国家一级的年产量、作物日历、作物覆盖、归一化差异植被指数、温度、降雨量和蒸散量。

英文摘要:

We present a fully automated model for in-season crop yield prediction, designed to work where there is a dearth of sub-national "ground truth" information. Our approach relies primarily on satellite data and is characterized by careful feature engineering combined with a simple regression model. As such, it can work almost anywhere in the world. Applying it to 10 different crop-country pairs (5 cereals -- corn, wheat, sorghum, barley and millet, in 2 countries -- Ethiopia and Kenya), we achieve RMSEs of 5%-10% for predictions 9 months into the year, and 7%-14% for predictions 3 months into the year. The model outputs daily forecasts for the final yield of the current year. It is trained using approximately 4 million data points for each crop-country pair. These consist of: historical country-level annual yields, crop calendars, crop cover, NDVI, temperature, rainfall, and evapotransporation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑