近30年中国水稻种植区域与产量时空变化分析(11)

5期刘珍环等：近30年中国水稻种植区域与产量时空变化分析691

度。本研究中水稻种植面积及总产空间分布的分辨率约为10km，结果略显粗糙，受限于

多源数据的空间分辨率集成，包括耕地数据、作物适宜性空间分布等数据。未来通过提高多源数据的空间分辨率提升模拟结果的空间分辨率。

(2)SPAM-China模型结果的验证与比较。数据精度验证一直是空间数据，特别是历史空间数据验证的难题[29]，目前尚未有较好的我国大尺度农作物空间分布数据，更多是耕地空间分布数据[30]，因此研究结果验证较为困难，本研究中只验证了部分数据的精度，采用与其它数据集进行空间对比方法。未来数据精度验证拟从地面样点布设开始，形成样点空间数据集，长期监测样点变化，以期为数据精度验证提供可靠的基础。参考文献(References)

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