澳大利亚30m分辨率火烧迹地产品精度验证研究

Accuracy Assessment of Australian 30m Resolution Burnt Area Product

高精度火烧迹地信息对于碳循环和全球变化研究具有重要的意义。澳大利亚30 m空间分辨率火烧迹地产品是目前空间分辨率最高的大区域火烧迹地遥感信息产品,为了对该产品的精度进行总体评价,选取长时间序列澳大利亚火烧迹地产品开展精度验证研究,通过随机选取验证点,利用目视解译Landsat影像和Google Earth历史影像作为真值,逐点对产品进行验证。结果表明澳大利亚火烧迹地产品平均精度为81.75%,最高精度为100.00%,最低精度为25.71%。产品精度具有一定波动性,总体精度较高。

Accurate data of fire locations and burned areas is important for the carbon cycling and global change studies.Australian burnt area product with a spatial resolution of 30 meter has been released in recent years,however its accuracy has not been comprehensively evaluated by a third party yet. In this paper, a study was performed for accuracy assessment of the Australian 30 meter burnt area products. Landsat time series burnt area products were selected and the accuracy were assessed by visual inspection based on randomly sampled points. It was found that the accuracy of the Australian burnt area products ranged from 25. 71% to 100. 00%,with the average accuracy of 81. 75%,and the accuracy had a certain volatility but generally with higher value,providing reference for the users at home and abroad to better utilize such products.