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对2008年SPOT5遥感图像进行相关处理,在GIS平台上,采用人机交互式解译的方法,提取出2002～2005年大仓乡京津风沙源工程区小班信息,并通过抽样进行实地调查验证,解译精度达到要求。将解译结果与各年实际造林数据进行比较,工程造林总体保存率达84.97%。结果表明,该方法能够准确、高效、快捷地提取工程区信息,为应用“3S”技术辅助开展京津风沙源工程监测提供了科学依据。
In 2008, the SPOT5 remote sensing images were processed. On the GIS platform, small-class information of Beijing-Tianjin sandstorm source project area from 2002 to 2005 was extracted by human-computer interactive interpretation method and verified by sampling , Interpretation accuracy to meet the requirements. Comparing the interpretation results with the actual afforestation data of each year, the overall preservation rate of afforestation project reached 84.97%. The results show that this method can extract the project area information accurately, efficiently and quickly, and provide a scientific basis for the application of “3S ” technology to assist the monitoring of the sandstorm source project in Beijing and Tianjin.