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陆地卫星(Landsat)星载专题制图仪(Thermatic Mapper)和Spot卫星HRV成象仪,是八十年代地球资源观测卫星新一代传感器。其重复成象周期短,获取的TM影象与Spot卫星HRV影象的几何分辨率,辐射分辨率,光谱分辨率均较老一代卫星传感器多光谱成象仪(MSS)要高得多。通过对卫星影象进行几何误差的纠正,卫星影象的几何精度大为提高,与地形图能够很好地吻合。本文用相应比例尺地形图控制,局部卫星影象光学纠正的方法,可使卫星影象的处理精度与计算机处理精度相当。而所需处理费用要低,处理速度快,技术要求相对简单;处理后的影象清晰、直观,便于目视解译大比例尺专业制图。
The Landsat Thermatic Mapper and Spot Satellite HRV Imagers are the next generation of Earth Resources Observing Satellite sensors from the 1980s. Its repetitive imaging period is short, and the geometrical resolution, radiation resolution and spectral resolution of obtained TM images and Spot satellite HRV images are much higher than that of the older generation MSS. By correcting the geometric errors of the satellite images, the geometrical accuracy of the satellite image is greatly improved, which is in good agreement with the topographic map. In this paper, the corresponding scale topographic map control, partial satellite image optical correction method, the satellite image processing accuracy and computer processing accuracy. The required processing costs are low, processing speed, technical requirements are relatively simple; processed images clear and intuitive, easy visual interpretation of large-scale professional mapping.