提高海量遥感影像重采样效率的策略

Strategy of Raising Mass Remote Sensing Images Resample Efficiency

搜索源数据及将源数据块读入内存，是影响海量遥感影像重采样效率的2个主要因素。建立了海量遥感影像源文件索引；根据重采样结果影像的地理范围，建立了搜索区源文件索引；根据子采样块地理范围，读入源数据块并建立链表。这些方法的系统应用，保证了源数据的快速搜索和高效读取，因而较好地实现了海量遥感影像的重采样操作。

Source data searching and source blocks inputting memory are two main tactors tnat affect mass remote sensing images resample efficiency. Index of mass remote sensing images source file is constructed. According to the geographic range of resample result image, index of searching range source files is constructed. On the basis of geographic range of child resample block, source image da- ta blocks is input, and list of these data blocks is set up. The systemic applying of the above methods assures the quick searching and efficient reading of source image data, so that the resample operator of mass remote sensing images works well.