高分辨率对地观测的若干前沿科学问题

针对GB级大文件形式的高分辨率遥感影像实时可视化过程预处理时耗长等难题，提出了自适应瓦片模型的实时生成方法。基于操作连续性和跨越等级对用户的操作模式进行划分，根据分辨率需求控制瓦片生成顺序，实现不同分辨率瓦片数据的动态生成、选取与调度，从而满足高分辨率遥感影像精细层级的实时可视化，克服了传统“先建库后加载”或者“建立内存金字塔”等方法难以第一时间满足用户“所见即所得”的局限。
以资源三号卫星影像数据为例，验证了该方法的有效性。

Current Issues in High-resolution Earth Observation Technology

Aiming to solve the problem of the long preprocessing time when visualizing real-time high resolution remote sensing images with bigfile formats (GB level), a real-time generation method using self-adaptive pyramid tiles is proposed in this paper. Relying on operation continuity and span level, user operations are divided into different modes. On basis of the demands for various resolutions, tiles with different LODs, are generated, in an adaptive way and are dynamically selected and scheduled in order, so tiles of images at higher resolution are rendered in a timely way.
This method satisfies the need for 'What You See Is What You Get' browsing of a scene in real time, regarded as a challenge in traditional methods, including advanced generation of a pyramid in disk or memory caches. Experiments with ZY-3 satellite images show the validity of this method.