2米分辨率全国一张图(2019)

2米分辨率全国一张图是利用GF-1/B/C/D、GF-6、ZY等国产高分辨率遥感卫星数据，采用基于相位相关的自动匹配技术和区域网平差进行正射校正，在此基础上利用Pansharpen融合算法进行融合，并进行统一的投影变化，最后基于自动提取最优镶嵌线、匀光、匀色、影像归一化等技术进行分布式并行镶嵌处理，实现全国尺度高分辨率遥感影像的快速无缝镶嵌，得到2m分辨率全国一张图。The 2-meter-resolution national seamless mosaic image is developed using domestic high-resolution remote sensing satellite data including GF-1/B/C/D, GF-6, ZY series and other satellites. The processing workflow first conducts orthorectification via phase correlation-based automatic matching technology and block adjustment, then performs image fusion with the Pansharpen fusion algorithm, followed by unified projection transformation, and finally carries out distributed parallel mosaic processing based on technologies such as automatic optimal mosaic line extraction, illumination correction, color balancing and image normalization. This workflow enables fast and seamless mosaicking of national-scale high-resolution remote sensing images, yielding the final 2-meter-resolution national seamless mosaic product.

搜集汇总

背景与挑战

背景概述

该数据集是2019年的2米分辨率全国遥感影像镶嵌产品，利用国产高分辨率卫星数据通过自动匹配、正射校正和并行镶嵌等技术处理生成，实现了全国尺度的高分辨率无缝覆盖。数据存储容量达9.54 TB，包含1123个GeoTiff格式的栅格文件，属于大尺度卫星影像镶嵌产品，适用于地理信息分析和宏观监测应用。