2米分辨率全国一张图(2022)

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 Unified Mosaic Image is developed using domestic high-resolution remote sensing satellite data including GF-1/B/C/D, GF-6, ZY and other domestic series. Firstly, phase-correlation-based automatic matching technology and block adjustment are applied for orthorectification. Then, the Pansharpen fusion algorithm is adopted for image fusion, followed by unified projection transformation. Finally, distributed parallel mosaic processing is conducted based on technologies such as automatic optimal mosaic line extraction, radiometric dodging, color balancing, and image normalization, achieving fast and seamless mosaicking of national-scale high-resolution remote sensing images and obtaining the target 2-meter-resolution National Unified Mosaic Image.

搜集汇总

背景与挑战

背景概述

该数据集是基于国产高分辨率遥感卫星数据（如GF-1/B/C/D、GF-6、ZY）生成的2022年全国尺度2米分辨率无缝镶嵌遥感影像产品，采用正射校正、融合和分布式并行镶嵌等技术处理，存储格式为GeoTiff栅格，总容量9.54 TB，共1123个文件，适用于大范围地理分析和底图应用。