摘要
为便于对工作区域遥感影像产品的快速浏览和筛选,需要对缺少定位信息的快视图文件进行地理校正。在分析图像定位文件的结构和参数的基础上,研究了利用Python编程语言从影像产品元数据中提取图像四角坐标,再通过GDAL计算地理变换六参数并生成定位文件,实现快视图粗略地理校正的方法。结果显示,具备定位信息后的快视图空间位置准确,与影像产品的地理范围基本一致。本文提出的方法简单方便,可以为遥感产品的管理和便捷应用提供参考。
In order to facilitate the quick browsing and screening of remote sensing image products in the work area,it is necessary to perform geographic correction on the quick-views lacking positioning information.Based on the analysis of the structure and parameters of the image positioning file,the study uses the Python programming language to extract the four-corner coordinates of the image from the image product metadata,and then calculates the six parameters of the geographic transformation through GDAL and generates the positioning file to realize the rough geographic correction of the quick-views.The results show that the spatial location of the quick-views with the positioning information is accurate,which is basically the same as the geographic scope of the imaging product.The method proposed in this paper is simple and convenient,and provides a reference for the management and convenient application of remote sensing products.
作者
李想
高磊
LI Xiang;GAO Lei(Jiangsu Xingyue Surveying and Mapping Technology Co.,Ltd.,Nanjing branch,Nanjing Jiangsu 210000,China;Jiangsu Provincial surveying and Mapping Engineering Institute,Nanjing Jiangsu 210013,China)
出处
《现代测绘》
2022年第3期35-38,共4页
Modern Surveying and Mapping
基金
国防科工局高分专项(42-Y30B04-9001-19/21)
江苏省自然资源发展专项资金(海洋科技创新)(JSZRHYKJ202101)。
关键词
快视图
地理校正
仿射变换
GDAL
quick-views
geometrical rectification
affine transformation
GDAL
作者简介
第一作者:李想,助理工程师,研究方向为摄影测量与遥感。
