利用天绘一号卫星影像快速制作无图区正射影像  

Quickly Producing Orthoimage of No Image＇s Area with TH-01 Satellite Image

作　　者：简剑锋[1,2] 周瑜[1,2] 杨秀策[1,2] 

机构地区：[1]西安测绘研究所,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054

出　　处：《测绘科学与工程》2016年第5期24-30,共7页Geomatics Science and Engineering

摘　　要：针对应急条件下西部无图区使用地图产品的问题，本文提出了利用天绘一号卫星影像产品快速制作正射影像的方法。首先，利用少量控制点（不超过3个）对天绘一号卫星1B级的三线阵和高分辨率卫星影像产品的RPC模型进行精化，并利用精化后的三线阵卫星影像产品进行无图区地形的三维重建，得到数字表面模型（DSM）；然后，基于DSM以及精化后高分辨率影像的RPC模型对影像进行正射纠正，最终得到无图区2m分辨率正射影像数据。本文利用青海某地区的天绘一号卫星影像进行实验，卖验结果表明，无需特殊处理设备，可快速生成2m分辨率正射影像数据，精度达到1：5万地形图成图要求，满足应急条件下无图区使用地图产品的要求。In order to meet the emergent need for map products of certain western areas without images, a method for quick- ly producing orthoimage of no image＇s area with TH-01 satellite image is presented in this paper. The rational polynomial coeffi- cient （RPC） models of the TH-01 satellite＇s 1B level three line image product and high resolution image products are refined by using a few ground control points（ no more than three points）, and the digital surface model （DSM） is set up by utilizing the re- fined TH-01 satellite＇s 1B level three line image products to reconstruct the 3D terrain of no image＇s area. Then the image ortho- rectification based on DSM and the refined RPC model of high resolution image is implemented. Finally the 2-meter resolution or- thoimage data of no image＇s area is obtained. The experiment is carried out by utilizing TH-01 satellite images of a certain area of Qinghai, and the result shows that 2-meter resolution orthoimage could be generated quickly without any special device, and its accuracy meet the requirement of producing a topographic map on a scale of 1 ： 50000, which will satisfy the application require- ments for emergency in no image＇s area.

关 键 词：天绘一号卫星影像 RPC 无图区 正射影像 

分 类 号：P231[天文地球—摄影测量与遥感] TP751.1[天文地球—测绘科学与技术]