对航摄像片进行逐点（小面积）纠正晒像，消除因像片倾斜和地形起伏对像点的影响，以获得地面正射投影影像的技术。
论述了对高分辨率遥感影像进行精纠正获得正射影像的关键技术。
The key technology of accurate rectification for remote sensing images with high resolution (RSIHR) to acquire orthoimage is introduced.
本研究就是针对这一现实，以山西省昔阳县为研究区域，探讨了基于正射影像图和GIS 技术的土地利用现状变更调查方法。
This paper discusses the methods of land use status update survey based on vertical image and GIS as a case of Xiyang against this situation.
干涉合成孔径雷达是获取场景数字高程模型和正射影像图的有效技术之一。
Interferometric Synthetic Aperture Radar is an effective technique to get Digital Elevation Model and orthophoto map.
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