摘要
目前,充分利用国产卫星影像,逐步减少使用国外遥感影像,是我国现代测绘产业发展的大趋势。本文基于资源三号国产卫星影像,利用已有的控制点资料,分别基于有控、无控的条件下生成DEM,分析其精度;并在研究区北部边缘选取部分控制点,通过区域网平差,对控制区域进行外推,生成DEM;再利用其余的控制点作为检查点对DEM精度进行检测,分析DEM在外推约100 km范围内的精度能够满足怎样的精度要求。
At present, adequately utilize indigenous satellite images;step by step reduce overseas satellite images, becoming the tendency of modern surveying and mapping industry.This paper produced DEM based on ZY3 satellite images in some control points and no control points.The precision is analyzed.In the north edge of the study area choosing some control points, DEM is produced through regional net adjustment to extrapolation.The other control points are the checking points.The precision of DEM is detected.The precision extrapolating 100 kilometers meeting requirement is analyzed.
出处
《测绘与空间地理信息》
2017年第8期143-146,共4页
Geomatics & Spatial Information Technology
