摘要
重庆市高层建筑多且密集,地形复杂破碎、树木遮挡严重,高架桥、立交桥多,建立能真实反映地表起伏的DEM非常困难,导致数字微分纠正时影像拉伸、扭曲变形现象比较普遍,因此山地城市真彩色正射影像图的制作比平原城市要困难得多。本文结合重庆市都市圈1∶2000真彩色正射影像图的制作,介绍了山地城市复杂地形真彩色正射影像制作过程中DEM的采集与编辑、影像修补以及色彩调整等方面的难点技术问题。
Owing to crowed high-rise buildings, complex terrain, prosperous trees and cloverleaf junction in Chongqing, it is extremely difficult to establish the DEM, which can really represent the terrain fluctuation. It always results in image stretch and deformation while doing the digital differential rectification. Therefore, the production of true color digital orthophoto map （DOM） is harder in mountainous city than in plain city. According to the processing of 1： 2 000 true color DOM in Chongqing, this paper introduces several difficulties and technical problems, including DEM acquisition and edition, image repair and color adjusting, in the process of the production of true color DOM in mountainous city.
出处
《测绘与空间地理信息》
2007年第2期147-149,共3页
Geomatics & Spatial Information Technology
