摘要
在地形起伏大、距离中央子午线远的城市,建立基于CGCS2000的城市坐标系,通过坐标系建立方法和数学模型的分析,经过选择不同的中央子午线、投影面,利用区域内的已有等级控制点,针对高斯投影长度和高差投影变形形成的每千米综合长度变形值进行区域计算分析,对多种设计方案进行比较分析,提出合适的中央子午线和投影面,建立CGCS2000城市坐标系。
In order to build the urban coordinate system on CGCS2000 for the city,which has undulating terrain and long distance with middle meridian, we analyzed the building method and the mathematical model, chose the different middle meridians and projective planes,and then,used the existing level control points to regionally compute and analyze for the comprehensive length distortion per kilometer which comes from the distance and distortion in gauss projection. Finally,we comparatively analyzed many kinds of design schemes,and presented a satisfied middle meridian and projec-tive plane to build the urban coordinate system on CGCS2000.
出处
《城市勘测》
2014年第5期111-113,共3页
Urban Geotechnical Investigation & Surveying
