摘要
随着2000国家大地坐标系的全面启用,原有地方坐标系已无法满足现代城市建设和社会发展的需要。论文阐述了地方坐标系建立原则和方法,结合投影变形理论对相对独立平面坐标系建立影响因素中中央子午线和投影面的选取进行了详细分析,并以淮安区域为例,结合淮安DEM,详细分析了淮安2000坐标系在淮安市各区县的投影变形情况,同时用格网占比法分析了其与原有坐标系的面积变化。结果表明,淮安2000坐标系在淮安区域内小于2.5 cm/km面积占淮安陆域面积的99.8%,最大投影变形为3.303 cm/km,位于丘陵区域;与原有坐标系相比,在面积变化上优于万分之一,具有良好的适用性。
With the comprehensive use of the national geodetic coordinate system in 2000,the original local coordinate system can not meet the needs of modern urban construction and social development.It expounds the principles of establishing the local coordinate system and method,based on theory of projection distortion,the influence factors of relatively independent plane coordinate system to establish-the central meridian and the selection of plane are analyzed in detail,taking Huaian as an example,combining DEM,huaian 2000 coordinate system are analyzed in detail projection deformation situation of each area county of Huaian.And the area variation of the coordinate system with the original coordinate system is analyzed by using the grid proportion method.The results show that in the Huaian 2000 coordinate system,the area less than 2.5 cm/km accounts for 99.8%of the land area of Huaian,and the maximum projection deformation is 3.303 cm/km,which is located in the hilly area.Compared with the original coordinate system,it is better than 1/10000 in area variation and has good applicability.
作者
邵轩
安艳辉
张良
Shao Xuan;An Yanhui;Zhang Liang(Huan’an Land and Resources Information Center,Huai’an Jiangsu 223005,China;Jiangsu Province Surveying and Mapping Engineering Institute,Nanjing Jiangsu 210013,China)
出处
《山西建筑》
2024年第9期157-160,共4页
Shanxi Architecture
关键词
CGCS2000
投影变形
中央子午线
独立平面坐标系
格网占比法
CGCS2000
distortion of projection
central meridian
independent plane coordinate system
grid proportion method
