| 3种格网改正数法实现DGN图形无缝坐标转换 |
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| 引用本文： | 白洁,郑凤娇,李江卫,黄兵杰.3种格网改正数法实现DGN图形无缝坐标转换[J].测绘科学技术学报,2012(4):249-253. |
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| 作者姓名： | 白洁 郑凤娇 李江卫 黄兵杰 |
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| 作者单位： | 武汉市测绘研究院 |
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| 基金项目： | 精密工程与工业测量国家测绘地理信息局重点实验室开放基金项目() |
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| 摘 要： | 2000国家大地坐标系启用后,城市原有的测绘成果需完成向2000国家大地坐标系的转换。针对DGN格式的图形文件开发了一套转换软件;采用格网改正法,结合武汉市系列比例尺DGN图形数据转换试验,分析比较了3种格网改正数方法的转换精度;总结了各种比例尺适宜的转换方法,对各地参心坐标系成果向CGCS2000的坐标系统转换具有一定的借鉴作用。
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| 关 键 词： | 2000国家大地坐标系 坐标转换 格网坐标改正数 Shepard法 逐点搜索 |
Applications of Three Methods of Grid Coordinate Corrections in Graphic Conversion Based on DGN File |
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| BAI Jie,ZHENG Fengjiao,LI Jiangwei,HUANG Bingjie.Applications of Three Methods of Grid Coordinate Corrections in Graphic Conversion Based on DGN File[J].Journal of Zhengzhou Institute of Surveying and Mapping,2012(4):249-253. |
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| Authors: | BAI Jie ZHENG Fengjiao LI Jiangwei HUANG Bingjie |
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| Institution: | (Wuhan Geomatics Institute,Wuhan 430022,China) |
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| Abstract: | After China Geodetic Coordinate System 2000(CGCS2000)being adopted as a new geocentric coordinate system of our country,the coordinates of surveying and mapping products under Reference-Ellipsoid-Centric Coordinate System are needed to be transformed.Grid was used in coordinate transformation with DGN files.Three methods of computation of grid were adopted to transform large scale and small scale topographical maps of Wuhan.After comparing the precision of these methods,the proposal of guiding maps transformation of the exist products of surving and mapping to CGCS2000was put forward. |
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| Keywords: | CGCS2000 coordinate transform correction of grid coordinate Shepard method search for parameter calculation point by point |
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