基于MicroStation平台的CAD文件动态无损坐标转换方法研究
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摘要
针对如何将DGN、DWG、DXF三种主流CAD文件进行一体化无损转换的问题,提出了一种基于MicroStation平台的点对点动态转换方法,实现了DGN、DWG、DXF格式CAD文件的动态无损坐标转换,转换后得到的数据具有精度无损失,完整保留了图形对象的空间拓扑关系、符号化表达及扩展属性信息的特点。利用该方法开发转换软件,完成了南宁市6 500 km~2范围内地形图、地籍图等各类CAD图件成果的坐标转换。
Aiming at the problem of integrated lossless conversion of three mainstream CAD files of DGN,DWG and DXF,a point-to-point dynamic conversion method based on MicroStation platform is proposed to realize dynamic lossless coordinate transformation of CAD files in DGN,DWG and DXF formats. The data obtained after the conversion has the precision without loss,and completely retains the characteristics of the spatial topological relationship,symbolic expression and extended attribute information of the graphic object. Using this method to develop the conversion software,the coordinate transformation of various CAD drawings such as topographic maps and cadastral maps within 6500 square kilometers of Nanning was completed.
Aiming at the problem of integrated lossless conversion of three mainstream CAD files of DGN,DWG and DXF,a point-to-point dynamic conversion method based on MicroStation platform is proposed to realize dynamic lossless coordinate transformation of CAD files in DGN,DWG and DXF formats. The data obtained after the conversion has the precision without loss,and completely retains the characteristics of the spatial topological relationship,symbolic expression and extended attribute information of the graphic object. Using this method to develop the conversion software,the coordinate transformation of various CAD drawings such as topographic maps and cadastral maps within 6500 square kilometers of Nanning was completed.
引文
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[2] 范冲,王东亮. 基于FME的CAD数据坐标转换工具开发及实现[J]. 测绘与空间地理信息,2014(4):10～13.
[3] 谢梓威,范冲,王东亮等. 基于FME Object的多源数据坐标转换关键技术实现[J]. 测绘与空间地理信息,2016,39(1):190～192.
[4] Bentley Systems Inc. MicroStation Connect Visual Basic for Application Help[DB/CD]. Bentley Product Document,2017.
[5] Bentley Systems Inc. MicroStation CONNECT Edition Help[DB/CD]. Bentley Product Document,2017.
[6] 侯祥意,冯振俭,梁正鑫等. 基于智慧城市的测绘基准服务平台设计与实现[J].企业科技与发展,2018(7):24～26.
[7] 李兆雄. 大范围地理空间信息点对点坐标转换设计与实现[J].地理空间信息,2010(2):21～25.