摘要
地理空间数据库无法直接应用于铁路工程建设,数据库格式向AutoCAD 格式的转换是亟待解决的问题。为高效获取铁路勘察设计所需地形图,采用了如下的数据转换解决方案:( 1)简单地理空间数据集向AutoCAD 的地图转换不涉及属性的拆分与重组,主要在小型GIS 平台GlobalMapper 下完成;( 2)利用ArcGIS 平台嵌入的空间数据转换工具( Spatial ETL),实现ArcGIS Coverage 中型数据集向AutoCAD 的地图转换;( 3)采用FME 空间数据操作引擎,实现MDB 和GDB 等大型、复杂数据库向AutoCAD 的地图转换。由于地理空间数据集的综合性、复杂性以及冗余度的存在,应优先选取感兴趣的图层及属性字段,进行必要的语义重组,避免转换过程中出现数据冗余度大、重点不突出等问题,提高转换和应用的效率。
Geospatial database cannot be used in railway construction directly. It is a key problem to convert database data to AutoCAD. In order to get topographic maps for railway survey and design efficiently,this research uses a systematic solution for various types of database conversion,which is based on the analysis of various data sources and combining with the production project:( 1) Simple transformation of geospatial data, which does not involve the disassembly and reorganization of attributes,is completed under the platform of Global Mapper.( 2 ) Spatial ETL technology is used in the transformation of medium-sized data set from ArcGIS Coverage to AutoCAD,which is based on the ArcGIS platform.( 3) Large and complex databases such as MDB and GDB can be converted to AutoCAD by FME spatial data operation engine. It is necessary to optimally choose the interesting layers and attribute fields and to recombine the semantics,because of the integrity,complexity and redundancy of geospatial database. It would avoid the problem of data redundancy and non-priority focus in traditional database conversion methods. The research improves the efficiency of transformation and application,then the achievements can be used to convert the geospatial database to AutoCAD maps of home and abroad effectively.
作者
杜辉
Du Hui(China Railway Design Corporation,Tianjin 300142,China)
出处
《铁道勘察》
2019年第4期28-32,共5页
Railway Investigation and Surveying
基金
中国铁路总公司科技开发重点课题(2017G008-E)
中国铁路设计集团有限公司科研课题(721875)
