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| Discussion on Integration and Sharing of Mapping Data in Railway Industry |
| MIN Shi － ping，LIU Xue － mei，ZHANG Yan，LIU Xia － shan |
| China Railway Eryuan Engineering Group Co． Ltd，Chengdu，Sichuan 610031，china |
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Abstract Research purposes: Aiming at the railway mapping data＇s characteristics of the zonal shape，multi － format and multi － location with huge data size and the problems of the low efficiency of data exchange among various professional areas，abnormal management of data and low efficiency of data re － usage，this paper discusses the key technology for the integration and sharing of metadata － based mapping data for providing the reference to the normal management of the railway mapping data and improvement of the exchange efficiency and service quality．
Research conclusions: For solving the problems mentioned above，a method is offered for integration and sharing of the metadat － based mapping data，the standard is worked out for the railway mapping metadata and the connection chart －based three － dimensional visualization inquiry technology is developed for providing the powerful means for the management and application of the railway mapping data． The research result shows this method can meet the demands of the normal management and high － efficient application of the railway mapping data．
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Received: 15 August 2011
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2012, Vol. 29 
