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本文在元数据模型设计的基础上研究具有良好适应性的市政专业管网数据模型,提出一个面向市政专业管网管理的多层次元数据模型。该模型由元数据项、元类型和元类别3个层次构成,用关系数据库存储实现。专业管网元数据实例与综合管网GIS数据模型相结合,即构成针对市政特定行业的管网数据模型。基于该数据模型构建的供水管网GIS系统可以高效地满足供水企业运营需求,并很好地适应业务的变化。
Based on the metadata model design, this paper studies the municipal professional pipe network data model with good adaptability and proposes a multi-level metadata model for municipal professional pipe network management. The model is composed of three levels: metadata item, metamodel and metaclass, which are realized by relational database storage. The professional pipe network metadata examples combined with the integrated pipe network GIS data model constitute the pipe network data model for municipal-specific industries. The water supply network GIS system constructed based on this data model can effectively meet the operational requirements of water supply enterprises and adapt well to business changes.