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A Sharable and Efficient Metadata Model for Heterogeneous Earth Observation Data Retrieval in Multi-Scale Flood Mapping

机译:多尺度洪水测绘中异构地球观测数据检索的高效共享元数据模型

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Remote sensing plays an important role in flood mapping and is helping advance flood monitoring and management. Multi-scale flood mapping is necessary for dividing floods into several stages for comprehensive management. However, existing data systems are typically heterogeneous owing to the use of different access protocols and archiving metadata models. In this paper, we proposed a sharable and efficient metadata model (APEOPM) for constructing an Earth observation (EO) data system to retrieve remote sensing data for flood mapping. The proposed model contains two sub-models, an access protocol model and an enhanced encoding model. The access protocol model helps unify heterogeneous access protocols and can achieve intelligent access via a semantic enhancement method. The enhanced encoding model helps unify a heterogeneous archiving metadata model. Wuhan city, one of the most important cities in the Yangtze River Economic Belt in China, is selected as a study area for testing the retrieval of heterogeneous EO data and flood mapping. The past torrential rain period from 25 March 2015 to 10 April 2015 is chosen as the temporal range in this study. To aid in comprehensive management, mapping is conducted at different spatial and temporal scales. In addition, the efficiency of data retrieval is analyzed, and validation between the flood maps and actual precipitation was conducted. The results show that the flood map coincided with the actual precipitation.
机译:遥感在洪水测绘中起着重要作用,并正在帮助推进洪水的监测和管理。为了将洪水分为几个阶段进行综合管理,必须进行多尺度洪水制图。但是,由于使用不同的访问协议和存档元数据模型,现有的数据系统通常是异构的。在本文中,我们提出了一种可共享和高效的元数据模型(APEOPM),用于构建对地观测(EO)数据系统,以检索用于洪水地图绘制的遥感数据。所提出的模型包含两个子模型,一个访问协议模型和一个增强的编码模型。访问协议模型有助于统一异构访问协议,并可以通过语义增强方法实现智能访问。增强的编码模型有助于统一异构存档元数据模型。武汉市是中国长江经济带最重要的城市之一,被选为研究异质EO数据和洪水地图检索的研究区域。本研究选择2015年3月25日至2015年4月10日的过去暴雨期作为时间范围。为了帮助进行综合管理,在不同的空间和时间尺度上进行制图。此外,分析了数据检索的效率,并进行了洪水图和实际降水量之间的验证。结果表明,洪水图与实际降水相吻合。

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