【作者】 汪娜； 岳丽华； 金培权； 万寿红；

【Author】 Wang Na,Yue Lihua,Jin Peiquan,and Wan Shouhong (Department of Computer Science and Technology,University of Science and Technology,Hefei 230027)

【机构】 中国科学技术大学计算机科学与技术学院；

【摘要】 地理空间对象通常包含地理空间数据和属性数据,其中地理空间数据一般包括栅格影像和矢量数据.从地理空间应用的视角,地理空间对象是一个整体,地理空间数据和属性数据是不可割裂的.然而现有的地理空间信息管理技术要么将地理空间数据及其属性数据分开表达和存储,要么只能支持矢量数据或单源栅格影像,无法满足多源地理空间信息的一体化管理需求,针对多源地理空间信息的集成问题,设计提出一种基于矢栅一体化的多源地理空间信息关联模型UnifiedGeospatialModel.该模型将地理空间对象的栅格影像表示为分块的影像金字塔,并采用地理位置关联方法将对象的矢量数据和属性数据与金字塔中的影像块相关联,从而实现了多源地理空间信息的一体化组织.与已有工作相比,UnifiedGeospatialModel可以有效地实现多源栅格影像、矢量数据以及属性数据的关联,并能够支持地理空间信息查询及综合展现等多种地理空间应用.实验结果表明UnifiedGeospatialModel可以有效关联多源地理空间信息并快速响应地理空间信息查询.更多还原

【Abstract】 Geospatial object contains geospatial data and attribute data,and geospatial data includes raster image and vector data.The geospatial object is an entirety which cannot be separated. However,current technique of geospatial information management either give a separate expression and storage of geospatial data and attribute data,or only support vector data or single source raster image,which cannot satisfy the integrated management of multi-source geospatial information. Against the problem of multi-source geospatial information integration,we propose a multi-source geospatial information association model based on the integration of vector and attribute data in this paper.The raster image of geospatial object is expressed as tiled image pyramid in this model,and the vector and attribute data is associated to the tile by spatial location association.The proposed model realizes effective association of multi-source geospatial information and supports the application of geospatial information query and comprehensive visualization,etc.Experiments show that the model could realize effective association of multi-source geospatial information and answer geospatial information query within few minutes.更多还原