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讨论了GeoStar系统空间数据组织与管理中的若干问题,重点介绍了空间矢量对象模型、数据组织、数据管理以及对象的实现等内容。 相似文献
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GeoStar is the registered trademark of GIS software made by WTUSM in China. By means of the GeoStar, multi-scale images, DEMs, graphics and attributes integrated in very large seamless databases can be created, and the multi-dimensional dynamic visualization and information extraction are also available. This paper describes the fundamental characteristics of such huge integrated databases, for instance, the data models, database structures and the spatial index strategies. At last, the typical applications of GeoStar for a few pilot projects like the Shanghai CyberCity and the Guangdong provincial spatial data infrastructure (SDI) are illustrated and several concluding remarks are stressed. 相似文献
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GeoStar is the registered trademark of GIS software made by WTUSM in China.By means of the GeoStar,multi-scale images,DEMs,graphics and attributes integrated in very large seamless databases can be created,and the multi-dimensional dynamic visualization and information extraction are also available.This paper describes the fundamental characteristics of such huge integrated databases,for instance,the data models,database structures and the spatial index strategies.At last,the typical applications of GeoStar for a few pilot projects like the Shanghai CyberCity and the Guangdong provincial spatial data infrastructure (SDI) are illustrated and several concluding remarks are stressed. 相似文献
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The advanced data mining technologies and the large quantities of remotely sensed Imagery provide a data mining opportunity with high potential for useful results. Extracting interesting patterns and rules from data sets composed of images and associated ground data can be of importance in object identification, community planning, resource discovery and other areas. In this paper, a data field is presented to express the observed spatial objects and conduct behavior mining on them. First, most of the important aspects are discussed on behavior mining and its implications for the future of data mining. Furthermore, an ideal framework of the behavior mining system is proposed in the network environment. Second, the model of behavior mining is given on the observed spatial objects, including the objects described by the first feature data field and the main feature data field by means of the potential function. Finally, a case study about object identification in public is given and analyzed. The experimental results show that the new model is feasible in behavior mining. 相似文献
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The advanced data mining technologies and the large quantities of remotely sensed Imagery provide a data mining opportunity
with high potential for useful results. Extracting interesting patterns and rules from data sets composed of images and associated
ground data can be of importance in object identification, community planning, resource discovery and other areas. In this
paper, a data field is presented to express the observed spatial objects and conduct behavior mining on them. First, most
of the important aspects are discussed on behavior mining and its implications for the future of data mining. Furthermore,
an ideal framework of the behavior mining system is proposed in the network environment. Second, the model of behavior mining
is given on the observed spatial objects, including the objects described by the first feature data field and the main feature
data field by means of the potential function. Finally, a case study about object identification in public is given and analyzed.
The experimental results show that the new model is feasible in behavior mining.
Supported by the National 973 Program of China(No.2006CB701305,No.2007CB310804), the National Natural Science Fundation of
China (No.60743001), the Best National Thesis Fundation (No.2005047), the National New Century Excellent Talent Fundation
(No.NCET-06-0618). 相似文献
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一种基于RDBMS的面向对象空间数据模型 总被引:2,自引:1,他引:2
本文利用面向对象的抽象、继承和多态等理论和方法,将数据库中的视图、关联、表、角色等概念引入到面向对象的空间数据模型中,提出了一种面向应用、面向主题的基于对象关系数据库的空间数据模型。实践证明:该模型吸收了对象关系数据库高效、安全和协同合作等优势,提高了空间数据使用的灵活性。 相似文献
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本文在不改变原有矢量空间数据库结构和内容的条件下,设计了矢量空间数据版本库,并基于GIS平台实现了数据版本管理插件。该插件截获GIS平台软件发出的矢量要素编辑消息并进行处理,在不改变已有软件和原始矢量空间数据的前提下,实现了矢量空间数据库版本管理的功能,能够记录对矢量数据的增删改操作和每个图层的版本历史,并且能够进行版本回溯。本插件具有开发工作量小、即插即用和对其他GIS功能透明的优点。 相似文献
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一种面向对象的4层空间数据模型 总被引:1,自引:0,他引:1
针对"空间数据是否要建立拓扑关系并在数据库中显式地存储记录"一直是GIS领域争论的问题,给出了解决方案:融合拓扑关系数据模型和面向实体数据模型,进而在分析和总结现有数据模型的基础上提出了一种面向对象的4层空间数据模型.对模型作了4个层次划分:几何对象、基本和复杂要素、分层与分区以及多尺度表达.模型具有3个特点,即多尺度描述地理空间;能描述不同要素层、不同区之间的关系;用户可根据实际情况自定义要素层拓扑关系.最后给出了模型在自主开发的地理数据库管理平台Geoinfo中的应用情况. 相似文献
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ABSTRACT Eighty percent of big data are associated with spatial information, and thus are Big Spatial Data (BSD). BSD provides new and great opportunities to rework problems in urban and environmental sustainability with advanced BSD analytics. To fully leverage the advantages of BSD, it is integrated with conventional data (e.g. remote sensing images) and improved methods are developed. This paper introduces four case studies: (1) Detection of polycentric urban structures; (2) Evaluation of urban vibrancy; (3) Estimation of population exposure to PM2.5; and (4) Urban land-use classification via deep learning. The results provide evidence that integrated methods can harness the advantages of both traditional data and BSD. Meanwhile, they can also improve the effectiveness of big data itself. Finally, this study makes three key recommendations for the development of BSD with regards to data fusion, data and predicting analytics, and theoretical modeling. 相似文献
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煤炭企业属于传统的资源开采型企业,煤矿安全对煤炭企业影响巨大,安全工作在煤矿生产中占有重要地位。其管理好坏直接关系到煤炭企业的生存和发展。煤矿安全管理任务十分艰巨,是因为影响煤矿安全的因素非常复杂,而且含有大量的不确定性因素。本论文利用空间数据挖掘技术来研究采煤方式的选择,并选用焦作矿务局某矿一工作面的实例进行分析,结果表明用粗集来确定采煤方式是比较客观的、科学的和全面的,对保证煤矿的安全提供了一定的保障。 相似文献
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基础空间数据是国土资源和房管GIS的重要组成部分 ,基础空间数据的质量影响和制约着GIS技术在国土资源房管领域的应用。本文以广州市为例 ,从满足国土资源房管的需求角度出发 ,提出了面向国土资源和房管GIS进研基础空间数据生产的观点 ,给出了基于这一观点的一种数据生产模式 ,并对数据生产中的质量控制进行了探讨 ,最后介绍了通过应用实践所获得的一些认识。 相似文献