雷达径向风观测在华北区域数值预报系统中的实时三维变分同化应用试验

以实现业务应用为目标开展了区域多部雷达径向风观测资料的三维变分直接同化应用研究。重点对背景场误差协方差的方差和尺度因子进行调整,形成能够与其他常规观测资料协同同化的雷达径向风同化方案,并建立了京津冀6部多普勒雷达观测资料的实时预处理系统。基于上述工作开展2011年汛期京津冀多普勒雷达径向风观测资料在华北区域快速更新循环同化和预报系统中的实时同化和对比试验,并对应用效果进行了初步评估。实时同化试验期间京津冀地区6部雷达经过质量控制后的径向风数据质量和同化情况的分析结果表明,同化系统有效地吸收了雷达径向风的观测信息并形成合理的分析增量,其中,S波段雷达观测的径向风数据数量、质量和稳定度均明显优于C波段雷达;整体来看,雷达径向风同化对地面和高空要素预报性能的影响基本为中性,且主要影响时段集中在最初的6 h。但降水预报评分结果表明,雷达径向风同化从降水强度、落区和范围等方面均明显提升了系统对对流尺度降水的短时预报性能。同时也应该看到,受制于目前3 h一次的同化更新频率,雷达资料同化的效果往往到对流临近时次才能体现。     

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寿光市国土资源综合管理系统的建设与应用

近年来,寿光市以科学发展观为指导,按照国土资源部"金土工程"建设总体要求和省国土资源厅一个平台2个市场的要求,充分利用已有的信息化资源成果,从网络基础设施建设、应用系统建设、档案信息资源建设、标准规范建设、人才队伍建设及网络安全服务等方面进行档案信息化建设,促进党风廉政建设,全面提高寿光市国土资源行政管理效能和社会化服务水平。     

The measure and characteristics of spatial-temporal evolution of China’s science and technology resource allocation efficiency

According to the connotation and structure of science and technology resources and some relevant data of more than 286 cities at prefecture level and above during 2001-2010, using modified method—Data Envelopment Analysis (DEA), science and technology (S&T) resource allocation efficiency of different cities in different periods has been figured out, which, uncovers the distributional difference and change law of S&T resource allocation efficiency from the time-space dimension. Based on that, this paper has analyzed and discussed the spatial distribution pattern and evolution trend of S&T resource allocation efficiency in different cities by virtue of the Exploratory Spatial Data Analysis (ESDA). It turned out that: (1) the average of S&T resource allocation efficiency in cities at prefecture level and above has always stayed at low levels, moreover, with repeated fluctuations between high and low, which shows a decreasing trend year by year. Besides, the gap between the East and the West is widening. (2) The asymmetrical distribution of S&T resource allocation efficiency presents a spatial pattern of successively decreasing from Eastern China, Central China to Western China. The cities whose S&T resource allocation efficiency are at higher level and high level take on a cluster distribution, which fits well with the 23 forming urban agglomerations in China. (3) The coupling degree between S&T resource allocation efficiency and economic environment assumes a certain positive correlation, but not completely the same. The differentiation of S&T resource allocation efficiency is common in regional development, whose existence and evolution are directly or indirectly influenced by and regarded as the reflection of many elements, such as geographical location, the natural endowment and environment of S&T resources and so on. (4) In the perspective of the evolution of spatial structure, S&T resource allocation efficiency of the cities at prefecture level and above shows a notable spatial autocorrelation, which in every period presents a positive correlation. The spatial distribution of S&T resource allocation efficiency in neighboring cities seems to be similar in group, which tends to escalate stepwise. Meanwhile, the whole differentiation of geographical space has a diminishing tendency. (5) Viewed from LISA agglomeration map of S&T resource allocation efficiency in different periods, four agglomeration types have changed differently in spatial location and the range of spatial agglomeration. And the continuity of S&T resource allocation efficiency in geographical space is gradually increasing.     

基于工作流的基础地形数据建库及动态更新关键技术研究与实现

基于南京市国土资源＂一张图＂总体架构,提出了Oralce Spatial 11g＋FME Server的一体化地形数据库建库策略,实现了B/S模式下基于工作流的对任意范围地形的快速更新与智能检查,形成了要素级元数据的管理模式,并在生产中得到实际应用。     

多源影像数据分级存储与数据迁移规则研究

遥感影像数据是国土资源管理的重要基础数据,具有多源、异构、海量、多时相的特点,在数据组织、存储、管理与服务方面具有特定的技术需求。本文针对国土资源遥感影像数据集中管理的情况下,结合数据中心在线、近线和离线的多级存储体系架构,提出了开展多源、异构影像数据分级存储与数据迁移规则的研究,依据影像数据的产品链与生命周期,提出了分级存储的原则、价值评估要素、分级存储的策略与方法,同时提出了基于不同级存储上影像数据之间的迁移规则,对于数据中心开展多源、异构、海量影像数据的高效组织、存储,降低影像数据的运维成本,提升影像数据的应用效率具有指导意义。     

ESB技术在国土资源数据交换中的应用

本文分析了国土资源数据交换的业务需求,阐述基于ESB的数据交换架构的设计思想和与之配套的管理工具,指出基于ESB的数据交换架构是国土资源数据交换的理想方案。     

面向过程的建设用地全程监管时空数据组织模型

本文针对建设用地全程监管多环节、多数据及关系复杂等特点,基于全程监管业务过程和业务需求,提出了面向过程的建设用地全程监管时空数据组织管理模型,探讨了模型组织与存储方式以及回溯与重建操作的实现方法。该模型实现了对建设用地全程监管时空数据语义的一体化组织和表达,可以通过增加辅助表的方式在关系型数据中实现,并能够简单高效的支持用地地块和用地项目的回溯与重建操作,提高建设用地全程监管的效率。     

Data matching of building polygons at multiple map scales improved by contextual information and relaxation

The aim of matching spatial data at different map scales is to find corresponding objects at different levels of detail (LODs) that represent the same real-world phenomena. This is a prerequisite for integrating, evaluating and updating spatial data collected and maintained at various scales. However, matching spatial data is not straightforward due to the ambiguities caused by problems like many-to-many correspondence, non-systematic displacement and different LODs between data sets. This paper proposes an approach to matching areal objects (e.g. buildings) based on relaxation labeling techniques widely applied in pattern recognition and computer vision. The underlying idea is to utilize contextual information (quantified by compatibility coefficient) in an iterative process, where the ambiguities are reduced until a consistent matching is achieved. This paper describes (1) a domain-specific extension to previous relaxation schemes and (2) a new compatibility coefficient that exploits relative relationships between areal object pairs in spatial data. Our approach were validated through extensive experiments using building data sets at 1:10k and 1:50k as an example. Our contextual approach showed superior performance against a non-contextual approach in general and especially in ambiguous situations. The proposed approach can also be applied to matching other areal features and/or for a different scale range.     

Towards a National Atlas of the Netherlands as part of the National Spatial Data Infrastructure

Abstract

This paper is about different worlds, and how we try to unite them. One of these worlds is the world of National Atlases: collections of complex, high-quality maps presenting a nation to the geographically interested. The second is the world of National Spatial Infrastructures: highly organized, standardized and institutionalized large collections of spatial data and services. In the paper, we describe the two worlds and their fundamental differences and we present the theoretical framework in which these worlds could be united. We introduce a test bed we are using to try out the theoretical framework in a real-life use case. In the architecture of that test bed, we introduce a National Atlas Services layer and describe how we have created an Atlas Map Viewer component, using the Open Web Platform. We conclude by commenting on the results thus far and taking a look into future developments.